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SpringMVC学习笔记（四）：地址映射RequestMapping

2017-05-27 19:13 661 查看
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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