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request--各种表单输入项数据的获取 学习笔记

发布时间:2020-06-11 23:22:36 来源:网络 阅读:420 作者:知止内明 栏目:web开发

html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>index.html</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <form action="/day04/Rdome5" method="post">
        <table border="1" align="center">
            <caption>用户注册</caption>
            <tr>
                <th>用户名</th>
                <td><input type="text" name="username"/></td>
            </tr>
            <tr>
                <th>密码</th>
                <td><input type="password" name="password"/></td>
            </tr>
            <tr>
                <th>性别</th>
                <td>
                    <input checked type="radio" name="gender" value="male"/>男
                    <input type="radio" name="gender" value="female"/>女
                </td>
            </tr>
            <tr>
                <th>爱好</th>
                <td>
                    <input type="checkbox" name="likes" value="sing"/>唱歌
                    <input type="checkbox" name="likes" value="dance"/>跳舞
                    <input type="checkbox" name="likes" value="play"/>打球
                    <input type="checkbox" name="likes" value="net"/>上网
                </td>
            </tr>
            <tr>
                <th>上传文件</th>
                <td><input type="file" name="upfile"/></td>
            </tr>
            <tr>
                <th>城市</th>
                <td>
                    <select name="city">
                        <option value="bj" selected>北京</option>
                        <option value="sh">上海</option>
                        <option value="gz" >广州</option>
                        <option value="cq">重庆</option>
                    </select>
                </td>
            </tr>
            <tr>
                <th>留言</th>
                <td>
                    <textarea name="message" rows="5" cols="20"></textarea>
                </td>
            </tr>
            <tr>    
                <td>
                    <input type="hidden" name="id" value="20111008"/>
                </td>   
            </tr>               
            <tr>
                <td colspan="2" align="center">
                    <input type="submit" value="提交"/>
                        &nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="reset" value="重填"/>
                </td>
            </tr>   
        </table>
    </form>
  </body>
</html>

request--各种表单输入项数据的获取 学习笔记

java

package cn.web.request;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Rdome5 extends HttpServlet {

    public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {

        //将[请求体]的中文以UTF-8方式重新编码
        request.setCharacterEncoding("UTF-8");
        ///this.getServletContext().getRequestDispatcher("/download.html").forward(request, response);

        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String gender = request.getParameter("gender");
        String[] likes = request.getParameterValues("likes");
        String upfile = request.getParameter("upfile");
        String city = request.getParameter("city");
        String message = request.getParameter("message");
        String id = request.getParameter("id");

        //控制台输出
        System.out.println("username="+username);
        System.out.println("password="+password);
        System.out.println("gender="+gender);
        System.out.println("likes="+likes.length);
        System.out.println("upfile="+upfile);
        System.out.println("city="+city);
        System.out.println("message="+message);
        System.out.println("id="+id);
    }

}

结果:

username=234324
password=234
gender=male
likes=1
upfile=
city=bj
message=23432
id=20111008
username=234324
password=234
gender=male
likes=1
upfile=
city=bj
message=23432
id=20111008

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