MyEclipse环境的项目改为在Eclipse中运行爬坑记【我】
新检出一个web项目，同事都是运行在MyEclipse中的，我用Eclipse启动，
1、首先是许多jar包报错：
处理方法为 remove掉，然后 选 WEB-INF 下的所有 jar 重新添加进去。
2、MyEclipse 中自带 JavaEE5 library jar包合集，而Eclipse中没有，项目中有用到，解决方法
从同事的 MyEclipse 安装目录下把 EE_5 目录拷过来，主要是有下面这4个jar包：
然后，添加到项目中，可以建一个用户目录：
这样就建好了，如图：
但是这时，项目启动，还是不会把这些jar引入到项目中，还需要如下配置：
添加完是如下效果：
这样就把Javaee5的相关jar包彻底引入到项目中了。
3、启动项目，报如下异常：
典型异常信息： URL [jar:file:/C:/Program%20Files%20(x86)/Java/jre6/lib/ext/jfxrt.jar!/com/sun/glass/ui/Accessible.class
全部异常信息如下：
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Failed to import bean definitions from relative location [applicationContext-service.xml] Offending resource: class path resource [config/spring/applicationContext.xml]; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [jar:file:/C:/Program%20Files%20(x86)/Java/jre6/lib/ext/jfxrt.jar!/com/sun/glass/ui/Accessible.class]; nested exception is java.lang.ArrayIndexOutOfBoundsException: 3805021 at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:76) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.importBeanDefinitionResource(DefaultBeanDefinitionDocumentReader.java:271) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseDefaultElement(DefaultBeanDefinitionDocumentReader.java:196) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:181) 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:530) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:444) 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:111) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467) 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$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [jar:file:/C:/Program%20Files%20(x86)/Java/jre6/lib/ext/jfxrt.jar!/com/sun/glass/ui/Accessible.class]; nested exception is java.lang.ArrayIndexOutOfBoundsException: 3805021 at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:261) 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:1423) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1413) 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.xml.DefaultBeanDefinitionDocumentReader.importBeanDefinitionResource(DefaultBeanDefinitionDocumentReader.java:255) ... 29 more Caused by: java.lang.ArrayIndexOutOfBoundsException: 3805021 at org.springframework.asm.ClassReader.readInt(Unknown Source) at org.springframework.asm.ClassReader.accept(Unknown Source) at org.springframework.asm.ClassReader.accept(Unknown Source) at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:59) 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:237) ... 42 more com.cthq.crm.webservice.task.BussinessTask@834e7 2019-08-12 15:45:26,084 INFO [Timer-1] com.jtcrm.resource.framework.taskmanager.CacheFlushLoigc.processLogic(CacheFlushLoigc.java:28) {} - processLogic start!!! 2019-08-12 15:45:26,097 INFO [Timer-1] com.jtcrm.resource.framework.taskmanager.CacheFlushLoigc.processLogic(CacheFlushLoigc.java:33) {} - 0 2019-08-12 15:45:26,097 INFO [Timer-1] com.jtcrm.resource.framework.taskmanager.CacheFlushLoigc.processLogic(CacheFlushLoigc.java:72) {} - processLogic end!!! 2019-8-12 15:45:26 org.apache.catalina.core.StandardContext startInternal 严重: Error listenerStart 2019-8-12 15:45:26 org.apache.catalina.core.StandardContext startInternal 严重: Context [/CRMResource] startup failed due to previous errors 2019-8-12 15:45:26 org.apache.catalina.core.ApplicationContext log 信息: Closing Spring root WebApplicationContext 2019-8-12 15:45:26 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:172) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1078) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1052) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1000) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:548) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:142) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5014) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5659) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)
不管是 使用 jdk 1.8，还是jdk 1.6 都是报上面的异常。
最终参考下面的博文，
org.springframework.asm.ClassReader.(Unknown Source) 解决方案
此类问题一般在 spring版本 与 jdk版本不匹配的情况下会出现。
匹配规则：
spring3 + java7
spring4 + java8
解决方案：
1：检查项目的jdk编译版本 ：右键项目，进入项目偏好设置，找到 java Compiler ，将jdk修改到你对应的spring版本
2：检查tomcat的jre版本：以eclipse为例：打开eclipse的偏好设置，搜索 server ，找到 Runtime Environments 找到你加载进来的tomcat 点击edit,将jre修改为对应你spring的版本。
到此问题应该就能得到解决。
发现本地项目用的Spring是3.1：
将jdk改为1.7后，故障排除【奇怪的是，同时用MyEclipse，用的其自带1.6环境运行项目居然不报错】。
Eclipse切换jdk的方法：
一、Eclipse中整体添加多个jdk
这里只要选中一个包含 jdk 内容的目录即可，这个目录中的jdk不用真的安装在电脑里面，只要有这个文件夹就行了。
这样一个新的 jdk环境就添加到Eclipse中了，一个Eclipse中可以添加多个JDK环境。
二、项目的JDK主要有两个部分
1编译环境：
项目右键
2、是运行项目的Tomcat的jdk环境:
