【SpringBoot学习】03、注册（一）：表单信息封装成类传入Controller

• • 1 实体类DemoUser
  • 2 Controller
  • 3 前端页面
  • 4 测试

package com.nowcoder.community.entity;

public class DemoUser {
    private int id;
    private String username;
    private String password;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "DemoUser{" +
                "id=" + id +
                ", username='" + username + ''' +
                ", password='" + password + ''' +
                '}';
    }
}

//测试将数据封装成DemoUser传入Controller
    @RequestMapping(path = "/regist",method = RequestMethod.POST)
    @ResponseBody
    public Map test(DemoUser user){
        Map map = new HashMap<>();
        if(user==null){
            map.put("error","未收到DemoUser类");
        }else{
            map.put("success","收到DemoUser类");
            System.out.println(user);
        }
        return map;
    }

    
    



    用户名:

    密码: 

    

该页面的路径为static/html/demo-regist.html
用localhost://8080/community/html/demo-regist.html可以访问到。community是项目名

证明底层确实可以将表单提交的数据封装成类传给Controller
猜想过程是：请求提交后DispatcherServlet传给相应的Controller方法，该方法的输入参数有User，那就从表单提交的数据里匹配User类的属性，前端的name值与User类的属性名一致就将起赋值给该属性，这样将数据封装成User类再传给Controller方法
要看源码确认