Spring MVC系列[2]——参数传递及重定向

1.目录结构

　　

2.代码

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app version="2.5" 
 3     xmlns="http://java.sun.com/xml/ns/javaee" 
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 5     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 6     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 7   <servlet>
 8       <servlet-name>springmvc</servlet-name>
 9       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
10       <init-param>
11           <param-name>contextConfigLocation</param-name>
12           <param-value>classpath:spring-mvc.xml</param-value>
13       </init-param>
14       <load-on-startup>1</load-on-startup>
15   </servlet>
16   
17   <servlet-mapping>
18       <servlet-name>springmvc</servlet-name>
19       <url-pattern>*.do</url-pattern>
20   </servlet-mapping>
21 </web-app>
web.xml
 1 <?xml version="1.0" encoding="utf-8"?>
 2 
 3 <beans xmlns="http://www.springframework.org/schema/beans" 
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" 
 5     xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" 
 6     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 
 7     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" 
 8     xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation="         
 9     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd         
10     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd        
11     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd         
12     http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd         
13     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd         
14     http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd        
15     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd         
16     http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd        
17     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"> 
18     
19     <!-- 开启注解扫描 -->
20     <context:component-scan base-package="com.java"/>
21     
22     <!-- 开启mvc注解扫描 -->
23     <mvc:annotation-driven/>
24     
25     <!-- 定义视图解析器 -->
26     <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
27         <property name="prefix" value="/WEB-INF/"/>
28         <property name="suffix" value=".jsp"/>
29     </bean>
30 
31 </beans>
spring-mvc.xml
 1 package com.java.entity;
 2 
 3 public class User {
 4     private Integer userId;
 5     private String userName;
 6     private String password;
 7     
 8     
 9     public Integer getUserId() {
10         return userId;
11     }
12     public void setUserId(Integer userId) {
13         this.userId = userId;
14     }
15     public String getuserName() {
16         return userName;
17     }
18     public void setuserName(String userName) {
19         this.userName = userName;
20     }
21     public String getPassword() {
22         return password;
23     }
24     public void setPassword(String password) {
25         this.password = password;
26     }
27     
28 }
User
  1 package com.java.controller;
  2 
  3 import java.util.HashMap;
  4 import java.util.Map;
  5 
  6 import javax.servlet.http.HttpServletRequest;
  7 import javax.servlet.http.HttpSession;
  8 
  9 import org.springframework.stereotype.Controller;
 10 import org.springframework.ui.ModelMap;
 11 import org.springframework.web.bind.annotation.ModelAttribute;
 12 import org.springframework.web.bind.annotation.RequestMapping;
 13 import org.springframework.web.bind.annotation.RequestParam;
 14 import org.springframework.web.servlet.ModelAndView;
 15 import org.springframework.web.servlet.view.RedirectView;
 16 
 17 import com.java.entity.User;
 18 
 19 @Controller
 20 @RequestMapping("/demo")
 21 public class HelloController {
 22     
 23     /**
 24      * 接收参数方式一：采用HttpServletRequest
 25      * @param request
 26      * @return
 27      */
 28     @RequestMapping("/test1.do")
 29     public String test1(HttpServletRequest request){
 30         String userName = request.getParameter("userName");
 31         String password = request.getParameter("password");
 32         
 33         System.out.println("userName:"+userName);
 34         System.out.println("password:"+password);
 35         
 36         return "jsp/success";    
 37     }
 38     
 39     /**
 40      * 接收参数方式二：采用@RequestParam注解方式
 41      * @param userName
 42      * @param password
 43      * @return
 44      */
 45     @RequestMapping("/test2.do")
 46     public String test2(
 47             @RequestParam String userName,
 48             @RequestParam String password){
 49         System.out.println("userName:"+userName);
 50         System.out.println("password:"+password);
 51         return "jsp/success";
 52     }
 53     
 54     /**
 55      * 接收参数方式三：采用实体方式
 56      * 前提是： 被提交表单中name 和 实体中的属性完全一致
 57      * @param user
 58      * @return
 59      */
 60     @RequestMapping("/test3.do")
 61     public String test3(User user){
 62         System.out.println("userName:"+user.getuserName());
 63         System.out.println("password:"+user.getPassword());
 64         return "jsp/success";
 65     }
 66     
 67     
 68     ////////////////////////////////////////////////////////////
 69     /*以下是对【传出参数 的研究】*/
 70     
 71     /**
 72      * 传出参数方式一：使用ModelAndView传出参数
 73      */
 74     @RequestMapping("test4.do")
 75     public ModelAndView test4(){
 76         Map<String, Object> data = new HashMap<String, Object> ();
 77         data.put("success", true);
 78         data.put("message", "操作成功");
 79         return new ModelAndView("jsp/success",data);
 80     }
 81     
 82     /**
 83      * 传出参数方式二：使用ModelMap传出参数
 84      * @param map
 85      * @return
 86      */
 87     @RequestMapping("test5.do")
 88     public ModelAndView test5(ModelMap map){
 89         map.addAttribute("success", false);
 90         map.addAttribute("message", "操作失败");
 91         return new ModelAndView("jsp/success");
 92     }
 93     
 94     /**
 95      * 使用ModelAttribute传出实体属性值
 96      * ModelAttribute 会利用 HttpServletRequest 的 Attribute传递到JSP页面中。
 97      * @return
 98      */
 99     @ModelAttribute("age")
100     public int getAge(){
101         return 25;
102     }
103     
104     /**
105      * 传出参数方式三：使用ModelAttribute传出参数
106      * 需要注意的是：@ModelAttribute括号里面的名字应该与表单name保持一致
107      * @param userName
108      * @param password
109      * @return
110      */
111     @RequestMapping("/test6.do")
112     public ModelAndView test6(
113             @ModelAttribute("userName") String userName,
114             @ModelAttribute("password") String password){
115             
116         return new ModelAndView("jsp/success");
117     }
118     
119     ////////////////////////////////////////////////////////////
120     /*以下是对【session  和  重定向  的研究】*/
121     
122     /**
123      * session的使用
124      * 可以利用session传递参数
125      */
126     @RequestMapping("test7.do")
127     public ModelAndView test7(HttpServletRequest request){
128         
129         String userName = request.getParameter("userName");
130         String password = request.getParameter("password");
131         
132         HttpSession session = request.getSession();
133         
134         session.setAttribute("sal", 8000);
135         session.setAttribute("userName", userName);
136         session.setAttribute("password", password);
137         
138         return new ModelAndView("jsp/success");
139     }
140     
141     /**
142      * 测试String
143      * @param user
144      * @param modelmap
145      * @return
146      */
147     @RequestMapping("test8.do")
148     public String test8(User user, ModelMap modelmap){
149         modelmap.addAttribute("user", user);
150         return "jsp/success";
151     }
152     
153     /**
154      * 返回错误页面
155      * @return
156      */
157     @RequestMapping("test9.do")
158     public String test9(){
159         return "jsp/error";
160     }
161     
162     /**
163      * 重定向方式一：利用RedirectView重定向
164      * @param user
165      * @return
166      */
167     @RequestMapping("test10.do")
168     public ModelAndView test10(User user){
169         if(user.getuserName().equals("java")){
170             return new ModelAndView("jsp/success");
171         }
172         return new ModelAndView(new RedirectView("test9.do"));
173     }
174     
175     /**
176      * 重定向方式二：利用redirect：前缀重定向
177      * 结果和方式一完全一样
178      * @param user
179      * @return
180      */
181     @RequestMapping("test11.do")
182     public String test11(User user){
183         if("java".equals(user.getuserName())){
184             return "jsp/success";
185         }
186         return "redirect:test9.do";
187     }
188 }
HelloController【重要】
 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'index.jsp' starting page</title>
13     <meta http-equiv="pragma" content="no-cache">
14     <meta http-equiv="cache-control" content="no-cache">
15     <meta http-equiv="expires" content="0">    
16     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
17     <meta http-equiv="description" content="This is my page">
18     <!--
19     <link rel="stylesheet" type="text/css" href="styles.css">
20     -->
21   </head>
22   
23   <body>
24       <h2>测试</h2>
25       <!--  
26       <a href="demo/test1.do">点击我试试</a>
27       -->
28       <hr>
29   
30     <form action="demo/test11.do" method="post">
31         <label id="userName">用户名：</label><input type="text" name="userName"/><br/>
32         <label id="password">密&nbsp;&nbsp;码：</label><input type="password" name="password"/><br/>
33         <input type="submit" value="登录"/>
34     </form>
35   </body>
36 </html>
index.jsp
 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'MyJsp.jsp' starting page</title>
13     
14     <meta http-equiv="pragma" content="no-cache">
15     <meta http-equiv="cache-control" content="no-cache">
16     <meta http-equiv="expires" content="0">    
17     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
18     <meta http-equiv="description" content="This is my page">
19     <!--
20     <link rel="stylesheet" type="text/css" href="styles.css">
21     -->
22 
23   </head>
24   
25   <body>
26        <h2>是否成功：${success}</h2>
27        <h2>提示消息：${message}</h2>
28        
29        <hr/>
30        
31        <h2>年龄：${age}</h2>
32        
33        <h2>用户名：${userName}</h2>
34        <h2>密码：${user.password}</h2>
35        
36        <h2>薪资：${sal}</h2>
37        
38        <h2>对象：${user.userName}</h2>
39   </body>
40 </html>
success.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10     不好，页面被外星人劫持！
11 </body>
12 </html>
error.jsp

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posted @ 2016-08-11 19:45  叶莜落  阅读(221)  评论(0)    收藏  举报