eclipse导入maven web项目报错

图片说明

8个回答

jar包没有下载下来,右键项目maven build ,在Goals中输入 clean compile  ,然后点击Run,就开始下载jar包。
如果下载jar很慢,可以将maven中心仓库地址改为阿里云maven[](http://www.cnblogs.com/geektown/p/5705405.html "")
如果还是报jar包有问题,就去本地maven仓库将commons-collections全部删除,然后重复上面步骤
上面方法一定能解决

图片说明

图片说明

去你本地的maven仓库,找到commons-collections相关文件,删除所有.lastupdate文件,然后在你eclipse找到对应项目右键选maven->update project

找到对应项目右键选maven->update project>勾选Force update.....就可以了

这是因为下载不了maven库的jar,第一保证网络是可访问的,
第二删除maven参数你内容,然后更新maven项目即可
右键maven-update project-勾选项目和Force update

alibaba有个仓库,速度很不错,修改一下maven的中央仓库配置

说说我最后的解决方案吧,以便后来者查询。
我清空了本地仓库的所有jar包
删除项目后重新导入项目
然后这个错误就没了

Csdn user default icon
上传中...
上传图片
插入图片
抄袭、复制答案,以达到刷声望分或其他目的的行为,在CSDN问答是严格禁止的,一经发现立刻封号。是时候展现真正的技术了!
其他相关推荐
请教有人知道:eclipse导入maven工程,eclipse报错如下:
An internal error occurred during: "Loading descriptor for poms-web.". org.eclipse.emf.ecore.xmi.FeatureNotFoundException: Feature 'async-supported' not found. (platform:/resource/poms-web/src/main/webapp/WEB-INF/web.xml, 80, 20)
intellij idea导入eclipse创建的maven web项目 jar包导入总是报错
** 软件环境**: spring+springMVC+mybatis+ mysql; tomcat服务器; maven项目 eclipse工具运行正常; **问题描述:** maven的jar包依赖没有导入成功,maven配置正常 沿用了阿里云的中心库eclipse可用; 报错截图1: ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542032523_181718.png) ``` nformation:java: Errors occurred while compiling module 'miaolanghzong' Information:Eclipse compiler 4.7.2 was used to compile java sources Information:2018/11/12 21:56 - Compilation completed with 133 errors and 418 warnings in 29 s 620 ms D:\career\workspaceTest2\erzhentang\src\main\java\com\app\totalController\MemberBusinessController.java Error:Error:line (1)java: Syntax error on token "Invalid Character", delete this token Error:Error:line (13)java: The import javax.servlet.http.HttpServletRequest cannot be resolved Error:Error:line (14)java: The import javax.servlet.http.HttpServletResponse cannot be resolved Error:Error:line (47)java: The import com.google.gson cannot be resolved Error:Error:line (659)java: HttpServletRequest cannot be resolved to a type Error:Error:line (659)java: HttpServletResponse cannot be resolved to a type Error:Error:line (623)java: HttpServletRequest cannot be resolved to a type Error:Error:line (623)java: HttpServletResponse cannot be resolved to a type Error:Error:line (894)java: HttpServletRequest cannot be resolved to a type Error:Error:line (894)java: HttpServletResponse cannot be resolved to a type Error:Error:line (806)java: HttpServletRequest cannot be resolved to a type Error:Error:line (806)java: HttpServletResponse cannot be resolved to a type Error:Error:line (198)java: HttpServletRequest cannot be resolved to a type Error:Error:line (198)java: HttpServletResponse cannot be resolved to a type Error:Error:line (277)java: HttpServletRequest cannot be resolved to a type Error:Error:line (277)java: HttpServletResponse cannot be resolved to a type Error:Error:line (134)java: HttpServletRequest cannot be resolved to a type Error:Error:line (134)java: HttpServletResponse cannot be resolved to a type Error:Error:line (460)java: HttpServletRequest cannot be resolved to a type Error:Error:line (460)java: HttpServletResponse cannot be resolved to a type Error:Error:line (540)java: HttpServletRequest cannot be resolved to a type Error:Error:line (540)java: HttpServletResponse cannot be resolved to a type Error:Error:line (109)java: HttpServletRequest cannot be resolved to a type Error:Error:line (109)java: HttpServletResponse cannot be resolved to a type Error:Error:line (411)java: HttpServletRequest cannot be resolved to a type Error:Error:line (411)java: HttpServletResponse cannot be resolved to a type Warning:Warning:line (114)java: The static method sendCode(java.lang.String) from the type com.app.util.Alidayu should be accessed in a static way Warning:Warning:line (154)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way Warning:Warning:line (207)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way Warning:Warning:line (286)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way Warning:Warning:line (421)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way Warning:Warning:line (469)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way Warning:Warning:line (549)java: The static method md5Encode(java.lang.String) from the type com.app.util.MD5Util should be accessed in a static way D:\career\workspaceTest2\erzhentang\src\main\java\com\app\common\LoginFilter.java Error:Error:line (23)java: Filter cannot be resolved to a type Error:Error:line (37)java: ServletException cannot be resolved to a type Error:Error:line (36)java: ServletRequest cannot be resolved to a type Error:Error:line (36)java: ServletResponse cannot be resolved to a type Error:Error:line (37)java: FilterChain cannot be resolved to a type Error:Error:line (106)java: ServletException cannot be resolved to a type Error:Error:line (106)java: FilterConfig cannot be resolved to a type Error:Error:line (7)java: The import javax.servlet.Filter cannot be resolved Error:Error:line (8)java: The import javax.servlet.FilterChain cannot be resolved Error:Error:line (9)java: The import javax.servlet.FilterConfig cannot be resolved Error:Error:line (10)java: The import javax.servlet.ServletException cannot be resolved Error:Error:line (11)java: The import javax.servlet.ServletRequest cannot be resolved Error:Error:line (12)java: The import javax.servlet.ServletResponse cannot be resolved Error:Error:line (13)java: The import javax.servlet.http.HttpServletRequest cannot be resolved Error:Error:line (14)java: The import javax.servlet.http.HttpServletResponse cannot be resolved Error:Error:line (15)java: The import javax.servlet.http.HttpSession cannot be resolved Error:Error:line (24)java: FilterConfig cannot be resolved to a type Warning:Warning:line (26)java: java.util.List is a raw type. References to generic type java.util.List<E> should be parameterized Warning:Warning:line (28)java: java.util.List is a raw type. References to generic type java.util.List<E> should be parameterized Error:Error:line (33)java: FilterConfig cannot be resolved to a type Error:Error:line (39)java: HttpServletRequest cannot be resolved to a type Error:Error:line (39)java: HttpServletRequest cannot be resolved to a type Error:Error:line (40)java: HttpServletResponse cannot be resolved to a type Error:Error:line (40)java: HttpServletResponse cannot be resolved to a type Error:Error:line (41)java: HttpSession cannot be resolved to a type Error:Error:line (107)java: FilterConfig cannot be resolved to a type Error:Error:line (108)java: FilterConfig cannot be resolved to a type Error:Error:line (113)java: FilterConfig cannot be resolved to a type D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\impl\MemberDaoImpl.java Warning:Warning:line (42)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (63)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (110)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (9)java: The import com.app.bean.Menu is never used D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\impl\EarProblemDaoImpl.java Warning:Warning:line (18)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (48)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\impl\BodyConclusionDaoImpl.java Warning:Warning:line (25)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (11)java: The import com.app.bean.BodyConclusionWuxing is never used D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\mapper\EarDisease100Mapper.java Warning:Warning:line (14)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\BlueToochMacDao.java Warning:Warning:line (12)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized Warning:Warning:line (14)java: java.util.Map is a raw type. References to generic type java.util.Map<K,V> should be parameterized D:\career\workspaceTest2\erzhentang\src\main\java\com\app\dao\EarScanC ``` ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031436_513761.png) ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031687_784746.png) ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031723_457809.png) ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031745_434340.png) ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031762_172605.png) ![图片说明](https://img-ask.csdn.net/upload/201811/12/1542031776_649119.png)
jenkins部署maven工程构建,报错“package org.springframework.web.bind.annotation does not exist”
【背景】: 1、jenkins部署maven工程做自动编译打包构建 2、工程集成了spring+springboot+mybatis 3、多模块方式部署maven工程,有一个总的pom工程。 4、总的pom工程由上游依赖(已install到仓库中) 【问题描述】: 构建此pom工程给多模块编译打包,报错 ``` ...I18nController.java:package org.springframework.web.bind.annotation does not exist. ...I18nController.java ..cannot find symbol.. ... ``` 【定位】: 1、初步排查应该是缺包导致的问题,根据代码报错找到为导入包为spring-web中的一个类找不到 2、因为继承jenkins构建使用的maven未配置localRepository,因此构建时下载的临时仓库在slave的WORKSPACE下的m2chche目录下。 3、可以明确在该m2chche种找到spring-web对应版本已下载的jar包。 4、在jenkins执行日志中,搜索加载到的"org/springframework/spring"时,其他的spring-jdbc,spring-tx,spring-core,spring-aop等包都能查到,但是查不到spring-web的。 5、根据spring boot的pom文件往上找依赖,在spring-boot-starter 找到spring-boot-starter-web,在往上找到spring-web的依赖,scope配置的 compile 至此暂没有头绪了。 【求助】:请教大家了解maven的朋友,给点指导,谢谢!
在IDEA导入Gradle项目之后一直报错
代码用的Spring Boot+ MyBatis 导入后一直报如下错误 ``` Could not find org.springframework.boot:spring-boot-gradle-plugin:1.5.7.RELEASE. Searched in the following locations: http://maven.aliyun.com/nexus/content/groups/public/org/springframework/boot/spring-boot-gradle-plugin/1.5.7.RELEASE/spring-boot-gradle-plugin-1.5.7.RELEASE.pom http://maven.aliyun.com/nexus/content/groups/public/org/springframework/boot/spring-boot-gradle-plugin/1.5.7.RELEASE/spring-boot-gradle-plugin-1.5.7.RELEASE.jar Required by: project : ``` Gradle相关配置如下 ``` apply plugin: 'java' apply plugin: 'eclipse-wtp' apply plugin: 'org.springframework.boot' if (!DEVELOP_MODE.toBoolean()) { apply plugin: 'war' } group = 'com.server' version = '0.0.1-SNAPSHOT' sourceCompatibility = 1.8 repositories { maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' } } configurations { providedRuntime } dependencies { compile('org.springframework.boot:spring-boot-starter-aop') compile('org.springframework.boot:spring-boot-starter-data-jpa') compile('org.springframework.boot:spring-boot-starter-jdbc') compile('org.springframework.boot:spring-boot-starter-web') compile('org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.1') compile "org.springframework.boot:spring-boot-starter-thymeleaf" runtime('mysql:mysql-connector-java') if (!DEVELOP_MODE.toBoolean()) { providedRuntime('org.springframework.boot:spring-boot-starter-tomcat') } testCompile('org.springframework.boot:spring-boot-starter-test') } ```
我在开源社区下载了一个权限系统的maven工程,但是遇到的问题无法解决
我先说一下我的工作环境: eclipse10,maven3.3.1,jdk1.7,Tomcat7,数据库用的是mysql 项目下载网址:https://github.com/Jdoing/myweb 博客网址:http://lib.csdn.net/article/java/2933 我刚下载的时候还不能直接部署到Tomcat7,后来我就把导入的maven项目转成web项目了,可以成功部署了,但是却遇到了下面几个问题: 1、我把导入的项目转成web项目,但是很多js插件报错,而且经常跳出下面这个错误Errors occurred during the build.Errors running builder 'Maven Project Builder' on project 'myweb'.8194 2、我用maven install打包的时候出现错误,有可能是第一个错误引起的,导致无法打成war包 3、第一次接触maven项目,不知道具体本地访问项目组jsp页面的访问路径。 本人小白,第一次接触maven项目,遇到问题百度了好久都没有解决,所以在这里向各位大神求助,谢谢。
eclipse多模块项目,导入idea无法启动,已经整了好几天了......请问怎么回事?
是一个多模块的maven项目,在eclipse创建,导入idea后无法启动, 尝试过了网上的一些解决方法,比如在web.xml配置如下 ``` <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-config.xml</param-value> </context-param> ``` 但是依然无法解决。。。。。 报错信息如下 ![图片说明](https://img-ask.csdn.net/upload/201904/24/1556078811_22164.png) 跪求各路idea大神前来解决!谢了
maven 运行项目 404 求大佬指教啊 百度了很多 都不行
console报错 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [spring-mybatis.xml]; nested exception is java.io.FileNotFoundException: class path resource [spring-mybatis.xml] cannot be opened because it does not exist at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:344) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:609) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:510) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.io.FileNotFoundException: class path resource [spring-mybatis.xml] cannot be opened because it does not exist at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:330) ... 21 more 九月 16, 2018 11:34:24 上午 org.apache.catalina.core.StandardContext startInternal 严重: One or more listeners failed to start. Full details will be found in the appropriate container log file 九月 16, 2018 11:34:24 上午 org.apache.catalina.core.StandardContext startInternal 严重: Context [/SSM] startup failed due to previous errors 九月 16, 2018 11:34:24 上午 org.apache.catalina.core.ApplicationContext log 信息: Closing Spring root WebApplicationContext 九月 16, 2018 11:34:24 上午 org.apache.catalina.core.StandardContext listenerStop 严重: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:170) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1006) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:982) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:934) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:581) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:116) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4900) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5537) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:221) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:149) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 九月 16, 2018 11:34:24 上午 org.apache.coyote.AbstractProtoco 百度了很多 都说是jar包的关系 jar包是导入了啊 看了G:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\ 文件下面jar包也存在 大佬求指教
SSH项目发布启动后报错
一个SSH的项目,用Eclipse新建了一个工程,把原有的项目的.settings、src、web、java_test 四个文件覆盖了进去,项目没有报错,然后发布启动后404无法访问,日志如下,\web\WEB-INF\lib下的jar包我已经全部导入了,我查好像是说spring-web这个包没找到,但是我已经导进去了,刚参加工作不久经验太少了,求大神帮忙看看是什么问题 ``` 八月 03, 2015 10:31:23 上午 org.apache.catalina.core.AprLifecycleListener init 信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre1.8.0_45\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_45/bin/server;C:/Program Files/Java/jre1.8.0_45/bin;C:/Program Files/Java/jre1.8.0_45/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;C:\Program Files (x86)\Java\jdk1.8.0_45\bin;C:\Program Files (x86)\Java\jdk1.8.0_45\db\bin;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\Java\jdk1.8.0_45\bin;D:\Maven\apache-maven-3.3.3\bin;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;D:\Eclipse;;. 八月 03, 2015 10:31:23 上午 org.apache.tomcat.util.digester.SetPropertiesRule begin 警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:CasJob' did not find a matching property. 八月 03, 2015 10:31:23 上午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["http-bio-8080"] 八月 03, 2015 10:31:23 上午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["ajp-bio-8009"] 八月 03, 2015 10:31:23 上午 org.apache.catalina.startup.Catalina load 信息: Initialization processed in 722 ms 八月 03, 2015 10:31:23 上午 org.apache.catalina.core.StandardService startInternal 信息: Starting service Catalina 八月 03, 2015 10:31:23 上午 org.apache.catalina.core.StandardEngine startInternal 信息: Starting Servlet Engine: Apache Tomcat/7.0.42 八月 03, 2015 10:31:28 上午 org.apache.catalina.startup.TaglibUriRule body 信息: TLD skipped. URI: http://www.extremecomponents.org is already defined 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Error configuring application listener of class org.apache.catalina.deploy.ApplicationListener@601ba7cb java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4854) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Error configuring application listener of class org.apache.catalina.deploy.ApplicationListener@730287da java.lang.ClassNotFoundException: org.springframework.web.context.request.RequestContextListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4854) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Error configuring application listener of class org.apache.catalina.deploy.ApplicationListener@478f3763 java.lang.ClassNotFoundException: org.springframework.web.util.IntrospectorCleanupListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4854) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext listenerStart 严重: Skipped installing application listeners due to previous error(s) 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext startInternal 严重: Error listenerStart 八月 03, 2015 10:31:28 上午 org.apache.catalina.util.SessionIdGenerator createSecureRandom 信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [205] milliseconds. 八月 03, 2015 10:31:28 上午 org.apache.catalina.core.StandardContext startInternal 严重: Context [/CasJob] startup failed due to previous errors 八月 03, 2015 10:31:28 上午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory C:\xampp\tomcat\webapps\docs 八月 03, 2015 10:31:28 上午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory C:\xampp\tomcat\webapps\examples 八月 03, 2015 10:31:29 上午 org.apache.catalina.core.ApplicationContext log 信息: ContextListener: contextInitialized() 八月 03, 2015 10:31:29 上午 org.apache.catalina.core.ApplicationContext log 信息: SessionListener: contextInitialized() 八月 03, 2015 10:31:29 上午 org.apache.catalina.core.ApplicationContext log 信息: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@1221e05a') 八月 03, 2015 10:31:29 上午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory C:\xampp\tomcat\webapps\host-manager 八月 03, 2015 10:31:29 上午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory C:\xampp\tomcat\webapps\manager 八月 03, 2015 10:31:29 上午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory C:\xampp\tomcat\webapps\ROOT 八月 03, 2015 10:31:29 上午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["http-bio-8080"] 八月 03, 2015 10:31:29 上午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["ajp-bio-8009"] 八月 03, 2015 10:31:29 上午 org.apache.catalina.startup.Catalina start 信息: Server startup in 5474 ms ```
spring boot 工程启动报错
正学习使用spring boot,创建了web工程,按照教程的例子,创建了helloword工程,启动后正常,可以正常访问。 然后我添加了jpa和mysql的依赖,工程就起不来了,报错缺类,但是这个类明明在工程的maven库中啊。 我把别人网上的项目下载,然后导入到我的eclipse,启动时也要报这个相同的错误。 jdk1.8,maven3.5 ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/annotations/common/reflection/ClassLoaderDelegate at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1081) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:856) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE] at com.vodcod.Talent2Application.main(Talent2Application.java:10) [classes/:na] Caused by: java.lang.NoClassDefFoundError: org/hibernate/annotations/common/reflection/ClassLoaderDelegate at org.hibernate.boot.internal.MetadataBuilderImpl.<init>(MetadataBuilderImpl.java:127) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.boot.MetadataSources.getMetadataBuilder(MetadataSources.java:135) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:185) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:149) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:54) ~[spring-orm-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353) ~[spring-orm-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370) ~[spring-orm-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359) ~[spring-orm-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE] ... 16 common frames omitted Caused by: java.lang.ClassNotFoundException: org.hibernate.annotations.common.reflection.ClassLoaderDelegate at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_102] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_102] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_102] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_102] ... 26 common frames omitted ``` ```
Springboot刚启动就报内存溢出?
1.问题描述: 本地系统是Ubuntu,jdk1.8,工具是eclipse,新创建的最简单的springboot项目,其中只导入了web、config的包。 只写了一个controller,启动就会报错。 Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.201-b09 mixed mode): "DestroyJavaVM" #39 prio=5 os_prio=0 tid=0x00007f0ae800f000 nid=0x697c waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "http-nio-8080-Acceptor-0" #37 daemon prio=5 os_prio=0 tid=0x00007f0ae8224800 nid=0x69ae runnable [0x00007f0ac26ed000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422) at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250) - locked <0x000000076f448c40> (a java.lang.Object) at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:448) at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:70) at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:95) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-ClientPoller-1" #36 daemon prio=5 os_prio=0 tid=0x00007f0ae821f000 nid=0x69ad runnable [0x00007f0ac27ee000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269) at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86) - locked <0x000000076f5c05c0> (a sun.nio.ch.Util$3) - locked <0x000000076f5c05b0> (a java.util.Collections$UnmodifiableSet) - locked <0x000000076f5c0498> (a sun.nio.ch.EPollSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97) at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:743) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-ClientPoller-0" #35 daemon prio=5 os_prio=0 tid=0x00007f0ae821d000 nid=0x69ac runnable [0x00007f0ac28ef000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269) at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86) - locked <0x000000076f5afb78> (a sun.nio.ch.Util$3) - locked <0x000000076f5afb68> (a java.util.Collections$UnmodifiableSet) - locked <0x000000076f5afa50> (a sun.nio.ch.EPollSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97) at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:743) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-10" #34 daemon prio=5 os_prio=0 tid=0x00007f0ae82b5800 nid=0x69ab waiting on condition [0x00007f0ac29f0000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-9" #33 daemon prio=5 os_prio=0 tid=0x00007f0ae82b4000 nid=0x69aa waiting on condition [0x00007f0ac2af1000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-8" #32 daemon prio=5 os_prio=0 tid=0x00007f0ae82b2000 nid=0x69a9 waiting on condition [0x00007f0ac2bf2000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-7" #31 daemon prio=5 os_prio=0 tid=0x00007f0ae82b0000 nid=0x69a8 waiting on condition [0x00007f0ac2cf3000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-6" #30 daemon prio=5 os_prio=0 tid=0x00007f0ae82ae000 nid=0x69a7 waiting on condition [0x00007f0ac2df4000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-5" #29 daemon prio=5 os_prio=0 tid=0x00007f0ae8256800 nid=0x69a6 waiting on condition [0x00007f0ac2ef5000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-4" #28 daemon prio=5 os_prio=0 tid=0x00007f0ae8254800 nid=0x69a5 waiting on condition [0x00007f0ac2ff6000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-3" #27 daemon prio=5 os_prio=0 tid=0x00007f0ae8252800 nid=0x69a4 waiting on condition [0x00007f0ac30f7000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-2" #26 daemon prio=5 os_prio=0 tid=0x00007f0ae8251000 nid=0x69a3 waiting on condition [0x00007f0ac31f8000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "http-nio-8080-exec-1" #25 daemon prio=5 os_prio=0 tid=0x00007f0ae824f800 nid=0x69a2 waiting on condition [0x00007f0ac32f9000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076f59e010> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107) at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "NioBlockingSelector.BlockPoller-1" #24 daemon prio=5 os_prio=0 tid=0x00007f0ae82e3800 nid=0x69a1 runnable [0x00007f0ac33fa000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269) at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86) - locked <0x000000076f44a298> (a sun.nio.ch.Util$3) - locked <0x000000076f44a210> (a java.util.Collections$UnmodifiableSet) - locked <0x000000076f44a090> (a sun.nio.ch.EPollSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97) at org.apache.tomcat.util.net.NioBlockingSelector$BlockPoller.run(NioBlockingSelector.java:304) "spring.cloud.inetutils" #23 daemon prio=5 os_prio=0 tid=0x00007f0ae82fb800 nid=0x69a0 waiting on condition [0x00007f0ac34fb000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x000000076e593b10> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) "SimplePauseDetectorThread_0" #22 daemon prio=9 os_prio=0 tid=0x00007f0a84015000 nid=0x699f waiting on condition [0x00007f0ac37fc000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at java.lang.Thread.sleep(Thread.java:340) at java.util.concurrent.TimeUnit.sleep(TimeUnit.java:386) at org.LatencyUtils.TimeServices.sleepNanos(TimeServices.java:62) at org.LatencyUtils.SimplePauseDetector$SimplePauseDetectorThread.run(SimplePauseDetector.java:116) "Thread-4" #21 daemon prio=9 os_prio=0 tid=0x00007f0a84011800 nid=0x699e waiting on condition [0x00007f0ac38fd000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000006c7b7a928> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.LatencyUtils.PauseDetector$PauseDetectorThread.run(PauseDetector.java:85) "container-0" #20 prio=5 os_prio=0 tid=0x00007f0ae8c72800 nid=0x699d waiting on condition [0x00007f0ac39fe000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at org.apache.catalina.core.StandardServer.await(StandardServer.java:568) at org.springframework.boot.web.embedded.tomcat.TomcatWebServer$1.run(TomcatWebServer.java:181) "Catalina-utility-2" #19 prio=1 os_prio=0 tid=0x00007f0a68314800 nid=0x699c waiting on condition [0x00007f0ac8dfd000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000006c7ab4300> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "Catalina-utility-1" #18 prio=1 os_prio=0 tid=0x00007f0ae8c6a800 nid=0x699b waiting on condition [0x00007f0ad0143000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000006c7ab4300> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) "RMI TCP Accept-0" #13 daemon prio=5 os_prio=0 tid=0x00007f0ae850a000 nid=0x6995 runnable [0x00007f0ad056d000] java.lang.Thread.State: RUNNABLE at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409) at java.net.ServerSocket.implAccept(ServerSocket.java:545) at java.net.ServerSocket.accept(ServerSocket.java:513) at sun.management.jmxremote.LocalRMIServerSocketFactory$1.accept(LocalRMIServerSocketFactory.java:52) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:405) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:377) at java.lang.Thread.run(Thread.java:748) "RMI TCP Accept-43459" #12 daemon prio=5 os_prio=0 tid=0x00007f0ae84ca000 nid=0x6994 runnable [0x00007f0ad0694000] java.lang.Thread.State: RUNNABLE at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409) at java.net.ServerSocket.implAccept(ServerSocket.java:545) at java.net.ServerSocket.accept(ServerSocket.java:513) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:405) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:377) at java.lang.Thread.run(Thread.java:748) "RMI TCP Accept-0" #11 daemon prio=5 os_prio=0 tid=0x00007f0ae84b5000 nid=0x6993 runnable [0x00007f0ad0795000] java.lang.Thread.State: RUNNABLE at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409) at java.net.ServerSocket.implAccept(ServerSocket.java:545) at java.net.ServerSocket.accept(ServerSocket.java:513) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:405) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:377) at java.lang.Thread.run(Thread.java:748) "Service Thread" #9 daemon prio=9 os_prio=0 tid=0x00007f0ae80d8000 nid=0x6992 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C1 CompilerThread3" #8 daemon prio=9 os_prio=0 tid=0x00007f0ae80cc800 nid=0x6991 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread2" #7 daemon prio=9 os_prio=0 tid=0x00007f0ae80ca800 nid=0x6990 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007f0ae80c9000 nid=0x698f waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x00007f0ae80c6000 nid=0x698e waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" #4 daemon prio=9 os_prio=0 tid=0x00007f0ae80c4800 nid=0x698d waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007f0ae8091800 nid=0x698c in Object.wait() [0x00007f0ad26de000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000006c701d718> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144) - locked <0x00000006c701d718> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216) "Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00007f0ae808f000 nid=0x698b in Object.wait() [0x00007f0ad27df000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000006c7034928> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:502) at java.lang.ref.Reference.tryHandlePending(Reference.java:191) - locked <0x00000006c7034928> (a java.lang.ref.Reference$Lock) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153) "VM Thread" os_prio=0 tid=0x00007f0ae8085800 nid=0x698a runnable "GC task thread#0 (ParallelGC)" os_prio=0 tid=0x00007f0ae8025000 nid=0x6980 runnable "GC task thread#1 (ParallelGC)" os_prio=0 tid=0x00007f0ae8026800 nid=0x6981 runnable "GC task thread#2 (ParallelGC)" os_prio=0 tid=0x00007f0ae8028800 nid=0x6982 runnable "GC task thread#3 (ParallelGC)" os_prio=0 tid=0x00007f0ae802a000 nid=0x6983 runnable "GC task thread#4 (ParallelGC)" os_prio=0 tid=0x00007f0ae802c000 nid=0x6984 runnable "GC task thread#5 (ParallelGC)" os_prio=0 tid=0x00007f0ae802d800 nid=0x6987 runnable "GC task thread#6 (ParallelGC)" os_prio=0 tid=0x00007f0ae802f800 nid=0x6988 runnable "GC task thread#7 (ParallelGC)" os_prio=0 tid=0x00007f0ae8031000 nid=0x6989 runnable "VM Periodic Task Thread" os_prio=0 tid=0x00007f0ae850c000 nid=0x6996 waiting on condition JNI global references: 1235 Heap PSYoungGen total 144384K, used 45005K [0x000000076d000000, 0x0000000777b00000, 0x00000007c0000000) eden space 126976K, 35% used [0x000000076d000000,0x000000076fbf3608,0x0000000774c00000) from space 17408K, 0% used [0x0000000775d00000,0x0000000775d00000,0x0000000776e00000) to space 17408K, 0% used [0x0000000774c00000,0x0000000774c00000,0x0000000775d00000) ParOldGen total 175616K, used 22110K [0x00000006c7000000, 0x00000006d1b80000, 0x000000076d000000) object space 175616K, 12% used [0x00000006c7000000,0x00000006c85978a8,0x00000006d1b80000) Metaspace used 35192K, capacity 37248K, committed 37504K, reserved 1081344K class space used 4819K, capacity 5214K, committed 5248K, reserved 1048576K 2019-04-01 14:22:57.992 INFO 27001 --- [on(2)-127.0.0.1] inMXBeanRegistrar$SpringApplicationAdmin : Application shutdown requested. 2019-04-01 14:22:57.994 INFO 27001 --- [on(2)-127.0.0.1] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor' 2019-04-01 14:22:58.004 INFO 27001 --- [on(2)-127.0.0.1] o.apache.catalina.core.StandardService : Stopping service [Tomcat] ``` ```
在中国程序员是青春饭吗?
今年,我也32了 ,为了不给大家误导,咨询了猎头、圈内好友,以及年过35岁的几位老程序员……舍了老脸去揭人家伤疤……希望能给大家以帮助,记得帮我点赞哦。 目录: 你以为的人生 一次又一次的伤害 猎头界的真相 如何应对互联网行业的「中年危机」 一、你以为的人生 刚入行时,拿着傲人的工资,想着好好干,以为我们的人生是这样的: 等真到了那一天,你会发现,你的人生很可能是这样的: ...
《MySQL 性能优化》之理解 MySQL 体系结构
本文介绍 MySQL 的体系结构,包括物理结构、逻辑结构以及插件式存储引擎。
【资源】一个C/C++开发工程师的学习路线(已经无路可退,唯有逆风飞翔)【内附资源页】
声明: 1)该文章整理自网上的大牛和专家无私奉献的资料,具体引用的资料请看参考文献。 2)本文仅供学术交流,非商用。所以每一部分具体的参考资料并没有详细对应。如果某部分不小心侵犯了大家的利益,还望海涵,并联系博主删除。 3)博主才疏学浅,文中如有不当之处,请各位指出,共同进步,谢谢。 4)此属于第一版本,若有错误,还需继续修正与增删。还望大家多多指点。大家都共享一点点,一起为祖国科研的推进...
程序员请照顾好自己,周末病魔差点一套带走我。
程序员在一个周末的时间,得了重病,差点当场去世,还好及时挽救回来了。
20道你必须要背会的微服务面试题,面试一定会被问到
写在前面: 在学习springcloud之前大家一定要先了解下,常见的面试题有那块,然后我们带着问题去学习这个微服务技术,那么就会更加理解springcloud技术。如果你已经学了springcloud,那么在准备面试的时候,一定要看看看这些面试题。 文章目录1、什么是微服务?2、微服务之间是如何通讯的?3、springcloud 与dubbo有哪些区别?4、请谈谈对SpringBoot 和S...
达摩院十大科技趋势发布:2020 非同小可!
【CSDN编者按】1月2日,阿里巴巴发布《达摩院2020十大科技趋势》,十大科技趋势分别是:人工智能从感知智能向认知智能演进;计算存储一体化突破AI算力瓶颈;工业互联网的超融合;机器间大规模协作成为可能;模块化降低芯片设计门槛;规模化生产级区块链应用将走入大众;量子计算进入攻坚期;新材料推动半导体器件革新;保护数据隐私的AI技术将加速落地;云成为IT技术创新的中心 。 新的画卷,正在徐徐展开。...
轻松搭建基于 SpringBoot + Vue 的 Web 商城应用
首先介绍下在本文出现的几个比较重要的概念: 函数计算(Function Compute): 函数计算是一个事件驱动的服务,通过函数计算,用户无需管理服务器等运行情况,只需编写代码并上传。函数计算准备计算资源,并以弹性伸缩的方式运行用户代码,而用户只需根据实际代码运行所消耗的资源进行付费。Fun: Fun 是一个用于支持 Serverless 应用部署的工具,能帮助您便捷地管理函数计算、API ...
Python+OpenCV实时图像处理
目录 1、导入库文件 2、设计GUI 3、调用摄像头 4、实时图像处理 4.1、阈值二值化 4.2、边缘检测 4.3、轮廓检测 4.4、高斯滤波 4.5、色彩转换 4.6、调节对比度 5、退出系统 初学OpenCV图像处理的小伙伴肯定对什么高斯函数、滤波处理、阈值二值化等特性非常头疼,这里给各位分享一个小项目,可通过摄像头实时动态查看各类图像处理的特点,也可对各位调参、测试...
2020年一线城市程序员工资大调查
人才需求 一线城市共发布岗位38115个,招聘120827人。 其中 beijing 22805 guangzhou 25081 shanghai 39614 shenzhen 33327 工资分布 2020年中国一线城市程序员的平均工资为16285元,工资中位数为14583元,其中95%的人的工资位于5000到20000元之间。 和往年数据比较: yea...
为什么猝死的都是程序员,基本上不见产品经理猝死呢?
相信大家时不时听到程序员猝死的消息,但是基本上听不到产品经理猝死的消息,这是为什么呢? 我们先百度搜一下:程序员猝死,出现将近700多万条搜索结果: 搜索一下:产品经理猝死,只有400万条的搜索结果,从搜索结果数量上来看,程序员猝死的搜索结果就比产品经理猝死的搜索结果高了一倍,而且从下图可以看到,首页里面的五条搜索结果,其实只有两条才是符合条件。 所以程序员猝死的概率真的比产品经理大,并不是错...
害怕面试被问HashMap?这一篇就搞定了!
声明:本文以jdk1.8为主! 搞定HashMap 作为一个Java从业者,面试的时候肯定会被问到过HashMap,因为对于HashMap来说,可以说是Java集合中的精髓了,如果你觉得自己对它掌握的还不够好,我想今天这篇文章会非常适合你,至少,看了今天这篇文章,以后不怕面试被问HashMap了 其实在我学习HashMap的过程中,我个人觉得HashMap还是挺复杂的,如果真的想把它搞得明明白...
毕业5年,我问遍了身边的大佬,总结了他们的学习方法
我问了身边10个大佬,总结了他们的学习方法,原来成功都是有迹可循的。
python爬取百部电影数据,我分析出了一个残酷的真相
2019年就这么匆匆过去了,就在前几天国家电影局发布了2019年中国电影市场数据,数据显示去年总票房为642.66亿元,同比增长5.4%;国产电影总票房411.75亿元,同比增长8.65%,市场占比 64.07%;城市院线观影人次17.27亿,同比增长0.64%。 看上去似乎是一片大好对不对?不过作为一名严谨求实的数据分析师,我从官方数据中看出了一点端倪:国产票房增幅都已经高达8.65%了,为什...
推荐10个堪称神器的学习网站
每天都会收到很多读者的私信,问我:“二哥,有什么推荐的学习网站吗?最近很浮躁,手头的一些网站都看烦了,想看看二哥这里有什么新鲜货。” 今天一早做了个恶梦,梦到被老板辞退了。虽然说在我们公司,只有我辞退老板的份,没有老板辞退我这一说,但是还是被吓得 4 点多都起来了。(主要是因为我掌握着公司所有的核心源码,哈哈哈) 既然 4 点多起来,就得好好利用起来。于是我就挑选了 10 个堪称神器的学习网站,推...
这些软件太强了,Windows必装!尤其程序员!
Windows可谓是大多数人的生产力工具,集娱乐办公于一体,虽然在程序员这个群体中都说苹果是信仰,但是大部分不都是从Windows过来的,而且现在依然有很多的程序员用Windows。 所以,今天我就把我私藏的Windows必装的软件分享给大家,如果有一个你没有用过甚至没有听过,那你就赚了????,这可都是提升你幸福感的高效率生产力工具哦! 走起!???? NO、1 ScreenToGif 屏幕,摄像头和白板...
阿里面试,面试官没想到一个ArrayList,我都能跟他扯半小时
我是真的没想到,面试官会这样问我ArrayList。
曾经优秀的人,怎么就突然不优秀了。
职场上有很多辛酸事,很多合伙人出局的故事,很多技术骨干被裁员的故事。说来模板都类似,曾经是名校毕业,曾经是优秀员工,曾经被领导表扬,曾经业绩突出,然而突然有一天,因为种种原因,被裁员了,...
大学四年因为知道了这32个网站,我成了别人眼中的大神!
依稀记得,毕业那天,我们导员发给我毕业证的时候对我说“你可是咱们系的风云人物啊”,哎呀,别提当时多开心啦????,嗯,我们导员是所有导员中最帅的一个,真的???? 不过,导员说的是实话,很多人都叫我大神的,为啥,因为我知道这32个网站啊,你说强不强????,这次是绝对的干货,看好啦,走起来! PS:每个网站都是学计算机混互联网必须知道的,真的牛杯,我就不过多介绍了,大家自行探索,觉得没用的,尽管留言吐槽吧???? 社...
良心推荐,我珍藏的一些Chrome插件
上次搬家的时候,发了一个朋友圈,附带的照片中不小心暴露了自己的 Chrome 浏览器插件之多,于是就有小伙伴评论说分享一下我觉得还不错的浏览器插件。 我下面就把我日常工作和学习中经常用到的一些 Chrome 浏览器插件分享给大家,随便一个都能提高你的“生活品质”和工作效率。 Markdown Here Markdown Here 可以让你更愉快的写邮件,由于支持 Markdown 直接转电子邮...
看完这篇HTTP,跟面试官扯皮就没问题了
我是一名程序员,我的主要编程语言是 Java,我更是一名 Web 开发人员,所以我必须要了解 HTTP,所以本篇文章就来带你从 HTTP 入门到进阶,看完让你有一种恍然大悟、醍醐灌顶的感觉。 最初在有网络之前,我们的电脑都是单机的,单机系统是孤立的,我还记得 05 年前那会儿家里有个电脑,想打电脑游戏还得两个人在一个电脑上玩儿,及其不方便。我就想为什么家里人不让上网,我的同学 xxx 家里有网,每...
2020 年,大火的 Python 和 JavaScript 是否会被取而代之?
Python 和 JavaScript 是目前最火的两大编程语言,但是2020 年,什么编程语言将会取而代之呢? 作者 |Richard Kenneth Eng 译者 |明明如月,责编 | 郭芮 出品 | CSDN(ID:CSDNnews) 以下为译文: Python 和 JavaScript 是目前最火的两大编程语言。然而,他们不可能永远屹立不倒。最终,必将像其他编程语言一...
史上最全的IDEA快捷键总结
现在Idea成了主流开发工具,这篇博客对其使用的快捷键做了总结,希望对大家的开发工作有所帮助。
阿里程序员写了一个新手都写不出的低级bug,被骂惨了。
这种新手都不会范的错,居然被一个工作好几年的小伙子写出来,差点被当场开除了。
谁是华为扫地僧?
是的,华为也有扫地僧!2020年2月11-12日,“养在深闺人不知”的华为2012实验室扫地僧们,将在华为开发者大会2020(Cloud)上,和大家见面。到时,你可以和扫地僧们,吃一个洋...
AI 没让人类失业,搞 AI 的人先失业了
最近和几个 AI 领域的大佬闲聊 根据他们讲的消息和段子 改编出下面这个故事 如有雷同 都是巧合 1. 老王创业失败,被限制高消费 “这里写我跑路的消息实在太夸张了。” 王葱葱哼笑一下,把消息分享给群里。 阿杰也看了消息,笑了笑。在座几位也都笑了。 王葱葱是个有名的人物,21岁那年以全额奖学金进入 KMU 攻读人工智能博士,累计发表论文 40 余篇,个人技术博客更是成为深度学习领域内风向标。 ...
2020年,冯唐49岁:我给20、30岁IT职场年轻人的建议
点击“技术领导力”关注∆每天早上8:30推送 作者|Mr.K 编辑| Emma 来源|技术领导力(ID:jishulingdaoli) 前天的推文《冯唐:职场人35岁以后,方法论比经验重要》,收到了不少读者的反馈,觉得挺受启发。其实,冯唐写了不少关于职场方面的文章,都挺不错的。可惜大家只记住了“春风十里不如你”、“如何避免成为油腻腻的中年人”等不那么正经的文章。 本文整理了冯...
神级宝库!GitHub 标星 1.2w+,Chrome 最天秀的插件都在这里啦!
作者 | Rocky0429 来源 | Python空间 大家好,我是 Rocky0429,一个沉迷 Chrome 不能自拔的蒟蒻… 作为一个在远古时代用过什么 IE、360、猎豹等浏览器的资深器哥,当我第一次了解 Chrome 的时候,就被它的美貌给吸引住了… 就在我用了一段时间之后,我坚决的卸载了电脑上其它碍眼的浏览器,并觉得在之前的搬砖生涯中,我不配当哥,我只配是个沙雕… ...
作为一名大学生,如何在B站上快乐的学习?
B站是个宝,谁用谁知道???? 作为一名大学生,你必须掌握的一项能力就是自学能力,很多看起来很牛X的人,你可以了解下,人家私底下一定是花大量的时间自学的,你可能会说,我也想学习啊,可是嘞,该学习啥嘞,不怕告诉你,互联网时代,最不缺的就是学习资源,最宝贵的是啥? 你可能会说是时间,不,不是时间,而是你的注意力,懂了吧! 那么,你说学习资源多,我咋不知道,那今天我就告诉你一个你必须知道的学习的地方,人称...
那些年,我们信了课本里的那些鬼话
教材永远都是有错误的,从小学到大学,我们不断的学习了很多错误知识。 斑羚飞渡 在我们学习的很多小学课文里,有很多是错误文章,或者说是假课文。像《斑羚飞渡》: 随着镰刀头羊的那声吼叫,整个斑羚群迅速分成两拨,老年斑羚为一拨,年轻斑羚为一拨。 就在这时,我看见,从那拨老斑羚里走出一只公斑羚来。公斑羚朝那拨年轻斑羚示意性地咩了一声,一只半大的斑羚应声走了出来。一老一少走到伤心崖,后退了几步,突...
张朝阳回应迟到 1 分钟罚 500:资本家就得剥削员工
loonggg读完需要2分钟速读仅需 1 分钟大家我,我是你们的校长。前几天,搜狐的董事局主席兼 CEO 张朝阳和搜狐都上热搜了。原因很简单,就是搜狐出了“考勤新规”。一封搜狐对员工发布...
一个程序在计算机中是如何运行的?超级干货!!!
强烈声明:本文很干,请自备茶水!???? 开门见山,咱不说废话! 你有没有想过,你写的程序,是如何在计算机中运行的吗?比如我们搞Java的,肯定写过这段代码 public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } ...
【蘑菇街技术部年会】程序员与女神共舞,鼻血再次没止住。(文末内推)
蘑菇街技术部的年会,别开生面,一样全是美女。
那个在阿里养猪的工程师,5年了……
简介: 在阿里,走过1825天,没有趴下,依旧斗志满满,被称为“五年陈”。他们会被授予一枚戒指,过程就叫做“授戒仪式”。今天,咱们听听阿里的那些“五年陈”们的故事。 下一个五年,猪圈见! 我就是那个在养猪场里敲代码的工程师,一年多前我和20位工程师去了四川的猪场,出发前总架构师慷慨激昂的说:同学们,中国的养猪产业将因为我们而改变。但到了猪场,发现根本不是那么回事:要个WIFI,没有;...
为什么程序猿都不愿意去外包?
分享外包的组织架构,盈利模式,亲身经历,以及根据一些外包朋友的反馈,写了这篇文章 ,希望对正在找工作的老铁有所帮助
Java校招入职华为,半年后我跑路了
何来 我,一个双非本科弟弟,有幸在 19 届的秋招中得到前东家华为(以下简称 hw)的赏识,当时秋招签订就业协议,说是入了某 java bg,之后一系列组织架构调整原因等等让人无法理解的神操作,最终毕业前夕,被通知调往其他 bg 做嵌入式开发(纯 C 语言)。 由于已至于校招末尾,之前拿到的其他 offer 又无法再收回,一时感到无力回天,只得默默接受。 毕业后,直接入职开始了嵌入式苦旅,由于从未...
从顶级黑客到上市公司老板
一看标题,很多老读者就知道我在写什么了。今天Ucloud成功上市,季昕华成为我所熟悉的朋友里又双叒叕一个成功上市的案例。我们认识大概是十五年多吧,如果没记错,第一次见面应该是2004年,...
世界上有哪些代码量很少,但很牛逼很经典的算法或项目案例?
点击上方蓝字设为星标下面开始今天的学习~今天分享四个代码量很少,但很牛逼很经典的算法或项目案例。1、no code 项目地址:https://github.com/kelseyhight...
​两年前不知如何编写代码的我,现在是一名人工智能工程师
全文共3526字,预计学习时长11分钟 图源:Unsplash 经常有小伙伴私信给小芯,我没有编程基础,不会写代码,如何进入AI行业呢?还能赶上AI浪潮吗? 任何时候努力都不算晚。 下面,小芯就给大家讲一个朋友的真实故事,希望能给那些处于迷茫与徘徊中的小伙伴们一丝启发。(下文以第一人称叙述) 图源:Unsplash 正如Elsa所说,职业转换是...
强烈推荐10本程序员必读的书
很遗憾,这个春节注定是刻骨铭心的,新型冠状病毒让每个人的神经都是紧绷的。那些处在武汉的白衣天使们,尤其值得我们的尊敬。而我们这些窝在家里的程序员,能不外出就不外出,就是对社会做出的最大的贡献。 有些读者私下问我,窝了几天,有点颓丧,能否推荐几本书在家里看看。我花了一天的时间,挑选了 10 本我最喜欢的书,你可以挑选感兴趣的来读一读。读书不仅可以平复恐惧的压力,还可以对未来充满希望,毕竟苦难终将会...
立即提问