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封装表单案例

2024-08-25 09:04:24   220人阅读

将页面的数据封装到表单中

register.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href=http://www.mamicode.com/"<%=basePath%>">
    
    <title>My JSP ‘register.jsp‘ starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href=http://www.mamicode.com/"styles.css">
    -->

  </head>
  
  <body>
   
   <form action="/app/servlet/requestDemo3" method="post">
         姓名：<input type="text" name="username"><br>
         密码：<input type="password" name="password"><br>
         确认密码：<input type="password" name="password"><br>
         性别：<input type="radio" name="gander" value=http://www.mamicode.com/"男" >男
             <input type="radio" name="gander" value=http://www.mamicode.com/"女">女<br>
         爱好：<input type="checkbox" name="loves" value=http://www.mamicode.com/"打篮球">打篮球
             <input type="checkbox" name="loves" value=http://www.mamicode.com/"踢足球">踢足球
             <input type="checkbox" name="loves" value=http://www.mamicode.com/"抱孩子">抱孩子<br>
         国籍：<select name="country">
                 <option value=http://www.mamicode.com/"中国">中国</option>
                 <option value=http://www.mamicode.com/"美国">美国</option>
                 <option value=http://www.mamicode.com/"加拿大">加拿大</option>
                 <option value=http://www.mamicode.com/"日本">日本</option>
                 <option value=http://www.mamicode.com/"韩国">韩国</option>
                 <option value=http://www.mamicode.com/"俄罗斯">俄罗斯</option><br>
         </select>
         备注:<textarea rows="5" cols="20" name="description">大家一起去请两天假</textarea><br>
         <input type="submit" value=http://www.mamicode.com/"提交"><br>
   </form>
   
  </body>
</html>

User.java

package bean;

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

/**
 * javabean
 * @author kj
 *
 */
public class User implements Serializable{

    private String username;
    private String[] password;
    private String gander;
    private String[] loves;
    private String country;
    private String description;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String[] getPassword() {
        return password;
    }
    public void setPassword(String[] password) {
        this.password = password;
    }
    public String getGander() {
        return gander;
    }
    public void setGander(String gander) {
        this.gander = gander;
    }
    public String[] getLoves() {
        return loves;
    }
    public void setLoves(String[] loves) {
        this.loves = loves;
    }
    public String getCountry() {
        return country;
    }
    public void setCountry(String country) {
        this.country = country;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    @Override
    public String toString() {
        return "User [username=" + username + ", password="
                + Arrays.toString(password) + ", gander=" + gander + ", loves="
                + Arrays.toString(loves) + ", country=" + country
                + ", description=" + description + "]";
    }    
}

requestDeom3.java    (Servlet类)

public class requestDemo3 extends HttpServlet {

    /**
     * 演示封装表单中的数据
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        request.setCharacterEncoding("UTF-8");
        User user = new User();
        
        //将表单数据封装到user对象中
        try {
            BeanUtils.populate(user, request.getParameterMap());
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("-----封装后-----" + user);
    }

 

封装表单案例


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