struts2+spring+hibernate整合,spring出现问题.

问题描述

先看看我的配置文件：<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>find.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>struts2</filter-name> <filter-class> org.apache.struts2.dispatcher.FilterDispatcher </filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:applicationContext*.xml </param-value> </context-param> </web-app> <?xml version="1.0" encoding="utf-8"?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts><package name="eden" extends="struts-default"><action name="selectBook"class="com.action.BookAction"><result name="success">/index.jsp</result></action></package></struts> <?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"><bean id="sessionFactory"class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="configLocation"value="classpath:hibernate.cfg.xml"></property></bean><bean id="BookDAO" class="com.dao.impl.BookDAO"><property name="sessionFactory"><ref bean="sessionFactory" /></property></bean><bean id="BookService" class="com.service.impl.BookService"><property name="bookDAO" ref="BookDAO"></property></bean><bean id="BookAction" class="com.action.BookAction"><property name="bookService" ref="BookService"></property></bean></beans> package com.action;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import com.entity.Book;import com.opensymphony.xwork2.ActionSupport;import com.service.IBookService;public class BookAction extends ActionSupport{private IBookService BookService;private Book book;@Overridepublic String execute() throws Exception {HttpServletRequest request = ServletActionContext.getRequest();List<Book> bookItem = BookService.selectBookAll();//这行报空指针异常System.out.println("List Size:" + bookItem.size());request.setAttribute("bookItem", bookItem);return SUCCESS;}public Book getBook() {return book;}public void setBook(Book book) {this.book = book;}public IBookService getBookService() {return BookService;}public void setBookService(IBookService bookService) {BookService = bookService;}} 2010-9-11 12:08:30 org.apache.catalina.core.StandardWrapperValve invoke严重: Servlet.service() for servlet default threw exceptionjava.lang.NullPointerExceptionat com.action.BookAction.execute(BookAction.java:22)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150)at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:48)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:123)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:167)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:105)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:83)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:207)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:74)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:127)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:107)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:206)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:121)at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:170)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:123)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)at java.lang.Thread.run(Unknown Source) 服务器启动时不会抛异常，在执行Action的时候，报空指针异常。说明在Action中的Service类没有注入成功。不知道是什么原因？ 问题补充：<div class="quote_title">pxb1988 写道</div><div class="quote_div"><div class="quote_title">引用</div><div class="quote_div"><br />&lt;bean id="BookAction" class="com.action.BookAction"&gt;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;property name="bookService" ref="BookService"&gt;&lt;/property&gt;&nbsp; <br />&nbsp;&nbsp;&nbsp; &lt;/bean&gt; <br /></div><br />改为<br /><pre name="code" class="java">//id与struts2的name对应&lt;bean id="selectBook" class="com.action.BookAction"&gt; &lt;property name="bookService" ref="BookService"&gt;&lt;/property&gt; &lt;/bean&gt; </pre></div><br /><br />还是注入不了。报一样的错误！！！<br />是不是JAR包有冲突呢？

解决方案

引用<bean id="BookAction" class="com.action.BookAction"> <property name="bookService" ref="BookService"></property> </bean> 改为//id与struts2的name对应<bean id="selectBook" class="com.action.BookAction"> <property name="bookService" ref="BookService"></property> </bean>

时间： 2024-08-03 17:08:56

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