一、复现上课案例
package com.example.spring.controller; import org.springframework.web.bind.annotation.*; @RestController public class HelloController { //添加一个简单的HelloController @RequestMapping("/hello") public String hello(){ System.out.println("Hello World122221 ~"); return "Hello World1234 ~"; } }reg1.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>用户注册</title> </head> <body> <h2>用户注册</h2> <%-- 表单数据提交到 /reg 这个URL，使用POST方法 --%> <form action="/reg1" method="post"> 姓名：<input type="text" name="name" /><br/><br/> 年龄：<input type="text" name="age" /><br/><br/> <input type="submit" value="提交注册" /> </form> </body> </html>reg-result1.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>注册结果</title> </head> <body> <h4>使用 request.getParameter() 获取参数值</h4> <h2>注册信息如下：</h2> <%-- 使用EL表达式显示Controller中存入Model的数据 --%> 姓名：${userName}<br/> 年龄：${userAge}<br/> <a href="/reg1">返回注册页面</a> </body> </html>RegrequestController.java
package com.example.spring.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import jakarta.servlet.http.HttpServletRequest; @Controller public class RegrequestController { // 处理访问 /reg 的GET请求，显示注册页面 @GetMapping("/reg1") public String showRegPage() { // 返回的逻辑视图名是 "reg"，根据配置会映射到 /WEB-INF/jsp/reg.jsp return "reg1"; } // 处理来自注册页面的POST表单提交 @PostMapping("/reg1") public String handleReg(HttpServletRequest request, Model model) { // 使用 request.getParameter() 获取参数值 String name = request.getParameter("name"); String ageParam = request.getParameter("age"); // 将年龄参数转换为 Integer 类型 Integer age = null; if (ageParam != null && !ageParam.isEmpty()) { age = Integer.parseInt(ageParam); } // 将接收到的数据存入Model，以便在结果页面上显示 model.addAttribute("userName", name); model.addAttribute("userAge", age); // 返回逻辑视图名 "reg-result"，映射到 /WEB-INF/jsp/reg-result.jsp return "reg-result1"; } }二、apifox中建立接口
三、完成新页面
reg3.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>用户注册reg3</title> </head> <body> <h2>3、完成新的页面</h2> <%-- method="post" 提交到当前 /reg3 --%> <form action="/reg3" method="post"> <p>姓名：<input type="text" name="name"></p> <p>年龄：<input type="text" name="age"></p> <p>性别： <input type="radio" name="gender" value="male" id="man"> <label for="man">男</label> <input type="radio" name="gender" value="female" id="woman"> <label for="woman">女</label> </p> <p><input type="submit" value="提交注册"></p> </form> </body> </html>reg-result3.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>注册结果</title> </head> <body> <h2>注册信息如下：</h2> <p>姓名：${username}</p> <p>年龄：${userAge}</p> <p>性别：${userGender}</p> <p><a href="/reg3">返回注册页面</a></p> </body> </html>Reg3Controller.java
package com.example.spring.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; @Controller @RequestMapping("/reg3") public class Reg3Controller { // 访问表单页面 GET @RequestMapping public String showForm(){ // 跳转到表单页面 reg3.jsp return "reg3"; } // 提交表单 POST @PostMapping public String submitReg( @RequestParam String name, @RequestParam int age, @RequestParam String gender, Model model ){ // 把参数传给结果页面 model.addAttribute("username", name); model.addAttribute("userAge", age); model.addAttribute("userGender", gender); // 跳转结果页 reg3-result.jsp return "reg-result3"; } }
