SpringMVC学习笔记（四）：地址映射RequestMapping

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事例：查询，增加，更新

控制器：

package com.lin.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.servlet.ModelAndView;/** * 控制器 * user/list.do * user/add.do * user/update.do * @author h */@Controller@RequestMapping("/user")//请求地址一级映射,功能模块public class UserController {    @RequestMapping(value="/list",method=RequestMethod.GET)//请求地址二级映射并指定请求的参数为GET方式，如果不填表示两种请求方式都可以接收到    public ModelAndView list(){        System.out.println("--list users--");        ModelAndView mav = new ModelAndView("user_list");//视图modelAndView关联user_list.jsp        mav.addObject("user_list", "list users");//向关联的界面传递一个user_list数据        return mav;//跳转界面    }    @RequestMapping("/add")//请求地址二级映射    public ModelAndView add(){        System.out.println("--add users--");        ModelAndView mav = new ModelAndView("user_add");        mav.addObject("user_add", "add users");        return mav;    }    @RequestMapping("/update")//请求地址二级映射    public ModelAndView update(){        System.out.println("--update users--");        ModelAndView mav = new ModelAndView("user_update");        mav.addObject("user_update", "update users");        return mav;    }}

jsp界面

//index.jsp  <body>      <!--注意请求地址的写法-->    <a href="user/list.do">查询</a></br>    <a href="user/add.do">添加get方式</a></br>     <form action="user/add.do" method="post"><input type="submit" value="添加POST方式"/></form></br>    <a href="user/update.do">更新</a>  </body>//user_list.jsp<body>   <h1>${user_list }</h1>  </body>//user_add.jsp<body>   <h1>${user_add }</h1>  </body>//user_update.jsp<body>   <h1>${user_update }</h1>  </body>

springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:aop="http://www.springframework.org/schema/aop"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">    <!-- mvc 注解驱动 -->    <mvc:annotation-driven/>    <!-- 扫描器 -->    <context:component-scan base-package="com"></context:component-scan>    <!-- 配置视图解析器 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!-- 配置前缀和后缀 -->        <property name="prefix" value="/userInfo/"></property>        <property name="suffix" value=".jsp"></property>    </bean></beans>

web.xml

<?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>SpringMVC04</display-name>  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list>  <servlet>    <servlet-name>springmvc</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>springmvc</servlet-name>    <url-pattern>*.do</url-pattern>  </servlet-mapping>  <filter>    <filter-name>encodeFilter</filter-name>    <filter-class>com.lin.controller.EncodeFilter</filter-class>  </filter>  <filter-mapping>    <filter-name>encodeFilter</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping></web-app>

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