1.绑定默认数据类型
当前端请求参数较为简单的时候，后台形参可以直接使用SpringMVC提供的参数类型来绑定数据。
HttpServletRequest：通过request对象获取请求信息；
HttpServletResponse: 通过response处理响应对象；
HttpSession: 通过session对象得到session中存储的对象；
Model/ModelMap: Model是一个接口，ModelMap是一个接口的实现，作用是将Model数据填充到request域；
eg:
@Controller public class UserController{ @RequestMapping("/selectUser") public String selectUser(HttpServletRequest request){ String id=request.getParamter("id"); return "success"; } }
2.绑定简单数据类型
对应的前端请求路径模式：
http://localhost:8080/projectName/selectUser?user_id=1
后台控制器如下：
@Controller public class UserController{ @RequestMapping("/selectUser") public String selectUser(@RequestParam Integer id){ System.out.println("id="+id); return "success"; } }
3.绑定POJO类型
传递多个参数时候，可以考虑用POJO类型。
eg:
User.java
package com.sjl.POJO; import java.io.Serializable; /*对多个数据进行封装*/ public class User implements Serializable { private Integer id; private String username; private Integer password; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public Integer getPassword() { return password; } public void setPassword(Integer password) { this.password = password; } @Override public String toString() { return "User{" + "id=" + id + ", username=‘" + username + ‘\‘‘ + ", password=" + password + ‘}‘; } }
UserController.java
......
/** * 向用户注册页面跳转 * */ @RequestMapping("/toRegister") public String toRegister(){ return "register"; } /** * 接收用户注册信息 * */ @RequestMapping("/registerUser") public String selectUser(User user){ String username=user.getUsername(); Integer password=user.getPassword(); System.out.println("username:"+username); System.out.println("password:"+password); return "success"; }
......
register.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>注册</title> </head> <body> <form action="${pageContext.request.contextPath}/registerUser" method="post"> 用户名:<input type="text" name="username"/><br/> 密 码：<input type="text" name="password"><br/> <br/> <input type="submit" value="注册"> </form> </body> </html>
success.jsp
<%@ page contentType="text/html;charset=UTF-8" %>
<html>
<head>
<title>结果页面</title>
</head>
<body>
<h1 align="center">OK！</h1>
</body>
</html>
未完待补充！
原文：https://www.cnblogs.com/shijinglu2018/p/10389325.html