如题，映入该依赖就报错，这是我的pom ``` <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>springclouddemo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springclouddemo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <spring-cloud.version>Greenwich.SR5</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> ``` 错误内容如下 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration': Unsatisfied dependency expressed through field 'optionalArgs'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'discoveryClientOptionalArgs' defined in class path resource [org/springframework/cloud/netflix/eureka/config/DiscoveryClientOptionalArgsConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.netflix.discovery.AbstractDiscoveryClientOptionalArgs] from ClassLoader [sun.misc.Launcher$AppClassLoader@b4aac2] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE] at com.example.springclouddemo.SpringclouddemoApplication.main(SpringclouddemoApplication.java:14) [classes/:na] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'discoveryClientOptionalArgs' defined in class path resource [org/springframework/cloud/netflix/eureka/config/DiscoveryClientOptionalArgsConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.netflix.discovery.AbstractDiscoveryClientOptionalArgs] from ClassLoader [sun.misc.Launcher$AppClassLoader@b4aac2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:570) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] ... 19 common frames omitted Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.netflix.discovery.AbstractDiscoveryClientOptionalArgs] from ClassLoader [sun.misc.Launcher$AppClassLoader@b4aac2] at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:507) ~[spring-core-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:367) ~[spring-core-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:207) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:189) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:128) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:297) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1077) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:567) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE] ... 28 common frames omitted Caused by: java.lang.NoClassDefFoundError: com/netflix/eventbus/spi/EventBus at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_152] at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_152] at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_152] at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:489) ~[spring-core-5.1.8.RELEASE.jar:5.1.8.RELEASE] ... 35 common frames omitted Caused by: java.lang.ClassNotFoundException: com.netflix.eventbus.spi.EventBus at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_152] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_152] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_152] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_152] ... 39 common frames omitted

maven项目引入springcloud相关jar报错 <parent>标签标错 For artifact {org.springframework.cloud:spring-cloud-starter-consul-discovery:null:jar}: The version cannot be empty. (org.apache.maven.plugins:maven-resources-plugin:3.0.1:testResources:default-testResources:process-test-resources) <dependency>标签报错 Project build error: Non-resolvable import POM: Failure to find org.springframework.cloud:spring-cloud-dependencies:pom:Finchley.M7 in http://maven.aliyun.com/nexus/content/groups/public was cached in the local repository, resolution will not be reattempted until the update interval of window-aliyun has elapsed or updates are forced

spring-cloud eureka客户端不注册。spring-cloud搭建的项目，一个是eureka的服务端，然后另一个是服务提供者。但是这个服务提供者不注册。 配置文件如下： eureka服务:pom.xml ``` <?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.hydrakyoufeng</groupId> <artifactId>hydrakyoufeng-sc</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <artifactId>hydrakyoufeng-eureka</artifactId> <name>hydrakyoufeng-eureka</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- eureka服务器 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-eureka-server</artifactId> </dependency> <!-- 容器，加上后euraka才能启动 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-context</artifactId> </dependency> <!-- 安全依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> </dependencies> </project> ``` eureka服务的application.yml： ``` server: #端口号 eureka服务器端口 port: 8083 spring: application: name: eureka datasource: type: com.alibaba.druid.pool.DruidDataSource driverClassName: com.mysql.cj.jdbc.Driver url: jdbc:mysql://127.0.0.1:3306/ci?serverTimezone=PRC&characterEncoding=utf-8&useSSL=true username: xxx password: xxx maxActive: 20 maxIdle: 10 maxWaitMillis: -1 initialSize: 5 #main: #allow-bean-definition-overriding: true security: # 密码配置2.1之后这样配置 user: name: Hydra password: 19861213hkf eureka: client: # 下面两个是非集群的配置 register-with-eureka: false fetch-registry: false service-url: defaultZone: http://Hydra:19861213hkf@127.0.0.1:8083/eureka #默认的访问风格（未设置用户名和密码时） #defaultZone: http://localhost:8083/eureka/ ``` 然后是服务提供者（provider）的pom.xml： ``` <?xml version="1.0"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <artifactId>hydrakyoufeng-provider</artifactId> <packaging>jar</packaging> <parent> <groupId>org.hydrakyoufeng</groupId> <artifactId>hydrakyoufeng-sc</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <name>hydrakyoufeng-provider</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-eureka-client</artifactId> </dependency> </dependencies> </project> ``` 然后是服务提供者（provider）的application.yml： server: #端口号 eureka服务器端口 port: 8083 spring: application: name: eureka datasource: type: com.alibaba.druid.pool.DruidDataSource driverClassName: com.mysql.cj.jdbc.Driver url: jdbc:mysql://127.0.0.1:3306/ci?serverTimezone=PRC&characterEncoding=utf-8&useSSL=true username: xxx password: xxxxx maxActive: 20 maxIdle: 10 maxWaitMillis: -1 initialSize: 5 #main: #allow-bean-definition-overriding: true security: # 密码配置2.1之后这样配置 user: name: Hydra password: 19861213hkf eureka: client: # 下面两个是非集群的配置 register-with-eureka: false fetch-registry: false service-url: defaultZone: http://Hydra:19861213hkf@127.0.0.1:8083/eureka #默认的访问风格（未设置用户名和密码时） #defaultZone: http://localhost:8083/eureka/ 两个都启动后， 然后开打127.0.0.1:8083/eureka 输入用户名和密码，界面如下（看不到注册的提供者）：  最后是我两个app的启动类： ``` @SpringBootApplication @EnableEurekaServer public class EurekaStart { public static void main(String[] args) { SpringApplication.run(EurekaStart.class); } } ``` ``` @EnableEurekaClient @SpringBootApplication @MapperScan("org.hydrakyoufeng.provider") public class ProviderStart { /** * 启动j2se的springboot * @param args */ public static void main(String[] args) { SpringApplication.run(ProviderStart.class); } } // 刚才代码贴掉了，这两个注解我是加了的。 ``` 我的提供者无法完成注册，日志没有任何注册相关的消息，也没有任何异常打印。

有没有用spring cloud 得小伙伴，在注册服务之后，调用时报： com.netflix.client.ClientException: Load balancer does not have available server for client: ec 得解决方案， （ps:相关依赖也已经引入 如下） <!--增加eureka-client的依赖--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <!-- 添加 feign 依赖，远程调用rest api--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-feign</artifactId> </dependency>

1.springcloud Finacy Release hystrix dashboard eureka 作为注册中心 hystrix 访问下载 hystrix 文件 /hystrix 一直ping ，使用zookeeper 作为注册中心的时候没有问题。 2.使用zookeeper 作为注册中心，使用Tubline 作为监控的时候一直报EurekaClient not found ，但是jar包是引入了，就是不知道为为什么找不到 已经加入hystrix 注解和 hystrix 注解对应的jar 包 和 spring-boot-acuator 的jar包 已经在bean 中创建那个/hystrix.stream 的 servlet 使用zookeeper 作为注册中心的时候是可以的， @EnableHystrix @EnableHystrixDashboard @EnableEurekaClient @EnableDiscoveryClient //@SpringBootApplicat ion(exclude = {EurekaClientAutoConfiguration.class}) @SpringBootApplication public class SpringcloudClientApplication { @Bean @LoadBalanced RestTemplate restTemplate(){ return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(SpringcloudClientApplication.class, args); } } #服务端口号 server: port: 8090 #应用名称 spring: application: name: eureka-client data: mongodb: uri: mongodb://192.168.209.128:27017/user cloud: #zookeeper: #connect-string: 192.168.209.128:2181 #discovery: #register: true #enabled: true #instance-id: 1 #root: /zkRoot config: enabled: true discovery: enabled: true loadbalancer: retry: enabled: true #consule: #host: 127.0.0.1 #port: 8500 #discovery: #register: false security: user: name: wumging password: wuming # Redis数据库索引（默认为0） redis: database: 10 host: 192.168.209.128 port: 6379 timeout : 1000 ribbon: eureka: enabled: true feign: hystrix: enabled: false management : endpoints: web: exposure: include: hystrix.stream #turbine: #app-config: eureka-server,eureka-server2 #aggregator: #clusterConfig: default #clusterNameExpression: "'default'" #combine-host-port: true #instanceUrlSuffix: /hystrix.stream hystrix: common: default: execution: timeout: enabled: false isolation: thread: timeoutInMilliseconds: 5000 #服务注册地址 eureka: client: registerWithEureka: false fetchRegistry: false serviceUrl: defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/ <dependencies> <dependency> <groupId>org.springcloud</groupId> <artifactId>springcloud-common</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> </dependency> --> <!-- <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.8</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </exclusion> </exclusions> </dependency>--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <!-- <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-consul</artifactId> </dependency> --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <!-- <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-turbine</artifactId> </dependency> --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-zuul</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies>

springCloud没有eureka 或者其他的服务治理 还可以用吗

我eureka中有这个服务名称，为什么使用Ribbon后就报没有实例异常呢，各位大神求助  ``` java.lang.IllegalStateException: No instances available for CLOUDSERVICE-DEPT at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:75) ~[spring-cloud-netflix-core-1.3.1.RELEASE.jar:1.3.1.RELEASE] at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:55) ~[spring-cloud-commons-1.2.2.RELEASE.jar:1.2.2.RELEASE] at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:659) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:620) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:294) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at com.tang.controller.DeptController_Consumer.get(DeptController_Consumer.java:33) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211] ```

环境： maven3.0+springboot2.2.0 想做微服务调用使用feign，启动类添加@EnableDiscoveryClient和@EnableDiscoveryClient pom文件添加： ``` <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <name>consumer</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> <version>2.1.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-feign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-openfeign-core</artifactId> <version>2.0.0.RC1</version> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> <version>2.0.0.RC1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> ``` 如果不添加spring-cloud-openfeign-core，注解无法使用。 如果添加了他，启动项目时报错context找不到。 真心是无解了。。。。这springboot2.2.0怎么这么多坑

springcloud 分布式部署遇到了一些问题， 我目前有二台服务器：阿里云，和腾讯云 A、在腾讯云上用ngnix映射我的网站，代理转发eureka; B、阿里云，部署eureka和一个业务服务端z； 目前出现的问题是，我在本地启用zuul服务和feign服务，可以注册到C上的eureka服务，但是请求不到阿里云服务器B上的业务服务端z,后台打印请求的地址是阿里云的本地服务ip,而不是公网IP；我现在不知道怎么设置eureka获取公网ip,有没有大神遇到过? eureka 配置  zuul 配置 

依下是添加的代码 <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.M9</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> 以下是报错详情。说另一个子模块common依赖出问题了。  但每次只是一个或几个（不一定是哪几个）报错，其他依赖common的子模块都没报错

spring cloud中，为关闭命令添加了security验证，但是发现eureka注册也被拦截了，返回403错误，但是security过滤的url就只有shutdown，另外发布一个测试服务，url也没被过滤可以被直接访问，但为什么eureka就被过滤了呢，哪位大神知道原因吗

父工程代码如下： pom ``` <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.1.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.RELEASE</spring-cloud.version> </properties> <!-- 公共依赖 --> <dependencies> <!-- 核心包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!-- 配置文件处理器 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> <!-- 监控 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <!-- Lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <!-- 测试依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <!-- 依赖管理 --> <dependencyManagement> <dependencies> <!-- spring cloud依赖 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> ``` 注册中心代码如下： pom ``` <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> </dependencies> ``` bootstrap.yml ``` server: port: 8761 spring: application: name: 127.0.0.1 eureka: instance: hostname: cloud-eureka-server client: registerWithEureka: false fetchRegistry: false serviceUrl: defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ ``` CloudEurekaServerBootstrap.java ``` @EnableEurekaServer @SpringBootApplication public class CloudEurekaServerBootstrap { public static void main(String[] args) { SpringApplication.run(CloudEurekaServerBootstrap.class, args); } } ``` 配置中心服务端代码如下： pom ``` <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId> </dependency> </dependencies> ``` bootstrap.yml ``` server: port: 8881 eureka: instance: prefer-ip-address: true client: serviceUrl: defaultZone: http://localhost:8761/eureka/ spring: application: name: cloud-config-amqp-server cloud: config: server: native: search-locations: - classpath:/shared/ profiles: active: - native rabbitmq: host: 192.168.46.120 username: username password: password management: endpoints: web: exposure: include: "*" cors: allowed-origins: "*" allowed-methods: "*" ``` shared/cloud-config-amqp-client-dev.yml ``` server: version: V1.0 ``` CloudConfigAmqpServerBootstrap.java ``` @EnableDiscoveryClient @EnableEurekaClient @EnableConfigServer @SpringBootApplication public class CloudConfigAmqpServerBootstrap { public static void main(String[] args) { SpringApplication.run(CloudConfigAmqpServerBootstrap.class, args); } } ``` 配置中心客户端代码如下 pom ``` <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> ``` bootstrap.yml ``` server: port: 8801 eureka: instance: prefer-ip-address: true client: serviceUrl: defaultZone: http://localhost:8761/eureka/ spring: application: name: cloud-config-amqp-client cloud: config: discovery: enabled: true service-id: cloud-config-amqp-server profile: dev bus: enabled: true trace: enabled: true rabbitmq: host: 192.168.46.120 username: username password: password management: endpoints: web: exposure: include: "*" cors: allowed-origins: "*" allowed-methods: "*" ``` VersionController.java ``` @RefreshScope @RestController public class VersionController { @Value("${server.version}") String version; @RequestMapping(value = "/version") public String getVersion() { return version; } } ``` CloudConfigAmqpClientBootstrap.java ``` @EnableEurekaClient @SpringBootApplication public class CloudConfigAmqpClientBootstrap { public static void main(String[] args) { SpringApplication.run(CloudConfigAmqpClientBootstrap.class, args); } } ```

使用Feign做负载均衡的时候，本来用的SpringBoot版本是1.5.3，没有问题。可是当我换成2.1.3，发现请求报错,错误提示：  代码如下： POM.XML ```xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>feign</artifactId> <version>0.0.1-SNAPSHOT</version> <name>feign</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>com.netflix.hystrix</groupId> <artifactId>hystrix-javanica</artifactId> <version>1.5.12</version> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.RC1</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.18.1</version> <configuration> <skipTests>true</skipTests> </configuration> </plugin> </plugins> </build> </project> ``` FeignApplication  Service  application.yml ```yml eureka: client: serviceUrl: defaultZone: http://m103:8761/eureka/ server: port: 8901 spring: application: name: service-feign feign: httpclient: enabled: true hystrix: enabled: true management: endpoints: web: exposure: include: "*" exclude: env ``` 有没有人看一下问题出在哪里？

自学spring cloud 遇到难点，有些东西不是特别理解希望有大佬看到能给予一下帮助，不胜感激。 在学习配置中心文件代码如下 application.yml ``` spring: cloud: config: server: native: search-locations: classpath:/config profiles: active: native # git: # uri: https://gitee.com/zhongzunfa/spring-cloud-config.git # search-paths: V1-DEV application: name: config-server server: port: 9092 #启动端口 ``` config文件包含如下内容 ``` spring: gfp: name: "gfp" sex: 1 age: 18 ``` 可在浏览器中输入地址：http://localhost:9092/author/spring 查看到对应信息  在客户端中配置类如下两个配置文件 bootstrap.yml ``` spring: cloud: config: label: master uri: http://localhost:9092/author/spring name: author ``` application.yml ``` spring: application: name: config-client-consumer server: port: 9093 ``` 再对应的属性注入部分为如下设置 ``` @Component @ConfigurationProperties(prefix = "spring.gfp") public class AuthorConfig { private String name; private Integer age; private Integer sex; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public Integer getSex() { return sex; } public void setSex(Integer sex) { this.sex = sex; } @Override public String toString() { return "AuthorConfig{" + "name='" + name + '\'' + ", age=" + age + ", sex=" + sex + '}'; } ``` 抛出异常为如下，非常不解如何设置， ``` com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1] at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1] at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.2.jar:1.9.2] at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1] at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1] at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1] at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.1.jar:1.19.1] at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplicationsInternal(AbstractJerseyEurekaHttpClient.java:194) ~[eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165) ~[eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) ~[eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) ~[eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) [eureka-client-1.9.2.jar:1.9.2] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.9.2.jar:1.9.2] ```

刚开始学习springCloud,使用Eureka的时候注册中心启动没有问题,客户端却启动报错,搞了一天还没搞明白,求大神帮忙. 刚才悬赏有点少,现在加到80 报错信息 ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1254) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$1(AbstractBeanFactory.java:353) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:384) ~[spring-cloud-context-2.0.0.M8.jar:2.0.0.M8] at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:183) ~[spring-cloud-context-2.0.0.M8.jar:2.0.0.M8] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:350) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getTargetObject(EurekaRegistration.java:167) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getEurekaClient(EurekaRegistration.java:156) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:57) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:39) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:80) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:52) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:157) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:121) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:885) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at com.dcb.myspringboot.hello.BootDemoApplication.main(BootDemoApplication.java:20) [classes/:na] Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] ... 30 common frames omitted Caused by: java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at com.google.common.collect.Interners$WeakInterner.<init>(Interners.java:68) ~[guava-18.0.jar:na] at com.google.common.collect.Interners$WeakInterner.<init>(Interners.java:66) ~[guava-18.0.jar:na] at com.google.common.collect.Interners.newWeakInterner(Interners.java:63) ~[guava-18.0.jar:na] at com.netflix.servo.tag.Tags.<clinit>(Tags.java:26) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.BasicTimer.<clinit>(BasicTimer.java:36) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.Monitors.newTimer(Monitors.java:87) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.Monitors.newTimer(Monitors.java:72) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:132) ~[eureka-client-1.8.6.jar:1.8.6] at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:269) ~[eureka-client-1.8.6.jar:1.8.6] at org.springframework.cloud.netflix.eureka.CloudEurekaClient.<init>(CloudEurekaClient.java:63) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:269) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44.CGLIB$eurekaClient$0(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44$$FastClassBySpringCGLIB$$9e5161f9.invoke(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44.eurekaClient(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] ... 31 common frames omitted ``` 配置信息  启动类也加注解了 

使用springboot启动一切正常 run on server 跑起来无法访问 eureka首页 ``` 2019-05-20 17:38:53.768 INFO 7884 --- [ main] com.example.demo.ServletInitializer : No active profile set, falling back to default profiles: default 2019-05-20 17:38:55.377 WARN 7884 --- [ main] o.s.boot.actuate.endpoint.EndpointId : Endpoint ID 'service-registry' contains invalid characters, please migrate to a valid format. 2019-05-20 17:38:56.471 INFO 7884 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=526ac23a-b26e-3353-b9ab-50e7bcf72d48 2019-05-20 17:38:56.706 INFO 7884 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$976b1f47] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2019-05-20 17:38:56.714 INFO 7884 --- [ main] o.a.c.c.C.[.[localhost].[/eureka] : Initializing Spring embedded WebApplicationContext 2019-05-20 17:38:56.714 INFO 7884 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2914 ms 2019-05-20 17:38:57.117 WARN 7884 --- [ main] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources. 2019-05-20 17:38:57.117 INFO 7884 --- [ main] c.n.c.sources.URLConfigurationSource : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 2019-05-20 17:38:57.151 INFO 7884 --- [ main] c.netflix.config.DynamicPropertyFactory : DynamicPropertyFactory is initialized with configuration sources: com.netflix.config.ConcurrentCompositeConfiguration@5d0b5f31 2019-05-20 17:38:59.724 WARN 7884 --- [ main] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources. 2019-05-20 17:38:59.725 INFO 7884 --- [ main] c.n.c.sources.URLConfigurationSource : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 2019-05-20 17:39:00.103 INFO 7884 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor' 2019-05-20 17:39:01.714 INFO 7884 --- [ main] o.s.c.n.eureka.InstanceInfoFactory : Setting initial instance status as: STARTING 2019-05-20 17:39:01.804 INFO 7884 --- [ main] com.netflix.discovery.DiscoveryClient : Initializing Eureka in region us-east-1 2019-05-20 17:39:01.806 INFO 7884 --- [ main] com.netflix.discovery.DiscoveryClient : Client configured to neither register nor query for data. 2019-05-20 17:39:01.829 INFO 7884 --- [ main] com.netflix.discovery.DiscoveryClient : Discovery Client initialized at timestamp 1558345141827 with initial instances count: 0 2019-05-20 17:39:01.930 INFO 7884 --- [ main] c.n.eureka.DefaultEurekaServerContext : Initializing ... 2019-05-20 17:39:01.935 WARN 7884 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : The replica size seems to be empty. Check the route 53 DNS Registry 2019-05-20 17:39:01.975 INFO 7884 --- [ main] c.n.e.registry.AbstractInstanceRegistry : Finished initializing remote region registries. All known remote regions: [] 2019-05-20 17:39:01.976 INFO 7884 --- [ main] c.n.eureka.DefaultEurekaServerContext : Initialized 2019-05-20 17:39:02.009 INFO 7884 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 2 endpoint(s) beneath base path '/actuator' 2019-05-20 17:39:02.227 INFO 7884 --- [ main] o.s.c.n.e.s.EurekaServiceRegistry : Registering application service-eureka with eureka with status UP 2019-05-20 17:39:02.235 INFO 7884 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Setting the eureka configuration.. 2019-05-20 17:39:02.237 INFO 7884 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Eureka data center value eureka.datacenter is not set, defaulting to default 2019-05-20 17:39:02.239 INFO 7884 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Eureka environment value eureka.environment is not set, defaulting to test 2019-05-20 17:39:02.269 INFO 7884 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : isAws returned false 2019-05-20 17:39:02.270 INFO 7884 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Initialized server context 2019-05-20 17:39:02.270 INFO 7884 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Got 1 instances from neighboring DS node 2019-05-20 17:39:02.270 INFO 7884 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Renew threshold is: 1 2019-05-20 17:39:02.270 INFO 7884 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Changing status to UP 2019-05-20 17:39:02.272 INFO 7884 --- [ main] com.example.demo.ServletInitializer : Started ServletInitializer in 11.507 seconds (JVM running for 19.123) 2019-05-20 17:39:02.291 INFO 7884 --- [ Thread-13] e.s.EurekaServerInitializerConfiguration : Started Eureka Server 2019-05-20 17:39:02.465 INFO 7884 --- [ main] org.apache.jasper.servlet.TldScanner : 至少有一个JAR被扫描用于TLD但尚未包含TLD。 为此记录器启用调试日志记录，以获取已扫描但未在其中找到TLD的完整JAR列表。 在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。 2019-05-20 17:39:02.690 INFO 7884 --- [ main] c.s.j.s.i.a.WebApplicationImpl : Initiating Jersey application, version 'Jersey: 1.19.1 03/11/2016 02:08 PM' 2019-05-20 17:39:02.885 INFO 7884 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson 2019-05-20 17:39:02.885 INFO 7884 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson 2019-05-20 17:39:02.885 INFO 7884 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml 2019-05-20 17:39:02.885 INFO 7884 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml 2019-05-20 17:39:03.458 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of deployment descriptor [E:\apache-tomcat-9.0.17\conf\Catalina\localhost\eureka.xml] has finished in [18,757] ms 2019-05-20 17:39:03.459 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : 把web 应用程序部署到目录 [E:\apache-tomcat-9.0.17\webapps\docs] 2019-05-20 17:39:03.487 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of web application directory [E:\apache-tomcat-9.0.17\webapps\docs] has finished in [28] ms 2019-05-20 17:39:03.488 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : 把web 应用程序部署到目录 [E:\apache-tomcat-9.0.17\webapps\examples] 2019-05-20 17:39:03.764 INFO 7884 --- [ main] o.a.c.c.C.[.[localhost].[/examples] : ContextListener: contextInitialized() 2019-05-20 17:39:03.764 INFO 7884 --- [ main] o.a.c.c.C.[.[localhost].[/examples] : SessionListener: contextInitialized() 2019-05-20 17:39:03.766 INFO 7884 --- [ main] o.a.c.c.C.[.[localhost].[/examples] : ContextListener: attributeAdded('StockTicker', 'async.Stockticker@60157e9c') 2019-05-20 17:39:03.772 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of web application directory [E:\apache-tomcat-9.0.17\webapps\examples] has finished in [284] ms 2019-05-20 17:39:03.772 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : 把web 应用程序部署到目录 [E:\apache-tomcat-9.0.17\webapps\host-manager] 2019-05-20 17:39:03.805 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of web application directory [E:\apache-tomcat-9.0.17\webapps\host-manager] has finished in [33] ms 2019-05-20 17:39:03.805 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : 把web 应用程序部署到目录 [E:\apache-tomcat-9.0.17\webapps\manager] 2019-05-20 17:39:03.839 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of web application directory [E:\apache-tomcat-9.0.17\webapps\manager] has finished in [34] ms 2019-05-20 17:39:03.840 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : 把web 应用程序部署到目录 [E:\apache-tomcat-9.0.17\webapps\ROOT] 2019-05-20 17:39:03.863 INFO 7884 --- [ main] org.apache.catalina.startup.HostConfig : Deployment of web application directory [E:\apache-tomcat-9.0.17\webapps\ROOT] has finished in [22] ms 2019-05-20 17:39:03.884 INFO 7884 --- [ main] org.apache.coyote.ajp.AjpNioProtocol : 开始协议处理句柄["ajp-nio-8009"] 2019-05-20 17:39:03.892 INFO 7884 --- [ main] org.apache.catalina.startup.Catalina : Server startup in [19,245] milliseconds 2019-05-20 17:39:05.298 INFO 7884 --- [p-nio-80-exec-3] o.a.c.c.C.[.[localhost].[/eureka] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2019-05-20 17:39:05.302 INFO 7884 --- [p-nio-80-exec-3] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2019-05-20 17:39:05.336 INFO 7884 --- [p-nio-80-exec-3] o.s.web.servlet.DispatcherServlet : Completed initialization in 33 ms 2019-05-20 17:39:05.997 ERROR 7884 --- [p-nio-80-exec-3] o.s.b.w.servlet.support.ErrorPageFilter : Cannot forward to error page for request [/] as the response has already been committed. As a result, the response may have the wrong status code. If your application is running on WebSphere Application Server you may be able to resolve this problem by setting com.ibm.ws.webcontainer.invokeFlushAfterService to false ```

刚开始学习springCloud,使用Eureka的时候注册中心启动没有问题,客户端却启动报错,搞了一天还没搞明白,求大神帮忙. 报错信息 ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1254) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$1(AbstractBeanFactory.java:353) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:384) ~[spring-cloud-context-2.0.0.M8.jar:2.0.0.M8] at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:183) ~[spring-cloud-context-2.0.0.M8.jar:2.0.0.M8] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:350) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getTargetObject(EurekaRegistration.java:167) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getEurekaClient(EurekaRegistration.java:156) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:57) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:39) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:80) [spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:52) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:157) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:121) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:885) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at com.dcb.myspringboot.hello.BootDemoApplication.main(BootDemoApplication.java:20) [classes/:na] Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] ... 30 common frames omitted Caused by: java.lang.NoSuchMethodError: com.google.common.collect.MapMaker.keyEquivalence(Lcom/google/common/base/Equivalence;)Lcom/google/common/collect/MapMaker; at com.google.common.collect.Interners$WeakInterner.<init>(Interners.java:68) ~[guava-18.0.jar:na] at com.google.common.collect.Interners$WeakInterner.<init>(Interners.java:66) ~[guava-18.0.jar:na] at com.google.common.collect.Interners.newWeakInterner(Interners.java:63) ~[guava-18.0.jar:na] at com.netflix.servo.tag.Tags.<clinit>(Tags.java:26) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.BasicTimer.<clinit>(BasicTimer.java:36) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.Monitors.newTimer(Monitors.java:87) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.servo.monitor.Monitors.newTimer(Monitors.java:72) ~[servo-core-0.10.1.jar:0.10.1] at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:132) ~[eureka-client-1.8.6.jar:1.8.6] at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:269) ~[eureka-client-1.8.6.jar:1.8.6] at org.springframework.cloud.netflix.eureka.CloudEurekaClient.<init>(CloudEurekaClient.java:63) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:269) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44.CGLIB$eurekaClient$0(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44$$FastClassBySpringCGLIB$$9e5161f9.invoke(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$a2827c44.eurekaClient(<generated>) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.6.RELEASE.jar:5.0.6.RELEASE] ... 31 common frames omitted 2018-06-01 16:12:52.321 WARN 6708 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'eurekaAutoServiceRegistration'; nested exception is java.lang.NullPointerException 2018-06-01 16:12:52.323 WARN 6708 --- [ main] o.s.b.f.support.DisposableBeanAdapter : Invocation of destroy method 'close' failed on bean with name 'eurekaRegistration': org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!) 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Shutdown ignored - container is not active already 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown 2018-06-01 16:12:52.325 INFO 6708 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans 2018-06-01 16:12:52.329 INFO 6708 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2018-06-01 16:12:52.339 INFO 6708 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2018-06-01 16:12:52.343 ERROR 6708 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Failed to start bean 'eurekaAutoServiceRegistration'; nested exception is java.lang.NullPointerException at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:184) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:52) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:157) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:121) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:885) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:161) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE] at com.dcb.myspringboot.hello.BootDemoApplication.main(BootDemoApplication.java:20) [classes/:na] Caused by: java.lang.NullPointerException: null at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:57) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:39) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:80) ~[spring-cloud-netflix-eureka-client-2.0.0.M7.jar:2.0.0.M7] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE] ... 14 common frames omitted ```

配置文件： server.ssl.key-store=classpath:ssl.p12 server.ssl.key-store-password=123 server.ssl.key-store-type=PKCS12 server.ssl.key-alias=knowind ``` 2019-11-15 11:15:25.825 ERROR 8336 --- [ost-startStop-1] s.j.c.l.p.ClassLoaderLeakPreventor : Internal registry of java.beans.PropertyEditorManager not found 2019-11-15 11:15:25.832 INFO 8336 --- [ost-startStop-1] s.j.c.l.p.ClassLoaderLeakPreventor : Releasing web app classloader from Apache Commons Logging 2019-11-15 11:15:25.832 INFO 8336 --- [ main] utoConfigurationReportLoggingInitializer : Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled. 2019-11-15 11:15:25.863 ERROR 8336 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: The Tomcat connector configured to listen on port 9999 failed to start. The port may already be in use or the connector may be misconfigured. Action: Verify the connector's configuration, identify and stop any process that's listening on port 9999, or configure this application to listen on another port. ```

 在.web(true)这里一直报错 web in SpringApplicationBuilder cannot be applied to (boolean)。 完全copy的官方文档，有人能帮忙解答一下为什么报错吗？

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文章目录数据库基础知识为什么要使用数据库什么是SQL？什么是MySQL?数据库三大范式是什么mysql有关权限的表都有哪几个MySQL的binlog有有几种录入格式？分别有什么区别？数据类型mysql有哪些数据类型引擎MySQL存储引擎MyISAM与InnoDB区别MyISAM索引与InnoDB索引的区别？InnoDB引擎的4大特性存储引擎选择索引什么是索引？索引有哪些优缺点？索引使用场景（重点）...

有个好朋友ZS，是技术总监，昨天问我：“有一个老下属，跟了我很多年，做事勤勤恳恳，主动性也很好。但随着公司的发展，他的进步速度，跟不上团队的步伐了，有点...

私下里，有不少读者问我：“二哥，如何才能写出一份专业的技术简历呢？我总感觉自己写的简历太烂了，所以投了无数份，都石沉大海了。”说实话，我自己好多年没有写过简历了，但我认识的一个同行，他在阿里，给我说了一些他当年写简历的方法论，我感觉太牛逼了，实在是忍不住，就分享了出来，希望能够帮助到你。 01、简历的本质 作为简历的撰写者，你必须要搞清楚一点，简历的本质是什么，它就是为了来销售你的价值主张的。往深...

今天给你们讲述一个外包程序员的幸福生活。男主是Z哥，不是在外包公司上班的那种，是一名自由职业者，接外包项目自己干。接下来讲的都是真人真事。 先给大家介绍一下男主，Z哥，老程序员，是我十多年前的老同事，技术大牛，当过CTO，也创过业。因为我俩都爱好喝酒、踢球，再加上住的距离不算远，所以一直也断断续续的联系着，我对Z哥的状况也有大概了解。 Z哥几年前创业失败，后来他开始干起了外包，利用自己的技术能...

作者 |Charles R. Martin译者 | 弯月，责编 | 夕颜头图 |付费下载自视觉中国出品 | CSDN（ID:CSDNnews）新手...

如果世界上都是这种不思进取的软件公司，那别说大部分程序员只会写 3 年代码，恐怕就没有程序员这种职业。

有小伙伴问松哥这个问题，他在上海某公司，在离职了几个月后，前公司的领导联系到他，希望他能够返聘回去，他很纠结要不要回去？ 俗话说好马不吃回头草，但是这个小伙伴既然感到纠结了，我觉得至少说明了两个问题：1.曾经的公司还不错；2.现在的日子也不是很如意。否则应该就不会纠结了。 老实说，松哥之前也有过类似的经历，今天就来和小伙伴们聊聊回头草到底吃不吃。 首先一个基本观点，就是离职了也没必要和老东家弄的苦...

面试官问HTTP与HTTPS的区别，我这样回答让他竖起大拇指！

虽然大公司并不是人人都能进，但我仍建议还未毕业的同学，尽力地通过校招向大公司挤，但凡挤进去，你这一生会容易很多。 大公司哪里好？没能进大公司怎么办？答案都在这里了,记得帮我点赞哦。 目录： 技术氛围 内部晋升与跳槽 啥也没学会，公司倒闭了？ 不同的人脉圈，注定会有不同的结果 没能去大厂怎么办？ 一、技术氛围 纵观整个程序员技术领域，哪个在行业有所名气的大牛，不是在大厂? 而且众所...

往往，我们看不进去大段大段的逻辑。深刻的哲理，往往短而精悍，一阵见血。问：产品经理挺漂亮的，有点心动，但不知道合不合得来。男生更看重女生的身材脸蛋，还是...

本文作者用对比非常鲜明的两个开发团队的故事，讲解了敏捷开发之道 —— 如果你的团队缺乏统一标准的环境，那么即使勤劳努力，不仅会极其耗时而且成果甚微，使用...

二哥，有个事想询问下您的意见，您觉得应届生值得去外包吗？公司虽然挺大的，中xx，但待遇感觉挺低，马上要报到，挺纠结的。

当HR压你价，说你只值7K时，你可以流畅地回答，记住，是流畅，不能犹豫。 礼貌地说：“7K是吗？了解了。嗯~其实我对贵司的面试官印象很好。只不过，现在我的手头上已经有一份11K的offer。来面试，主要也是自己对贵司挺有兴趣的，所以过来看看……”（未完） 这段话主要是陪HR互诈的同时，从公司兴趣，公司职员印象上，都给予对方正面的肯定，既能提升HR的好感度，又能让谈判气氛融洽，为后面的发挥留足空间。...

面试阿里p7被问到的问题(当时我只知道第一个)：@Conditional是做什么的?@Conditional多个条件是什么逻辑关系？条件判断在什么时候执...

终于懂了TCP和UDP协议区别

编程语言层出不穷，从最初的机器语言到如今2500种以上的高级语言，程序员们大呼“学到头秃”。程序员一边面临编程语言不断推陈出新，一边面临由于许多代码已存在，程序员编写新应用程序时存在重复“搬砖”的现象。 无代码/低代码编程应运而生。无代码/低代码是一种创建应用的方法，它可以让开发者使用最少的编码知识来快速开发应用程序。开发者通过图形界面中，可视化建模来组装和配置应用程序。这样一来，开发者直...

最近面试了一个31岁8年经验的程序猿，让我有点感慨，大龄程序猿该何去何从。

说实话，自己的算法，我一个不会，太难了吧

已经连续五年参加大厂校招、社招的技术面试工作，简历看的不下于万份 这篇文章会用实例告诉你，什么是差的程序员简历！ 疫情快要结束了，各个公司也都开始春招了，作为即将红遍大江南北的新晋UP主，那当然要为小伙伴们做点事（手动狗头）。 就在公众号里公开征简历，义务帮大家看，并一一点评。《启舰：春招在即，义务帮大家看看简历吧》 一石激起千层浪，三天收到两百多封简历。 花光了两个星期的所有空闲时...