SpringMVC获取表单数据（radio和checkbox）

1、实体类

代码语言：javascript复制

package cn.hadron.bean;

import java.io.Serializable;
import java.util.Arrays;

/**
 * create table users(
     id int auto_increment primary key,
     username varchar(45),
     password varchar(45),
     age int default 0
   );
   insert into users(username,password,age) values('hadron','123',18);
 * @author chengyq
 *
 */

// 域对象，实现序列化接口
public class UserBean implements Serializable {

    private Integer id;
    private String username;
    private String password;
    private String birthday;
    private Integer age;
    //测试单选按钮
    private String sex;
    //测试复选按钮
    private String[] favorite;

    public UserBean() {}
    public UserBean(String username, String password,int age) {
        this.username = username;
        this.password = password;
        this.age=age;
    }
    public UserBean(String username, String birthday,String sex) {
        this.username = username;
        this.birthday = birthday;
        this.sex=sex;
    }
    public Integer getId() {
        return id;
    }
    public String getUsername() {
        return username;
    }
    public String getPassword() {
        return password;
    }
    public Integer getAge() {
        return age;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
    public String[] getFavorite() {
        return favorite;
    }

    public void setFavorite(String[] favorite) {
        this.favorite = favorite;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "UserBean{"  
                "id="   id  
                ", username='"   username   '''  
                ", password='"   password   '''  
                ", birthday='"   birthday   '''  
                ", age="   age  
                ", sex='"   sex   '''  
                ", favorite="   Arrays.toString(favorite)  
                '}';
    }
}

2、控制器

代码语言：javascript复制

package cn.hadron.controller;

import cn.hadron.bean.UserBean;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.ArrayList;
import java.util.List;

@Controller
@RequestMapping(value = "/f")
public class FormController {

    @RequestMapping(value="/getEditPage",method= RequestMethod.GET)
    public String getEditPage(Model model) {
        System.out.println("表单测试");
        UserBean user = new UserBean("jack","1997-7-1","女");
        // model中添加属性user，值是user对象
        model.addAttribute("user",user);
        //返回Edit.jsp页面
        return "edit";
    }

    @RequestMapping(value="/edit",method=RequestMethod.POST)
    public String edit(@ModelAttribute UserBean user,Model model) {
        System.out.println("获取表单数据：");
        //@ModelAttribute注解指示了参数应该从模型（这里所说的“模型”指 Model）中获取
        model.addAttribute("username", user.getUsername());
        model.addAttribute("birthday", user.getBirthday());
        model.addAttribute("sex", user.getSex());
        model.addAttribute("favorite", user.getFavorite());
        System.out.println("user=" user);
        //返回userPage.jsp页面
        return "userPage";
    }

    /**
     * 可以用@ModelAttribute注解的方法做一些初始化操作。
     * 当同一个controller中有多个方法被@ModelAttribute注解标记，
     * 所有被@ModelAttribute标记的方法均会被执行，按先后顺序执行，然后再进入请求的方法
     * @return
     */
    @ModelAttribute("webList")
    public List<String> getWebList() {
        List<String> webList = new ArrayList<String>();
        webList.add("SpringMVC");
        webList.add("SpringBoot");
        webList.add("SpringCloud");
        return webList;
    }
}

3、页面

代码语言：javascript复制

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>测试form标签</title>
</head>
<body>
<h3>用户信息编辑页面</h3>
<form:form modelAttribute="user" method="post" action="/elastic/f/edit.do" >
    <table>
        <tr>
            <td>姓名:</td>
            <td><form:input path="username"/></td>
        </tr>
        <tr>
            <td>性别:</td>
            <td>
                <form:radiobutton path="sex" value="男" label="男" />
                <form:radiobutton path="sex" value="女" label="女" />
            </td>
        </tr>
        <tr>
            <td>生日:</td>
            <td><form:input path="birthday"/></td>
        </tr>
        <tr>
            <td>爱好:</td>
            <td><form:checkboxes items="${webList}" path="favorite" /></td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" value="提交变更"/>
            </td>
        </tr>
    </table>
</form:form>
</body>
</html>

代码语言：javascript复制

<%--
  Created by IntelliJ IDEA.
  User: chengyq
  Date: 2018/9/3
  Time: 14:27
  To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>您提交的用户信息</h2>
<table>
    <tr>
        <td>Username</td>
        <td>${username}</td>
    </tr>
    <tr>
        <td>Birthday</td>
        <td>${birthday}</td>
    </tr>
    <tr>
        <td>Sex</td>
        <td>${sex}</td>
    </tr>
    <tr>
        <td>favorite</td>
        <td>
            <%
                String[] favorite = (String[])request.getAttribute("favorite");
                for(String f: favorite) {
                    out.println(f);
                }
            %>
        </td>
    </tr>
</table>
</body>
</html>

checkbox

0 人点赞