sping 注入问题

[hwy000]

我在action中为什么拿不到我xml中注入的action里的userService
action

public class SaveAction extends Action {
	/*
	 * Generated Methods
	 */

	private IUserService userService; 
	
	public IUserService getUserService() {
		return userService;
	}

	public void setUserService(IUserService userService) {
		this.userService = userService;
	}
	
	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
 		SaveForm loginForm = (SaveForm) form;// TODO Auto-generated method stub
		User user = new User();
		user.setName(loginForm.getName());
		this.userService.save(user);	//插入的方法	
		return null;
	}
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>

	<bean id="beanID" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName"
			value="com.microsoft.sqlserver.jdbc.SQLServerDriver">
		</property>
		<property name="url"
			value="jdbc:sqlserver://localhost:1434;databaseName=test">
		</property>
		<property name="username" value="sa"></property>
		<property name="password" value="xxxxx"></property>
	</bean>
	
	<bean id="sessinFatoryID"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="beanID" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.SQLServerDialect
				</prop>
			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>com/xxxx/hibernate/xml/User.hbm.xml</value>
			</list>
		</property>
	</bean>
		<bean id="userDao" class="com.xxxx.hibernate.dao.UserDAO" >
			<property name="sessionFactory">
				<ref bean="sessinFatoryID"/>
			</property>
		</bean>
     <bean id="userService" class="com.xxxx.service.impl.UserService">
		<property name="userDAO">
		<ref bean="userDao"/>
		</property>
	 </bean>
		<bean name="/addUser" class="com.xxxx.struts.action.SaveAction">		
			<property name="userService">
			<ref bean="userService" />
			</property>
		</bean>
</beans> 

userService无法注入

[fcq6224822]

把抛的异常贴出来吧

[hwy000]

空指针异常: 也就是action中this.userService == null

[hwy000]

空指针异常: 也就是action中的this.userService == null

[fcq6224822]

贴出来行不

[hwy000]

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: java.lang.NullPointerException
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:545)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:486)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


root cause

java.lang.NullPointerException
com.rexcel.struts.action.SaveAction.execute(SaveAction.java:54)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


note The full stack trace of the root cause is available in the JBossWeb/2.0.1.GA logs.


--------------------------------------------------------------------------------

JBossWeb/2.0.1.GA

[ouyangxiaokang6]

你注入的类型对吗？userService再action里面怎么成了IUserService了

[hwy000]

IUserService 是com.xxxx.service.impl.UserService的接口

[fcq6224822]

贴出来的是页面显示的异常还是服务器端的？？

[king3320x]

this.userService.save(user); //插入的方法

把this去了
userService.save(user); 直接用这个看行不

[hwy000]

<bean name="/addUser" class="com.xxxx.struts.action.SaveAction"> name定义错误

[luobaolin2009]

name中前面多了个空格吧

[yongxing14]

能个类测试一下。

public class Test
{
	public static void main(String[] args)
	{
		// TODO Auto-generated method stub
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		UserDao userDao=(UserDao) ac.getBean("userDao");
		userDao.getAll();
	}

}