Spring MVC的标签库——form和input

我就是我 2021-07-24 12:06 388阅读 0赞

**一 控制器**

package org.fkit.controller;
    
    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="/registerForm")
         public String registerForm(Model model) {
             User user = new User("jack","男",28);
             // model中添加属性command，值是user对象
             model.addAttribute("command",user);
             return "registerForm";
         }
         
         @GetMapping(value="/registerForm2")
         public String registerForm2(Model model) {
             User user = new User("jack","男",28);
             // model中添加属性user，值是user对象
             model.addAttribute("user",user);
             return "registerForm2";
         }
    
    }

**二 领域模型**

package org.fkit.domain;
    import java.io.Serializable;
    
    // 域对象，实现序列化接口
    public class User implements Serializable{
         
         private static final long serialVersionUID = 1L;
         
         // 私有字段
         private String username;
         private String sex;
         private Integer age;
         
         public User() {
               super();
         }
         public User(String username, String sex, Integer age) {
               super();
               this.username = username;
               this.sex = sex;
               this.age = age;
         }
         public String getUsername() {
               return username;
         }
         public void setUsername(String username) {
               this.username = username;
         }
         public String getSex() {
               return sex;
         }
         public void setSex(String sex) {
               this.sex = sex;
         }
         public Integer getAge() {
               return age;
         }
         public void setAge(Integer age) {
               this.age = age;
         }
         
         @Override
         public String toString() {
               return "User [username=" + username + ", sex=" + sex  + ", age=" + age
                         + "]";
         }
         
         
         
    }

**三 视图**

1 registerForm.jsp

<%@ 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form标签</title>
    </head>
    <body>
    <h3>注册页面</h3>
    <form:form  method="post" action="register" >
         <table>
               <tr>
                    <td>姓名:</td>
                    <td><form:input path="username"/></td>
               </tr>
               <tr>
                    <td>性别:</td>
                    <td><form:input path="sex"/></td>
               </tr>
               <tr>
                    <td>年龄:</td>
                    <td><form:input path="age"/></td>
               </tr>
         </table>
    </form:form>
    </body>
    </html>

2 registerForm2.jsp

<%@ 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form标签</title>
    </head>
    <body>
    <h3>注册页面</h3>
    <form:form modelAttribute="user" method="post" action="register"  >
         <table>
               <tr>
                    <td>姓名:</td>
                    <td><form:input path="username"/></td>
               </tr>
               <tr>
                    <td>性别:</td>
                    <td><form:input path="sex"/></td>
               </tr>
               <tr>
                    <td>年龄:</td>
                    <td><form:input path="age"/></td>
               </tr>
         </table>
    </form:form>
    </body>
    </html>

**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 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/3edf7f8b19e2429584299cff6758d31d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/93e61105820b48c0a32bb5e01b0fc27f.png