刚开始学SpringCloud的Eureka带来的问题

报错信息


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.2.6)

2024-06-04T11:20:14.488+08:00  INFO 18700 --- [user-server] [           main] o.h.userserver.UserServerApplication     : Starting UserServerApplication using Java 17.0.10 with PID 18700 (D:\DevCraftOrders\DevCraftOrders\user-server\target\classes started by 汪海洋 in D:\DevCraftOrders\DevCraftOrders)
2024-06-04T11:20:14.490+08:00  INFO 18700 --- [user-server] [           main] o.h.userserver.UserServerApplication     : No active profile set, falling back to 1 default profile: "default"
2024-06-04T11:20:15.262+08:00  INFO 18700 --- [user-server] [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=586ec15a-30c8-3293-b11e-926d2f7ba1c8
2024-06-04T11:20:15.396+08:00  WARN 18700 --- [user-server] [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.client.loadbalancer.LoadBalancerAutoConfiguration$DeferringLoadBalancerInterceptorConfig' of type [org.springframework.cloud.client.loadbalancer.LoadBalancerAutoConfiguration$DeferringLoadBalancerInterceptorConfig] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying). The currently created BeanPostProcessor [lbRestClientPostProcessor] is declared through a non-static factory method on that class; consider declaring it as static instead.
2024-06-04T11:20:15.397+08:00  WARN 18700 --- [user-server] [           main] trationDelegate$BeanPostProcessorChecker : Bean 'deferringLoadBalancerInterceptor' of type [org.springframework.cloud.client.loadbalancer.DeferringLoadBalancerInterceptor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [lbRestClientPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies.
2024-06-04T11:20:15.574+08:00  INFO 18700 --- [user-server] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8081 (http)
2024-06-04T11:20:15.582+08:00  INFO 18700 --- [user-server] [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2024-06-04T11:20:15.582+08:00  INFO 18700 --- [user-server] [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.24]
2024-06-04T11:20:15.633+08:00  INFO 18700 --- [user-server] [           main] o.a.c.c.C.[Tomcat].[localhost].[/user]   : Initializing Spring embedded WebApplicationContext
2024-06-04T11:20:15.633+08:00  INFO 18700 --- [user-server] [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1114 ms
2024-06-04T11:20:16.898+08:00  WARN 18700 --- [user-server] [           main] iguration$LoadBalancerCaffeineWarnLogger : Spring Cloud LoadBalancer is currently working with the default cache. While this cache implementation is useful for development and tests, it's recommended to use Caffeine cache in production.You can switch to using Caffeine cache, by adding it and org.springframework.cache.caffeine.CaffeineCacheManager to the classpath.
2024-06-04T11:20:16.903+08:00  INFO 18700 --- [user-server] [           main] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 1 endpoint(s) beneath base path '/actuator'
2024-06-04T11:20:16.958+08:00  INFO 18700 --- [user-server] [           main] o.s.c.n.eureka.InstanceInfoFactory       : Setting initial instance status as: STARTING
2024-06-04T11:20:16.960+08:00 ERROR 18700 --- [user-server] [           main] o.s.c.n.e.s.EurekaRegistration           : error getting CloudEurekaClient

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Unsatisfied dependency expressed through method 'eurekaClient' parameter 3: No qualifying bean of type 'com.netflix.discovery.shared.transport.jersey.TransportClientFactories<?>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:795) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:542) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1337) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1167) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$1(AbstractBeanFactory.java:376) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:375) ~[spring-cloud-context-4.1.3.jar:4.1.3]
    at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:179) ~[spring-cloud-context-4.1.3.jar:4.1.3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:373) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-6.1.8.jar:6.1.8]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getTargetObject(EurekaRegistration.java:128) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getEurekaClient(EurekaRegistration.java:116) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
    at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:281) ~[spring-core-6.1.8.jar:6.1.8]
    at org.springframework.cloud.context.scope.GenericScope$LockedScopedProxyFactoryBean.invoke(GenericScope.java:482) ~[spring-cloud-context-4.1.3.jar:4.1.3]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.1.8.jar:6.1.8]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768) ~[spring-aop-6.1.8.jar:6.1.8]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:720) ~[spring-aop-6.1.8.jar:6.1.8]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration$$SpringCGLIB$$0.getEurekaClient(<generated>) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:83) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:66) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:89) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:288) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:471) ~[spring-context-6.1.8.jar:6.1.8]
    at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:260) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:205) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:981) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.haiyang.userserver.UserServerApplication.main(UserServerApplication.java:11) ~[classes/:na]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.netflix.discovery.shared.transport.jersey.TransportClientFactories<?>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1880) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1406) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1353) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:904) ~[spring-beans-6.1.8.jar:6.1.8]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:782) ~[spring-beans-6.1.8.jar:6.1.8]
    ... 40 common frames omitted

2024-06-04T11:20:16.965+08:00  WARN 18700 --- [user-server] [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'eurekaAutoServiceRegistration'
2024-06-04T11:20:16.986+08:00  INFO 18700 --- [user-server] [           main] .s.b.a.l.ConditionEvaluationReportLogger : 

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-06-04T11:20:16.998+08:00 ERROR 18700 --- [user-server] [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'eurekaAutoServiceRegistration'
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:291) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:471) ~[spring-context-6.1.8.jar:6.1.8]
    at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:260) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:205) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:981) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627) ~[spring-context-6.1.8.jar:6.1.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.2.6.jar:3.2.6]
    at org.haiyang.userserver.UserServerApplication.main(UserServerApplication.java:11) ~[classes/:na]
Caused by: java.lang.NullPointerException: Cannot invoke "org.springframework.cloud.netflix.eureka.CloudEurekaClient.getApplications()" because the return value of "org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getEurekaClient()" is null
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:83) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:66) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:89) ~[spring-cloud-netflix-eureka-client-4.1.2.jar:4.1.2]
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:288) ~[spring-context-6.1.8.jar:6.1.8]
    ... 13 common frames omitted


Process finished with exit code 1

为了尝试学习Eureka，我建立了如下结构的项目

而eureka我已经配置的服务端可以访问了

配置服务端的yml文件

server:
  port: 8077
  servlet:
    context-path: /
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
spring:
  application:
    name: eureka-server
  config:
    activate:
      on-profile: dev

但是对于客户端我怎么都没办法配置
首先，我在父pom中导入了eureka的客户端依赖

<?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>3.2.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>org.haiyang</groupId>
    <artifactId>DevCraftOrders</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring-cloud.version>2023.0.2</spring-cloud.version>
    </properties>
    <modules>
        <module>eureka-server</module>
        <module>order-server</module>
        <module>user-server</module>
    </modules>

    <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>
    <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>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>annotationProcessor</scope>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter-test</artifactId>
            <version>3.0.3</version>
            <scope>test</scope>
        </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.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

然后利用继承和聚合，所有的子模块都继承了父模块的依赖，也就是说对于其中一个user-server模块来说

<?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.haiyang</groupId>
        <artifactId>DevCraftOrders</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <artifactId>user-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>user-server</name>
    <description>user-server</description>

</project>

但是在user-server模块的启动类中却根本就没有@EnableEurekaClient注解，另外显示子模块maven已经导入了这个模块了

另外user-service的配置是

spring:
  application:
    name: user-service
    version: 1.0.0
  datasource:
    url: jdbc:mysql://39.106.45.185:3306/user_db?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
    username: root
    password: 1234
    driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
  type-aliases-package: org.haiyang.userserver.pojo
  mapper-locations: classpath:mapper/*.xml
server:
  port: 8081
  servlet:
    context-path: /user
eureka:
  client:
#    register-with-eureka: false
#    fetch-registry: false
    instance:
      hostname: 127.0.0.1
      port: 9000
      service-url:
        defaultZone: http://${eureka.instance.hostname}:${eureka.instance.port}/eureka/

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以下内容由CHATGPT及阿里嘎多学长共同生成、有用望采纳：

【解题思路】：检查Eureka配置和网络设置，确保服务注册和发现正常。

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回答 2 已采纳这篇文章：springcloud config配置中心集成GitHub搭建也许能够解决你的问题，你可以看下
刚学习spring cloud，想问下openfeign是如何能够找到注册中心 java 分布式后端
2022-05-04 14:52

回答 2 已采纳你确定刚学怎么用的时候，你就要知道怎么来的吗？？？？入口在EnableFeignClients，核心在import（FeignClientsRegistrar）（自行百度为啥启动会回调到这个类） F
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2301_82242204的博客自我介绍一下，小编13年上海交大毕业，曾经在小公司待过，也去过...因此收集整理了一份《2024年Java开发全套学习资料》，初衷也很简单，就是希望能够帮助到想自学提升又不知道该从何学起的朋友，同时减轻大家的负担。
没有IRule接口咋办啊加Ribbon依赖会报错的 eureka3.0以上版本包括了Ribbon 但没有Ribbon依赖就没有IRule接口啊 eureka ribbon spring cloud
2022-05-15 15:01

回答 3 已采纳如果在使用自定义负载均衡时报错，大概率是因为版本问题。springcloud在2020.0.0之后，移除掉了netflix-ribbon 使用eureka-client中的loadbalancer，使
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weixin_39829574的博客什么是 springcloud?2. 我们为什么使用 SpringCloud?3. 如何使用 SpringCloud? 如何 Quick Start?4. 迁移过程中,老代码使用 springcloud 需要注意哪些坑?1. 什么是微服务? 什么是 springcloud?引用维基百科:微服务...
基于springcloud+MYSQL的大学生在线学习平台的设计与实现-计算机毕业设计源码43038
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vx_danpianji889的博客后台首页：管理员登录后的管理主页，显示系统的重要信息和功能入口。 ... 课程分类管理：管理在线课程的分类...学生提问管理：管理学生在课程学习中的提问，包括回复问题和解决问题等。提问回复管理：管理学生提问.....
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