jsp中施用Jquery autocomplete plugin 读取远程数据，实现信息智能提示 _JavaScript

jsp中使用Jquery autocomplete plugin 读取远程数据，实现信息智能提示 .

1. 做一个前台显示文件，代码如下：

HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="jquery/jquery-1.3.2.js"></script>
<script src="jquery/jquery.autocomplete.js"></script>
<link href="jquery/jquery.autocomplete.css" rel="stylesheet" type="text/css">
<script>
$(document).ready(function(){
$('#book_name').autocomplete("search",{
minChars: 0,
max: 20,
autoFill: true,
mustMatch: true,
matchContains: true, //true 则显示包含关键字的词
scrollHeight: 220,
formatItem: function(data, i, total) {
return "<I>"+data[0]+"</I>";
},
formatMatch: function(data, i, total) {
return data[0];
},
formatResult: function(data) {
return data[0];
}
});
});
</script>
</head>
<body>
<div align="center" class="search_div">
<form action="piao_search.jsp" method="post" class="search_div">
<table align="center" width="450"><tr><td>票务名称：</td><td><input type="text" name="book_name" id="book_name" style="width:230px" title="请输入票务的名称"/></td>
<td><input type="image" src="images/search_button.gif"/></td></tr></table> </form>
</div>
</body>
</html>

在这个前台显示文件中，读取的后台数据是来自servlet的，这个servlet的url path 为"/search"。

下面给出后台servlet的代码：

Java代码

package servlets;
import actionforms.Piao;
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;
import actions.PiaoUtil;
import java.util.List;
import java.util.Iterator;
/**
*
* @author Administrator
*/
public class Search extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
PiaoUtil putil=new PiaoUtil();
List piaos=null;
try {
String q=request.getParameter("q");// 参数名q是提交查询关键字的。
piaos=putil.getAllShangjiaPiaoByName(q);
if(piaos!=null){
Iterator iter=piaos.iterator();
while(iter.hasNext()){
Piao p=(Piao)iter.next();
out.println(p.getPiaoTitle());
}
}
}catch(Exception ex){
}
finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet 方法。单击左侧的 + 号以编辑代码。">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*/
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}