1 <%@ page language="java" import="java.util.*" pageEncoding="gb2312" %>
2 <%@ page import=" java.net.*" %>
3
4
5 <html>
6 <head>
7 <script type="text/javascript">
8 function showHint(str)
9 {
10 var xmlhttp;
11 if (str.length==0)
12 {
13 document.getElementById("txtHint").innerHTML="";
14 return;
15 }
16 if (window.XMLHttpRequest)
17 {// code for IE7+, Firefox, Chrome, Opera, Safari
18 xmlhttp=new XMLHttpRequest();
19 }
20 else
21 {// code for IE6, IE5
22 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
23 }
24 xmlhttp.onreadystatechange=function()
25 {
26 if (xmlhttp.readyState==4 && xmlhttp.status==200)
27 {
28 document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
29 }
30 }
31
32 xmlhttp.open("GET","servlet/gethint?q="+str,true);
33 xmlhttp.send();
34 }
35 </script>
36 <title>验证码测试</title>
37 </head>
38 <body>
39 <h3>请输入字母（a-z）</h3>
40 <form action="">
41 姓名：<input type="text" id="text1" onkeyup="showHint(this.value)"/>
42 <p>建议：<span id="txtHint"></span></p>
43 </form>
44 </body>
45 </html>
1 package demoservlet;
2
3 import java.io.IOException;
4 import java.io.PrintWriter;
5
6 import javax.servlet.ServletException;
7 import javax.servlet.http.HttpServlet;
8 import javax.servlet.http.HttpServletRequest;
9 import javax.servlet.http.HttpServletResponse;
10
11 public class gethint extends HttpServlet {
12
13 /**
14 * Constructor of the object.
15 */
16 public gethint() {
17 super();
18 }
19
20 /**
21 * Destruction of the servlet. <br>
22 */
23 public void destroy() {
24 super.destroy(); // Just puts "destroy" string in log
25 // Put your code here
26 }
27
28 /**
29 * The doGet method of the servlet. <br>
30 *
31 * This method is called when a form has its tag value method equals to get.
32 *
33 * @param request the request send by the client to the server
34 * @param response the response send by the server to the client
35 * @throws ServletException if an error occurred
36 * @throws IOException if an error occurred
37 */
38 public void doGet(HttpServletRequest request, HttpServletResponse response)
39 throws ServletException, IOException {
40 request.setCharacterEncoding("gb2312");
41 response.setCharacterEncoding("gb2312");
42 String str=request.getParameter("q");
43
44 response.setContentType("text/html");
45 PrintWriter out = response.getWriter();
46 out.write("ada");
47 out.flush();
48 out.close();
49 }
50
51 /**
52 * The doPost method of the servlet. <br>
53 *
54 * This method is called when a form has its tag value method equals to post.
55 *
56 * @param request the request send by the client to the server
57 * @param response the response send by the server to the client
58 * @throws ServletException if an error occurred
59 * @throws IOException if an error occurred
60 */
61 public void doPost(HttpServletRequest request, HttpServletResponse response)
62 throws ServletException, IOException {
63
64 response.setContentType("text/html");
65 PrintWriter out = response.getWriter();
66 out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
67 out.println("<HTML>");
68 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
69 out.println(" <BODY>");
70 out.print(" This is ");
71 out.print(this.getClass());
72 out.println(", using the POST method");
73 out.println(" </BODY>");
74 out.println("</HTML>");
75 out.flush();
76 out.close();
77 }
78
79 /**
80 * Initialization of the servlet. <br>
81 *
82 * @throws ServletException if an error occurs
83 */
84 public void init() throws ServletException {
85 // Put your code here
86 }
87
88 }
