SpringMVC_04_RequestMapping注解的使用和属性
1.注解的使用
2.注解的属性
2.1使用method属性
package cn.itcast.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
//控制器类
@Controller
@RequestMapping(path = "/user")
public class HelloController {
@RequestMapping(path = "/hello",method = {RequestMethod.POST})
public String sayHello(){
System.out.println("Hello StringMVC");
return "success";
}
}
再重新部署项目,就请求失败了
2.2使用param属性
//控制器类
@Controller
@RequestMapping(path = "/user")
public class HelloController {
@RequestMapping(path = "/hello",params = {"username"})
public String sayHello(){
System.out.println("Hello StringMVC");
return "success";
}
}
jsp文件也需要有username属性,才能部署成功
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>入门程序</h3>
<a href="/user/hello?username">入门程序</a>
</body>
</html>
还可以给属性赋值
//控制器类
@Controller
@RequestMapping(path = "/user")
public class HelloController {
@RequestMapping(path = "/hello",params = {"username=123"})
public String sayHello(){
System.out.println("Hello StringMVC");
return "success";
}
}
当然jsp文件也需要相同的值,才能部署成功
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>入门程序</h3>
<a href="/user/hello?username=123">入门程序</a>
</body>
</html>
2.3使用Accept
//控制器类
@Controller
@RequestMapping(path = "/user")
public class HelloController {
@RequestMapping(path = "/hello",params = {"username=123"},headers = {"Accept"})
public String sayHello(){
System.out.println("Hello StringMVC");
return "success";
}
}
执行成功了,因为有请求头