SpringMVC快速入门示例

╰+哭是因爲堅強的太久メ 2022-04-12 12:48 209阅读 0赞

作者：http://wallimn.iteye.com，时间：2016-02-15  
  
　　一个很简单的SpringMVC示例，注意，很简单，仅具演示作用。  
　　用eclipse建立一个dynamic web project，加入相应包，Servlet的版本使用3.0，比较简单，不过多介绍。项目的文件结构如下图所示：  
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\[img\]http://dl2.iteye.com/upload/attachment/0115/1084/b442c43a-57d1-327c-a971-022e6c53e99b.png\[/img\]  
\[/align\]  
  
　　下面介绍一下文件内容。  
\[b\]1. web.xml\[/b\]  
主要是配置了Spring的Servlet，指定其处理\*.do的请求，注意Servlet的名称为spring，收到相应的请求后，会使用\[ServletName\]-servlet.xml解析对应的请求，也就是sping-servlet.xml。还配置了一个过滤器，解决中文乱码问题。

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xmlns="http://java.sun.com/xml/ns/javaee"
    	xsi:schemaLocation="
    		http://java.sun.com/xml/ns/javaee
    		http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    	id="WebApp_ID" version="3.0">
    
    	<display-name>SpringMVC</display-name>
    
    	<servlet>
    		<servlet-name>spring</servlet-name>
    		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    		<load-on-startup>1</load-on-startup>
    	</servlet>
    	<servlet-mapping>
    		<servlet-name>spring</servlet-name>
    		<url-pattern>*.do</url-pattern>
    	</servlet-mapping>
    
    	<filter>
    		<filter-name>encodingFilter</filter-name>
    		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    		<init-param>
    			<param-name>encoding</param-name>
    			<param-value>UTF-8</param-value>
    		</init-param>
    		<init-param>
    			<param-name>forceEncoding</param-name>
    			<param-value>true</param-value>
    		</init-param>
    	</filter>
    
    	<filter-mapping>
    		<filter-name>encodingFilter</filter-name>
    		<url-pattern>/*</url-pattern>
    	</filter-mapping>
    
    	<welcome-file-list>
    		<welcome-file>index.jsp</welcome-file>
    	</welcome-file-list>
    </web-app>

\[b\]2. spring-servlet.xml\[/b\]

\[b\]3. user/show.jsp\[/b\]  
显示用户的信息

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
    <!DOCTYPE html>
    <html lang="zh-CN">
      <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>显示用户信息</title>
    
      </head>
      <body>
        <h3 style="text-align:center;border-bottom:1px solid gray;">用户信息</h3>
    	<div style="text-align:center">
    	用户ID：${user.id }
    	<br>
    	用户名：${user.name}
    	<br>
    	密　码：${user.password}
    	</div>
      </body>
    </html>

\[b\]4. user/register.jsp\[/b\]  
用户注册信息输入页面

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
    <!DOCTYPE html>
    <html lang="zh-CN">
      <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>显示用户信息</title>
    
      </head>
      <body>
        <h3 style="text-align:center;border-bottom:1px solid gray;">用户注册</h3>
    	<div style="text-align:center">
    		<form action="register.do" method="post">
    			用户名：<input type="text" name="name">
    			<br>
    			密　码：<input type="password" name="password">
    			<br>
    			<input type="submit" value="提交"> 
    		</form>
    	</div>
      </body>
    </html>

\[b\]4. UserController.java\[/b\]

package com.wallimn.controller;
    
    import java.util.HashMap;
    import java.util.Map;
    import java.util.UUID;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.servlet.ModelAndView;
    
    @Controller
    @RequestMapping("/user")
    /**
     * 
     * @author http://wallimn.iteye.com
     *
     */
    public class UserController {
       
    
    	/**
    	 * 显示指定的用户信息
    	 * @param userId
    	 * @return
    	 */
    	@RequestMapping("/show/{userId}")
    	public ModelAndView show(@PathVariable String userId){
       
    		Map<String,Object> user = new HashMap<String,Object>();
    		user.put("id", userId);
    		user.put("name", "wallimn");
    		user.put("password", "password");
    		return new ModelAndView("user/show","user",user);
    	}
    	/**
    	 * 显示用户注册界面
    	 * @param name
    	 * @param password
    	 * @return
    	 */
    	@RequestMapping(value="/register",method = RequestMethod.GET)
    	public String register_get(String name,String password){
       
    		return "user/register";
    	}
    	/**
    	 * 用户注册处理
    	 * @param name
    	 * @param password
    	 * @return
    	 */
    	@RequestMapping(value="/register",method = RequestMethod.POST)
    	public ModelAndView register_post(String name,String password){
       
    		Map<String,Object> user = new HashMap<String,Object>();
    		user.put("id", UUID.randomUUID().toString());
    		user.put("name", name);
    		user.put("password", password);
    		return new ModelAndView("user/show","user",user);
    	}
    }

\[b\]5. index.jsp\[/b\]  
欢迎页面，显示两个链接，方便查看效果

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
    <!DOCTYPE html>
    <html lang="zh-CN">
      <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>SpringMVC首页</title>
    
      </head>
      <body>
        <h3 style="text-align:center;border-bottom:1px solid gray;">请点击以下链接</h3>
    	<div style="text-align:center">
    	<a href="user/show/1.do">查看用户信息</a>
    	<a href="user/register.do">用户注册</a>
    	</div>
      </body>
    </html>