springMVC与tomcat的jdk版本冲突总结
项目一开始使用jdk1.7就能满足需求，于是开始开发了，到现在因为某些功能需要jdk1.8，不得不进行升级。花了整整一下午加一晚上才解决了这些冲突。
注：以下称“项目->properties->project facets->java->version”为“facetJava”
一、设置环境
安装好jdk以后，设置eclipse里的JRE：window->preferences->java->installed jres，如下图所示：
继续设置JavaSE：window->preferences->java->installed jres->execution environments，如下图所示：
设置项目编译等级：项目->properties->java compiler，勾选Use compliance from execution environment。这将会在修改运行环境时自动调整匹配的编译等级。
设置部署路径：项目->properties->deployment assembly，如下图所示：
设置tomcat运行环境，为了区分tomcat使用不同的jdk，这里分别使用tomcat7运行jdk1.7，tomcat8运行jdk1.8。实际上tomcat7也可以运行jdk1.8的。设置步骤如下：window->preferences->server->runtime environment
二、正确匹配
（只是示例，并不一定非要这样设置，总之需要同时匹配这四项）
使用JavaSE1.7+spring3.2.0+facetJava1.7+tomcat7。
使用JavaSE1.8+spring4.1.6+facetJava1.8+tomcat8。
三、各种报错
1.使用JavaSE1.8+spring3.2.0+facetJava1.7+tomcat7。
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [D:\DevelopDocument\svn2\.metadata\.plugins\org.eclipse.wst.server.core\tmp7\wtpwebapps\sims\WEB-INF\classes\di\controller\GisController.class]; nested exception is java.lang.IllegalArgumentException
at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:281)
at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)
at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84)
at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1435)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1425)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
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:131)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5099)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5615)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException
at org.springframework.asm.ClassReader.(Unknown Source)
at org.springframework.asm.ClassReader.(Unknown Source)
at org.springframework.asm.ClassReader.(Unknown Source)
at org.springframework.core.type.classreading.SimpleMetadataReader.(SimpleMetadataReader.java:52)
at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:257)
... 32 more
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:172)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1090)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1064)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1010)
at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:549)
at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:143)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5146)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5810)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745) 2.使用JavaSE1.8+spring3.2.0+facetJava1.8+tomcat7。
无法将项目添加到tomcat7中。
提示框：There are no resources that can be added or removed from the server。
原因是facetJava版本高于tomcat的jdk版本。
3.使用JavaSE1.8+spring3.2.0+facetJava1.8+tomcat8。
提示错误同1
据说是spring3不兼容jdk1.8，没有进行验证，从初步测试结果来看确实是这样。
4.修改maven中spring版本后，Maven Dependencies中同步修改了。但是tomcat运行目录下的lib中同时存在多个spring版本，依然导致错误1。原因是项目路径{project}->src->lib中存在旧版本的jar包，删掉该lib文件夹即可解决。为了解决这个问题，新建项目一个个测试配置文件与配置项，都无效果。结果现在即使重新建了lib文件夹，也无法复现这个bug了。求解。。。