struts2與struts1整合，java.lang.InstantiationException, Exception occurred during processing request: nu

作了2個action，其中一個運行沒有問題，另外一個報錯，看下面的報錯信息，再看了看struts.xml，由於沒有給GetBooks這個action配置actionform，因此就致使報null。下面是有問題的struts.xml，其中主要的問題就是沒有給GetBooks這個action配置actionform，也就是沒有添加那個interceptor-ref name="integration"，添加上就行了（這個form在應用的邏輯裏面，GetBooks是不須要form的，可是多是因爲struts2和struts1整合的時候要求每一個action都必須有form，因此我就隨便給GetBooks這個action配置了一個form，在GetBooks這個action裏面不使用那個form就好了）

<?xml version="1.0" encoding="GBK" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <constant name="struts.i18n.encoding" value="GBK"/>
    <constant name="struts.custom.i18n.resources" value="messageResource"/>


    <package name="lee" extends="struts1-default" namespace="/test">
        <interceptors>
            <interceptor name="loginForm" 
                class="com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor">
                <param name="className">lee.LoginForm</param>
                <param name="name">loginForm</param>
            </interceptor>        
            <interceptor-stack name="integration">
                <interceptor-ref name="staticParams"/>
                <interceptor-ref name="loginForm"/>
                <interceptor-ref name="modelDriven"/>
                <interceptor-ref name="actionForm-reset"/>
                <interceptor-ref name="basicStack"/>
                <interceptor-ref name="actionForm-validation"/>
                <interceptor-ref name="workflow"/>
            </interceptor-stack>
        </interceptors>

        <action name="Login" class="org.apache.struts2.s1.Struts1Action">
            <param name="className">lee.LoginAction</param>
            <result name="success">welcome.jsp</result>
            <result name="error">error.jsp</result>
            <interceptor-ref name="integration" />
        </action>

        <action name="GetBooks" class="org.apache.struts2.s1.Struts1Action">
            <param name="className">lee.GetBooksAction</param>
            <result name="login">login.jsp</result>
            <result name="success">showBook.jsp</result>
        </action>
    </package>

</struts>    
    

 

嚴重: Exception occurred during processing request: null
java.lang.InstantiationException
at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at java.lang.Class.newInstance(Class.java:433)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:151)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:182)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:171)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.resolveModel(ScopedModelDrivenInterceptor.java:106)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:136)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:744)