一、项目结构及相应jar包，如下图

二、UserService代码

package com.hjp.service;/** * Created by JiaPeng on 2015/11/15. */public class UserService {    public void addUser() {        System.out.println("add user");    }}

三、创建一个HelloServlet，代码：

package com.hjp.web.servlet;import com.hjp.service.UserService;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;import java.io.IOException;/** * Created by JiaPeng on 2015/11/15. */public class HelloServlet extends javax.servlet.http.HttpServlet {    protected void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {        this.doGet(request, response);    }    protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {        //方式1，手动从ServletContext作用域中获得内容        //WebApplicationContext applicationContext = (WebApplicationContext) this.getServletContext().getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);        WebApplicationContext applicationContext= WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());        UserService userService = (UserService) applicationContext.getBean("userService");        userService.addUser();    }}

四、web.xml中配置，主要是注意监听的配置

      
          
           
               
        
         contextConfigLocation
                
        
         classpath:applicationContext.xml
            
           
           
               
        
         org.springframework.web.context.ContextLoaderListener
            
           
               
        
         HelloServlet
                
        
         com.hjp.web.servlet.HelloServlet
            
           
               
        
         HelloServlet
                
        
         /HelloServlet
            
           
               
        
         /index.jsp
            
       
      

五、applicationContext.xml文件