Spring MVC的checkbox标签使用

我就是我 2021-07-24 13:26 445阅读 0赞

**一 视图**

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@ taglib prefix="form"  uri="http://www.springframework.org/tags/form" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html;  charset=UTF-8">
    <title>测试checkbox标签</title>
    </head>
    <body>
    <h3>form:checkbox测试</h3>
    <form:form modelAttribute="user" method="post"  action="checkboxForm" >
         <table>
               <tr>
                    <td>选择课程:</td>
                    <td>
                         <form:checkbox path="courses"  value="JAVAEE" label="JAVAEE"/> 
                         <form:checkbox path="courses"  value="Mybatis" label="Mybatis"/> 
                         <form:checkbox path="courses"  value="Spring" label="Spring"/> 
                    </td>
               </tr>
         </table>
         <form:checkbox path="reader" value="true"/>已经阅读相关协议
    </form:form>
    </body>
    </html>

**二 控制器**

package org.fkit.controller;
    
    import java.util.ArrayList;
    import java.util.List;
    import org.fkit.domain.User;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.GetMapping;
    
    
    /**
    *  HelloWorldController是一个基于注解的控制器,
    *  可以同时处理多个请求动作，并且无须实现任何接口。
    *  org.springframework.stereotype.Controller注解用于指示该类是一个控制器
    */
    @Controller
    public class UserController{
         
         @GetMapping(value="/checkboxForm")
         public String registerForm(Model model) {
             User user = new User();
             // 设置boolean变量reader的值为true，页面的checkbox复选框会被选中
             user.setReader(true);
             // 为集合变量courses添加“JAVAEE”和“Spring”，页面的checkbox复选框这两项会被选中
             List<String> list = new ArrayList<String>();
             list.add("JAVAEE");
             list.add("Spring");
             user.setCourses(list);
             // model中添加属性command，值是user对象
             model.addAttribute("user",user);
             return "checkboxForm";
         }
         
    
    }

**三 领域类**

package org.fkit.domain;
    
    import java.io.Serializable;
    import java.util.List;
    
    // 域对象，实现序列化接口
    public class User implements Serializable{
    
        private static final long serialVersionUID = 1L;
        
        private boolean reader;
        private List<String> courses;
        
        public User() {
            super();
        }
    
    
        public boolean isReader() {
            return reader;
        }
    
    
        public void setReader(boolean reader) {
            this.reader = reader;
        }
    
    
        public List<String> getCourses() {
            return courses;
        }
    
    
        public void setCourses(List<String> courses) {
            this.courses = courses;
        }
    }

**四 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/a8b4037ede6445f9a6b75ff8100429d8.png