SpringMVC:基于POJO接收请求参数

基于POJO类型接收Client请求参数：

在实际中如果涉及到，网络通信、或者集群操作或者集群复制的话 这样的对象需要对其进行序列化，就需要实现Serializable接口；

 

POJO:User

package com.baizhiedu;

public class User {
    private String name;
    private String password;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                '}';
    }
}

ParamController：param4

package com.baizhiedu;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller
@RequestMapping("/param")
public class ParamController {

    //通过request获取求情参数
    @RequestMapping("/param1")
    public String param1(HttpServletRequest request){
        String name=request.getParameter("name");
        String password=request.getParameter("password");

        System.out.println("name="+name);
        System.out.println("password="+password);

        return "param1";
    }

    //通过简单变量，获取请求参数
    @RequestMapping("/param2")
    public String param2(String name,String password){
        System.out.println("name="+name+" password="+password);
        return "param1";
    }

    //通过简单变量，获取请求参数,把http协议 传过来的字符串年龄，自动类型转换为整型
    @RequestMapping("/param3")
    public String param3(String name,Integer age){ //基本数据类型尽量使用包装器，如果不使用基本数据的包装类，如果在地址栏传值时没有给年龄int类型传值，默认为null,int类型不能接收null导致报错
        System.out.println("name="+name+"age="+age);
        return "param1";
    }

    //接收POJO类型的参数
    @RequestMapping("/param4")
    public String param4(User user){
        System.out.println("User="+user);
        return "param1";
    }

    //接收简单类型参数， POJO类型的参数
    @RequestMapping("/param4")
    public String param5(String name,User user){ //name形参和POJO里面的name属性都会获取内容
        System.out.println("User="+user);
        return "param1";
    }
}

form.jsp:

<%--
  Created by IntelliJ IDEA.
  User: DELL
  Date: 2022/6/3
  Time: 15:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>


    
    


   

       UserName:

       Password:

       Age: