RequestMapping注解的几个属性和作用位置

1.项目目录

2.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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>SpringMVC02</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    </servlet>

    <!-- Map all requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

3.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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
    <!-- 扫描组件 -->
    <context:component-scan base-package="com.atguigu.controller"></context:component-scan>
    
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

4.index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <a href="test">测试springMVC</a>
    
    <br>
    
    <form action="test" method="post">
        <input type="submit" value="测试POST">
    </form>
</body>
</html>

5.success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <h1>成功</h1>
</body>
</html>

6.TestController.java

package com.atguigu.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
//@RequestMapping("/mvc")
public class TestController {
    /**
     * @RequestMapping:设置请求映射，把请求和控制层中的方法设置映射关系
     * 当请求路径和@RequestMapping的value属性一致时，则该注解所标注的方法即为处理请求的方法
     * 
     * @RequestMapping可以加在类上，也可以加在方法上
     * 若类和方法上都加有，应该一层一层的访问，西安访问类，再访问类中的方法
     * 
     * method:用来设置请求方式，只有客户端发送请求的方式和method的值一致，才能处理请求
     * 请求方式：GET查询    POST添加    PUT修改    DELETE删除
     * params:用来设置客户端传到服务器的数据，支持表达式
     * username !username username=admin username!=admin
     * headers:用来设置请求头信息，所发送的请求的请求头信息一定要个headers属性中所设置的一致
     */
//    @RequestMapping(value="/test", method=RequestMethod.POST)
//    public String testPOST(){
//        System.out.println("SUCCESS:POST");
//        return "success";
//    }
    
//    @RequestMapping(value="/test", method=RequestMethod.GET)
//    public String testGET(){
//        System.out.println("SUCCESS:GET");
//        return "success";
//    }
    
//    @RequestMapping(value="/test", params={"username", "!age", "sex!=1"})
//    public String testParams(){
//        System.out.println("SUCCESS");
//        return "success";
//    }
    
    @RequestMapping(value="/test", 
            headers={"Accept-Encoding=gzip, deflate"})
    public String testHeaders(){
        System.out.println("SUCCESS");
        return "success";
    }
    
    /**
    * springMVC支持Ant方式的请求路径
    * 在Ant中，有3个匹配符
    * *:任意字符
    * ?:任意一个字符
    * **:任意多层目录
    */
    //访问路径举例：localhost:8080/SpringMVC02/abc/ant11/a/b/testAnt
    @RequestMapping(value="/*/ant??/**/testAnt")
    public String testAnt(){
        System.out.println("SUCCESS:testAnt");
        return "success";
    }
    
    /**
     * 以前：localhost:8080/SpringMVC02/testREST?id=1001&username=admin
     * 现在：localhost:8080/SpringMVC02/testREST/1001/admin
     */
    @RequestMapping("/testREST/{id}/{username}")//占位符方式的路径
    public String testREST(@PathVariable("id")Integer id, @PathVariable("username")String username){
        System.out.println("id:"+id+",username="+username);
        return "success";
    }
}

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SpringMVC | RequestMapping注解的几个属性和作用位置

RequestMapping注解的几个属性和作用位置