1@RequestMapping的位置
可以在类名或者方法名之前
或者同时加在两个位置
最终的路径是两个位置路径的组合
value是默认的名称，可以省略，如果有其他参数，就不能省略
如下配置的访问路径：协议://主机：//端口/虚拟路径/hello/world
package com.geyao.springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/hello")
public class HelloWorld {
@RequestMapping(value="/world")
public String helloworld(){
System.out.println("hello eorld");
return "helloworld";
}
}
2 @RequestMapping的请求方式
GET形式
@RequestMapping(value = "/helloworld",method = RequestMethod.GET)
Post形式
@RequestMapping(value = "/helloworld",method = RequestMethod.POST)
如果不指定merhod，那么可以接受任何请求
请求方式不对，报405错误
3处理请求参数
表单的controller和form
<%--
Created by IntelliJ IDEA.
User: geyao
Date: 2019/11/6
Time: 19:57
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="hi" method="post">
<label for="username">用户名<input type="text" id="username" name="username"></label>
<label for="password">密码<input type="text" id="password" name="password"></label>
<button>登录</button>
</form>
</body>
</html>
package wormday.springmvc.helloworld;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model; // 这里导入了一个Model类
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/hi")
public class HiController {
@RequestMapping("/say")
public String say(Model model) { // 参数中传入Model
model.addAttribute("name","wormday"); // 指定Model的值 model.addAttribute("url",); // 指定Model的值
return "say";
}
@RequestMapping("/loginForm")
public String loginForm(){
return "login";
}
@RequestMapping("/hi")
public String loginFor(){
return "hi";
}
@RequestMapping(value = "/login",method = RequestMethod.POST)
public String loginXS(){
// System.out.println("执行登录");
//System.out.println("username"+username);
//System.out.println("password"+password);
return "redirect:hi";
}
}
提交表单的controller
@RequestMapping(value = "/login",method = RequestMethod.POST)
public String loginXS(String username,String password){
System.out.println("执行登录");
System.out.println("username"+username);
System.out.println("password"+password);
return "redirect:hi";
}
}
4请求转发和跳转
5解决post乱码问题
6解决get乱码问题
