手动装配Spring与Webwork配置的问题研究 高手进（修改spring-xwork-integration.jar方法实现）

Question

手动装配Spring与Webwork配置 修改spring-xwork-integration.jar方法实现 
永久链接: http://panshunchang.javaeye.com/blog/675464 
我在网上看到一个spring 结合webwork的实例，自己弄了一下，发现老出现一个奇怪的错误 按照下面的配置，会出现一个一样的错误 严重: Could not execute action 
java.lang.IllegalStateException: The application context has not been set on this resolver 
at com.opensymphony.xwork.spring.SpringExternalReferenceResolver.resolveReferences(SpringExternalReferenceResolver.java:38) 
at com.opensymphony.xwork.interceptor.ExternalReferencesInterceptor.before(ExternalReferencesInterceptor.java:40) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:34) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35) 
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165) 
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115) 
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:229) 
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:199) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174) 
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) 
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873) 
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) 
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) 
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 
at java.lang.Thread.run(Unknown Source) 我使用的是spring-xwork-integration.jar 这jar包来在webwork的action里面IOC注入spring的bean对象，异常提示的代码： The application context has not been set on this resolver 经分析就是在spring-xwork-integration.jar 的SpringExternalReferenceResolver里，其中一段代码如下   public void resolveReferences(ActionInvocation paramActionInvocation) 
    throws ReferenceResolverException 
  { 
    if(this.applicationContext == null) throw new IllegalStateException("The application context has not been set on this resolver"); -------------------- } 也就是说方法里的applicationContext 取不到，真奇怪，我在web.xml里配置了该jar包的listener <listener> 
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener>     <listener> 
   <listener-class>com.opensymphony.xwork.spring.SpringObjectFactoryListener</listener-class> 
  </listener>  -----------------这个就是spring-xwork-integration.jar里的listener SpringObjectFactoryListener代码里主要片段：   public void contextInitialized(ServletContextEvent paramServletContextEvent) 
  { 
    ServletContext localServletContext = paramServletContextEvent.getServletContext(); 
    WebApplicationContext localWebApplicationContext = WebApplicationContextUtils.getWebApplicationContext(localServletContext); 
    SpringObjectFactory localSpringObjectFactory = new SpringObjectFactory(); 
    localSpringObjectFactory.setApplicationContext(localWebApplicationContext); 
    ObjectFactory.setObjectFactory(localSpringObjectFactory); 
  } 里面是可以得到applicationContext 对象的，但是手工装配的SpringExternalReferenceResolver里没有给applicationContext 赋值，所以报错了，所以我更改了jar里的类，我首先用jd-gui.exe反编译jar，把这3个文件修改了 主要是在SpringObjectFactoryListener里新增一个静态实例变量 public static org.springframework.context.ApplicationContext.ApplicationContext aplicationContextWeb = null; 然后到SpringExternalReferenceResolver这个java类里的contextInitialized方法体里赋值 aplicationContextWeb = localWebApplicationContext; 那么在SpringExternalReferenceResolver里，在使用applicationContext前赋值 也就是 
applicationContext = SpringObjectFactoryListener.aplicationContextWeb; 编译好后，打jar包，覆盖原来的，重启tomcat，就通过了手工装配的测试。 但是如果在web.xml里把 <listener> 
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener>     <listener> 
   <listener-class>com.opensymphony.xwork.spring.SpringObjectFactoryListener</listener-class> 
  </listener>  -----------------这个就是spring-xwork-integration.jar里的listener 2个位置对调，变成 
  <listener> 
   <listener-class>com.opensymphony.xwork.spring.SpringObjectFactoryListener</listener-class> 
  </listener>  -----------------这个就是spring-xwork-integration.jar里的listener <listener> 
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener>   
系统又会出错，这个问题更复杂，具体原因我还不是是否清楚。有哪位精通的高手给我答案吗？？？？？？？？？？？ 谢谢啦！！！！！！！！！！！！！！！！！！ 
javaeyes里我也发表了，里面可以传文件http://www.javaeye.com/topic/676059------------------------------------------------下面是我看到的例子 原文在http://gis8.blog.sohu.com/41790075.html ---------------------------------------------------------------------------- 一个手动装配的Spring与Webwork集成配置示例 
标签： webwork  spring  集成  配置  手动装配  
在web.xml中配置如下内容： 
<listener> 
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener> 
<!--有人说这句话要放上，可我发现如果在Webwork2.2.4的webwork.properties配置文件中配置了webwork.objectFactory = spring，则可以去掉，实践出真知哟:-)--> 
<!--listener> 
  <listener-class>com.opensymphony.xwork.spring.SpringExternalReferenceResolver</listener-class> 
</listener--> xwork.xml文件，如下: 
1 <!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" 
2 "http://www.opensymphony.com/xwork/xwork-1.0.dtd"> 
3 <xwork> 
4 <include file="webwork-default.xml"/> 
5 <!-- 注意是com.opensymphony.xwork.spring.SpringExternalReferenceResolver --> 
6 <package name="myDefault" extends="webwork-default" 
7  externalReferenceResolver="com.opensymphony.xwork.spring.SpringExternalReferenceResolver"> 
8  <interceptors> <!-- 定义一组拦截器 --> 
9     <interceptor name="myReferenceResolver" <!--不使用自动装配时,使用ExternalReferencesInterceptor--> 
10           class="com.opensymphony.xwork.interceptor.ExternalReferencesInterceptor"/> 
11    <interceptor-stack name="myDefaultStack"> 
12      <interceptor-ref name="defaultStack"/> 
13       <interceptor-ref name="params"/> 
14       <interceptor-ref name="myReferenceResolver" /> 
15      </interceptor-stack> 
16    </interceptors> 
17   <default-interceptor-ref name="myDefaultStack"/> <!-- 名称与第11行相同，指定默认的拦截器--> 
18  </package> 
19 </xwork> 自定义的Action配置文件，样式如下： 
<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" "http://www.opensymphony.com/xwork/xwork-1.0.dtd"><xwork> 
<package name="demo" extends="myDefault" > 
  <action name="demo" class="com.demo.DemoAction"> 
   <external-ref name="demoLogic">myLogic</external-ref><!-- 这时外部引用Bean名称与Action属性名称可以不相同，使用ActionAutowiringInterceptor时很难做到这一点--> 
   <result name="success">test.jsp</result> 
  </action> 
</package> 
</xwork> 

Answer 1

这是由于我用的spring-xwork-integration.jar有问题，而且class类也只有3个，版本有问题，重新下载一份spring-xwork-integration.jar就可以看到，跟你原来的不一样了，而且你侦听的listener也应该为：
<listener-class>org.springframework.web.context.SpringExternalReferenceResolverSetupListener</listener-class>  而非<listener-class>org.springframework.web.context.SpringObjectFactoryListener</listener-class>这样就可以了！而且如果要自动装配（也就是xwork里不需要配置external-ref），那么方法有：建立一个拦截器，加到默认的拦截器中，
拦截器使用下面方法注入bean到action((AbstractApplicationContext)applicationContext).getBeanFactory().autowireBeanProperties(invocation.getAction(),AutowireCapableBeanFactory.AUTOWIRE_BY_NAME,false); 即可