第一个servlet程序

时间：2025-04-26 13:37:08

在Eclipse中新建一个Dynamic Web Project

在WebContent下面添加index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!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>my first servlet test</title>

<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>

<script type="text/javascript">

    $(document).ready(function(){

        $("#btnSubmit").click(function(){

            var sN = $("#name").val();

            var wd = $("#pwd").val();

            $.ajax({

                type: "POST",//GET

                url: "servletExm",

                dataType: "text",

                data: "name="+sN+"&pwd="+wd,

                //dataType: "json",

                //data: {"name":sN,"pwd":wd},

                //url: "JqAjServlet.do?name="+$("[name=name]").val()+"&pwd="+$("[name=pwd]").val()+"&date="+new Date().getTime(),

                success: function(data){

                    $("#show").html(data);

                },

                error: function(){

                    $("#show").html("Error XMLHttpRequest");

                }

            });

        });

    });

</script>

</head>

<body>

   <table border="0">

    <tr><td>name:</td><td><input type="text" id="name"/></td></tr>

    <tr><td>password:</td><td><input type="password" id="pwd"/></td></tr>

    <tr><td></td><td><input type="button" id="btnSubmit" value="GETsubmit"/></td></tr>

   </table>

  <div id="show"></div>

</body>

</html>

添加一个Servlet文件

package package1;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

 * Servlet implementation class servletExm

 */

@WebServlet("/servletExm")

public class servletExm extends HttpServlet {

    private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public servletExm() {

        super();

        // TODO Auto-generated constructor stub

    }

    /**

     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

     */

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // TODO Auto-generated method stub

        //response.getWriter().append("Served at: ").append(request.getContextPath());

        doPost(request, response);

    }

    /**

     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

     */

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

        // TODO Auto-generated method stub

        //doGet(request, response);

        response.setContentType("application/text; charset=utf-8");

        PrintWriter out = response.getWriter();

        String name = request.getParameter("name");

        String pwd = request.getParameter("pwd");

        //System.out.println("name="+name+" pwd="+pwd);

        out.write("hello " + name + " 你的密码为" +pwd);

    }

}

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