Spring MVC学习02请求参数接收

新建实体类，User和UserList

package com.yas.entity;

import java.util.Date;

public class User {
    private Integer id;
    private String name;
    private Boolean gender;
    private Date birth;

    public User() {
    }

    public User(Integer id, String name, Boolean gender, Date birth) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.birth = birth;
    }

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Boolean getGender() {
        return gender;
    }

    public void setGender(Boolean gender) {
        this.gender = gender;
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", gender=" + gender +
                ", birth=" + birth +
                '}';
    }
}

package com.yas.entity;

import java.util.ArrayList;
public class UserList {
    private ArrayList<User> users;

    public ArrayList<User> getUsers() {
        return users;
    }

    public void setUsers(ArrayList<User> users) {
        this.users = users;
    }
}

建立用于测试的Controller：ParamController 

package com.yas.controller;

import com.yas.entity.User;
import com.yas.entity.UserList;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.Date;

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

    // http://localhost:8080/param/test1?id=1&name=zhangsan&gender=true&birth=2021/10/26
    @RequestMapping("/test1")
    public String test1(@RequestParam("id") Integer id,
                        @RequestParam("name") String name,
                        @RequestParam("gender") Boolean gender,
                        @RequestParam("birth") Date birth){
        System.out.println(id);
        System.out.println(name);
        System.out.println(gender);
        System.out.println(birth);

        return "hello";
    }

    // http://localhost:8080/param/test2?id=1&name=zhangsan&gender=true&birth=2021/10/26
    @RequestMapping("/test2")
    public String test2(User user){
        System.out.println(user.getId());
        System.out.println(user.getName());
        System.out.println(user.getGender());
        System.out.println(user.getBirth());

        return "hello";
    }

    // http://localhost:8080/param/test3?hobby=football&hobby=basketball&hobby=volleyball
    @RequestMapping("/test3")
    public String test3(@RequestParam("hobby") String[] hobby){
        for(String h : hobby){
            System.out.println(h);
        }
        return "hello";
    }

    // http://localhost:8080/param.jsp
    @RequestMapping("/test4")
    public String test4(UserList userList){
        if(userList!=null) {
            for (User user : userList.getUsers()) {
                System.out.println(user.toString());
            }
        }
        return "hello";
    }

    // http://localhost:8080/param/test5/1
    @RequestMapping("/test5/{id}")
    public String test5(@PathVariable("id") Integer id){
        System.out.println(id);
        return "hello";
    }

    // http://localhost:8080/param/test6/1/zhangsan
    @RequestMapping("/test6/{id}/{name}")
    public String test5(@PathVariable("id") Integer id,
                        @PathVariable("name") String name){
        System.out.println(id);
        System.out.println(name);
        return "hello";
    }
}

建立测试用jsp页面

<%--
  Created by IntelliJ IDEA.
  User: yanga
  Date: 2021/10/26
  Time: 11:30
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>prarm.jsp</title>
</head>
<body>
<%--    <form action="${pageContext.request.contextPath}/param/test3">--%>
<%--        <input type="checkbox" name="hobby" value="football"> 足球--%>
<%--        <input type="checkbox" name="hobby" value="basketball"> 篮球--%>
<%--        <input type="checkbox" name="hobby" value="volleyball"> 排球--%>

<%--        <input type="submit" value="提交">--%>
<%--    </form>--%>

<form action="${pageContext.request.contextPath}/param/test4" method="post">
    id:<input type="text" name="users[0].id" value="1"><br>
    name:<input type="text" name="users[0].name" value="zhangsan"><br>
    gender:<input type="text" name="users[0].gender" value="true"><br>
    <hr>
    id:<input type="text" name="users[1].id" value="2"><br>
    name:<input type="text" name="users[1].name" value="lisi"><br>
    gender:<input type="text" name="users[1].gender" value="false"><br>

    <input type="submit" value="提交">
</form>

</body>
</html>

修改web.xml，添加post请求包含中文的编码处理：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <!--configure the setting of springmvcDispatcherServlet and configure the mapping-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:mvc.xml</param-value>
        </init-param>
        <!-- <load-on-startup>1</load-on-startup> -->
    </servlet>

    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 配置springMVC编码过滤器 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 设置过滤器中的属性值 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <!-- 启动过滤器 -->
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <!-- 过滤所有请求 -->
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>