项目启动过程中出现如下报错：
2018-04-17 16:44:00,113 [WrapperSimpleAppMain] ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from URL [jar:file:/F:/software/apache-continuum-1.4.2/apps/continuum/WEB-INF/lib/continuum-api-1.4.2.jar!/META-INF/spring-context.xml]; nested exception is java.lang.IllegalStateException: Context namespace element 'annotation-config' and its parser class [org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser] are only available on JDK 1.5 and higher at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:420) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:342) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124) at org.codehaus.plexus.spring.PlexusWebApplicationContext.loadBeanDefinitions(PlexusWebApplicationContext.java:55) at org.codehaus.plexus.spring.PlexusWebApplicationContext.loadBeanDefinitions(PlexusWebApplicationContext.java:101) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:422) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:352) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:771) at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:411) at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:763) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:247) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1238) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:706) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:480) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:39) at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:186) at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:494) at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:141) at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:145) at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:56) at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:609) at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:540) at org.eclipse.jetty.util.Scanner.scan(Scanner.java:403) at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:337) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:121) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:555) at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:230) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:81) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58) at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:96) at org.eclipse.jetty.server.Server.doStart(Server.java:277) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1265) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1188) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.jetty.start.Main.invokeMain(Main.java:468) at org.eclipse.jetty.start.Main.start(Main.java:616) at org.eclipse.jetty.start.Main.main(Main.java:92) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:240) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.IllegalStateException: Context namespace element 'annotation-config' and its parser class [org.springframework.context.annotation.AnnotationConfigBeanDefinitionParser] are only available on JDK 1.5 and higher at org.springframework.context.config.ContextNamespaceHandler$1.parse(ContextNamespaceHandler.java:65) at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:69) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1297) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1287) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:92) at org.codehaus.plexus.spring.PlexusBeanDefinitionDocumentReader.registerBeanDefinitions(PlexusBeanDefinitionDocumentReader.java:85) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:507) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:398) ... 59 more
问题原因：
根本原因是JDK版本（1.8）与spring版本（2.5.6）之间不兼容的问题。org.springframework.context.annotation. AnnotationConfig BeanDefinitionParser会自动检测jdk的版本，检测时需要jre1.5以上版本，但是JdkVersion只检查到了1.7，jre1.8 时不匹配任何jdk。
解决办法：
1、降低jdk的版本
2、修改spring-2.5.6.jar的源码
① 在项目中创建一个package为org.springframework.core
② 在该package下面新建JdkVersion.java，内容如下：
package org.springframework.core;
public abstract class JdkVersion {
public static final int JAVA_13 = 0;
public static final int JAVA_14 = 1;
public static final int JAVA_15 = 2;
public static final int JAVA_16 = 3;
public static final int JAVA_17 = 4;
//for jre 1.8
public static final int JAVA_18 = 5;
private static final String javaVersion = System
.getProperty("java.version");
private static final int majorJavaVersion;
public static String getJavaVersion() {
return javaVersion;
}
public static int getMajorJavaVersion() {
return majorJavaVersion;
}
public static boolean isAtLeastJava14() {
return true;
}
public static boolean isAtLeastJava15() {
return getMajorJavaVersion() >= 2;
}
public static boolean isAtLeastJava16() {
return getMajorJavaVersion() >= 3;
}
static {
//for jre 1.8
if (javaVersion.indexOf("1.8.") != -1) {
majorJavaVersion = 5;
}else if (javaVersion.indexOf("1.7.") != -1) {
majorJavaVersion = 4;
} else if (javaVersion.indexOf("1.6.") != -1) {
majorJavaVersion = 3;
} else if (javaVersion.indexOf("1.5.") != -1) {
majorJavaVersion = 2;
} else {
majorJavaVersion = 1;
}
}
} ③
到项目的WEB-INF/classes 下面找到对应的package中的JdkVersion.class文件
④ 将项目中的spring-core-2.5.6.jar拷贝出来打开，然后将JdkVersion.class替换jar包中的该文件。
⑤ 将修改后的spring-core-2.5.6.jar再覆盖到项目中即可。
3、在spring-2.5.6jar的org\springframework\core\下有JdkVersion.class这个类，同时在spring-core.4.2.0.RELEASE也有这个类，所以在引入jar包的时候不需要引入spring-2.5.6jar只引入spring-core.4.2.0.RELEASE就行了