紧接着上一节(3)，现在maven新建web项目，user-web。模拟一个用户登录的需求：

工程结构：

pom.xml:

       
      
       4.0.0
        
      
       com.cy.user
        
      
       user-web
        
      
       war
        
      
       0.0.1-SNAPSHOT
        
            
             
               
        
         javax.servlet
                
        
         javax.servlet-api
                
        
         3.1.0
            
                   
               
        
         javax.servlet.jsp
                
        
         javax.servlet.jsp-api
                
        
         2.3.1
            
               
           
               
        
         javax.servlet
                
        
         jstl
                
        
         1.2
            
                   
           
                 
        
         org.springframework
                  
        
         spring-core
                  
        
         4.1.7.RELEASE
              
             
                 
        
         org.springframework
                  
        
         spring-beans
                  
        
         4.1.7.RELEASE
              
             
                
        
         org.springframework
                 
        
         spring-tx
                 
        
         4.1.7.RELEASE
                
             
                 
        
         org.springframework
                  
        
         spring-context
                  
        
         4.1.7.RELEASE
              
             
                 
        
         org.springframework
                  
        
         spring-context-support
                  
        
         4.1.7.RELEASE
              
                   
               
        
         org.springframework
                
        
         spring-web
                
        
         4.1.7.RELEASE
            
               
               
        
         org.springframework
                
        
         spring-webmvc
                
        
         4.1.7.RELEASE
            
               
                 
        
         com.cy.user
                  
        
         user-service
                  
        
         0.0.1-SNAPSHOT
              
             
             
        
         junit
              
        
         junit
              
        
         4.12
              
        
         test
            
         
        
          
       
        user-web
         
      
     

注意上面user-web项目添加了第3节里面的user-service依赖，需要将user-service maven install发布到本地仓库；

但是不需要添加user-dao的依赖，因为user-service里面已经依赖了user-dao。依赖的继承；

 

src/main/resources/srping-mvc.xml:

webapp/WEB-INF/web.xml:

     
       
      
       user-web
        
          
       
        index.jsp
         
            
          
              
       
        contextConfigLocation
               
       
        classpath:applicationContext.xml
           
          
          
              
       
        encodingFilter
               
       
        org.springframework.web.filter.CharacterEncodingFilter
               
       
        true
               
                   
        
         encoding
                    
        
         UTF-8
                
           
          
              
       
        encodingFilter
               
       
        /*
           
          
          
              
       
        org.springframework.web.context.ContextLoaderListener
           
              
          
              
       
        springMVC
               
       
        org.springframework.web.servlet.DispatcherServlet
               
                   
        
         contextConfigLocation
                    
        
         classpath:spring-mvc.xml
                
               
       
        1
               
       
        true
           
          
              
       
        springMVC
               
       
        *.do
           
      
     

com.cy.user.controller.UserController.java:

package com.cy.user.controller;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import com.cy.user.entity.User;import com.cy.user.service.UserService;@Controller@RequestMapping("/user")public class UserController {        @Autowired    private UserService userService;        /**     * 用户登录     * @param user     * @param request     * @return     */    @RequestMapping("/login")    public String login(User user,HttpServletRequest request){        User resultUser=userService.login(user);        if(resultUser==null){            request.setAttribute("user", user);            request.setAttribute("errorMsg", "用户名或密码错误!");            return "index";        }else{            HttpSession session=request.getSession();            session.setAttribute("currentUser", resultUser);            return "redirect:/success.jsp";        }    }}

注意上面的重定向：return "redirect:/success.jsp";

 

index.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
      
      
           userName:
       
       
    password:
       
       
    
       
       ${errorMsg }
      

success.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
      欢迎：${currentUser.userName }

 

最后访问http://localhost:8080/user-web/index.jsp进行测试；

 

--------