JSP+ajax实现百度首页自动补全功能实例代码
模仿百度首页的自动补全提示功能代码如下:
- <%@ 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 XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
- <html xmlns=“http://www.w3.org/1999/xhtml”>
- <head>
- <title>查找</title>
- <script type=“text/javascript”>
- function mSift_SeekTp(oObj, nDire) {
- var nPosition = null;
- if (oObj.getBoundingClientRect && !document.all) {
- var oDc = document.documentElement;
- switch (nDire) {
- case 0:
- return oObj.getBoundingClientRect().top + oDc.scrollTop;
- case 1:
- return oObj.getBoundingClientRect().right + oDc.scrollLeft;
- case 2:
- return oObj.getBoundingClientRect().bottom + oDc.scrollTop;
- case 3:
- return oObj.getBoundingClientRect().left + oDc.scrollLeft;
- }
- } else {
- if (nDire == 1 || nDire == 3) {
- nPosition = oObj.offsetLeft;
- } else {
- nPosition = oObj.offsetTop;
- }
- if (arguments[arguments.length – 1] != 0) {
- if (nDire == 1) {
- nPosition += oObj.offsetWidth;
- } else if (nDire == 2) {
- nPosition += oObj.offsetHeight;
- }
- }
- if (oObj.offsetParent != null) {
- nPosition += mSift_SeekTp(oObj.offsetParent, nDire, 0);
- }
- return nPosition;
- }
- }
- function mSift(cVarName, nMax) {
- this.oo = cVarName;
- this.Max = nMax;
- }
- mSift.prototype = {
- Varsion : ‘v2010.10.29 by AngusYoung | mrxcool.com’,
- Target : Object,
- TgList : Object,
- Listeners : null,
- SelIndex : 0,
- Data : [],
- ReData : [],
- Create : function(oObj) {
- var _this = this;
- var oUL = document.createElement(‘ul’);
- oUL.style.display = ‘none’;
- oObj.parentNode.insertBefore(oUL, oObj);
- _this.TgList = oUL;
- oObjoObj.onkeydown = oObj.onclick = function(e) {
- _this.Listen(this, e);
- };
- oObj.onblur = function() {
- setTimeout(function() {
- _this.Clear();
- }, 100);
- };
- },
- Complete : function() {
- },
- Select : function() {
- var _this = this;
- if (_this.ReData.length > 0) {
- _this_this.Target.value = _this.ReData[_this.SelIndex].replace(
- /*/g, ‘*’).replace(/|/g, ‘|’);
- _this.Clear();
- }
- setTimeout(function() {
- _this.Target.focus();
- }, 10);
- _this.Complete();
- },
- Listen : function(oObj) {
- var _this = this;
- _this.Target = oObj;
- var e = arguments[arguments.length – 1];
- var ev = window.event || e;
- switch (ev.keyCode) {
- case 9://TAB
- return;
- case 13://ENTER
- _this.Target.blur();
- _this.Select();
- return;
- case 38://UP
- _this_this.SelIndex = _this.SelIndex > 0 ? _this.SelIndex – 1
- : _this.ReData.length – 1;
- break;
- case 40://DOWN
- _this_this.SelIndex = _this.SelIndex < _this.ReData.length – 1 ? _this.SelIndex + 1
- : 0;
- break;
- default:
- _this.SelIndex = 0;
- }
- if (_this.Listeners) {
- clearInterval(_this.Listeners);
- }
- _this.Listeners = setInterval(function() {
- _this.Get();
- }, 10);
- },
- Get : function() {
- var _this = this;
- if (_this.Target.value == ”) {
- _this.Clear();
- return;
- }
- if (_this.Listeners) {
- clearInterval(_this.Listeners);
- }
- ;
- _this.ReData = [];
- var cResult = ”;
- for ( var i = 0; i < _this.Data.length; i++) {
- if (_this.Data[i].toLowerCase().indexOf(
- _this.Target.value.toLowerCase()) >= 0) {
- _this.ReData.push(_this.Data[i]);
- if (_this.ReData.length == _this.Max) {
- break;
- }
- }
- }
- var cRegPattern = _this.Target.value.replace(/*/g, ‘*’);
- cRegPatterncRegPattern = cRegPattern.replace(/|/g, ‘|’);
- cRegPatterncRegPattern = cRegPattern.replace(/+/g, ‘\+’);
- cRegPatterncRegPattern = cRegPattern.replace(/./g, ‘\.’);
- cRegPatterncRegPattern = cRegPattern.replace(/?/g, ‘\?’);
- cRegPatterncRegPattern = cRegPattern.replace(/^/g, ‘\^’);
- cRegPatterncRegPattern = cRegPattern.replace(/$/g, ‘\$’);
- cRegPatterncRegPattern = cRegPattern.replace(/(/g, ‘\(‘);
- cRegPatterncRegPattern = cRegPattern.replace(/)/g, ‘\)’);
- cRegPatterncRegPattern = cRegPattern.replace(/[/g, ‘\[‘);
- cRegPatterncRegPattern = cRegPattern.replace(/]/g, ‘\]’);
- cRegPatterncRegPattern = cRegPattern.replace(/\/g, ‘\\’);
- var cRegEx = new RegExp(cRegPattern, ‘i’);
- for ( var i = 0; i < _this.ReData.length; i++) {
- if (_this.Target.value.indexOf(‘*’) >= 0) {
- _this.ReData[i] = _this.ReData[i].replace(/*/g, ‘*’);
- }
- if (_this.Target.value.indexOf(‘|’) >= 0) {
- _this.ReData[i] = _this.ReData[i].replace(/|/g, ‘|’);
- }
- cResult += ‘<li style=“padding:0 5px;line-height:20px;cursor:default;” onmouseover=”‘
- + _this.oo
- + ‘.ChangeOn(this);’
- + _this.oo
- + ‘.SelIndex=’
- + i
- + ‘;” onmousedown=”‘
- + _this.oo
- + ‘.Select();”>‘
- + _this.ReData[i]
- .replace(
- cRegEx,
- function(s) {
- return ‘<span style=“background:#ff9;font-weight:bold;font-style:normal;color:#e60;”>‘
- + s + ‘</span>‘;
- });
- +’</li>‘;
- }
- if (cResult == ”) {
- _this.Clear();
- } else {
- _this.TgList.innerHTML = cResult;
- _this.TgList.style.cssText = ‘display:block;position:absolute;background:#fff;border:#090 solid 1px;margin:-1px 0 0;padding: 5px;list-style:none;font-size:12px;’;
- _this.TgList.style.top = mSift_SeekTp(_this.Target, 2) + ‘px’;
- _this.TgList.style.left = mSift_SeekTp(_this.Target, 3) + ‘px’;
- _this_this.TgList.style.width = _this.Target.offsetWidth – 12 + ‘px’;
- }
- var oLi = _this.TgList.getElementsByTagName(‘li’);
- if (oLi.length > 0) {
- oLi[_this.SelIndex].style.cssText = ‘background:#36c;padding:0 5px;line-height:20px;cursor:default;color:#fff;’;
- }
- },
- ChangeOn : function(oObj) {
- var oLi = this.TgList.getElementsByTagName(‘li’);
- for ( var i = 0; i < oLi.length; i++) {
- oLi[i].style.cssText = ‘padding:0 5px;line-height:20px;cursor:default;’;
- }
- oObj.style.cssText = ‘background:#36c;padding:0 5px;line-height:20px;cursor:default;color:#fff;’;
- },
- Clear : function() {
- var _this = this;
- if (_this.TgList) {
- _this.TgList.style.display = ‘none’;
- _this.ReData = [];
- _this.SelIndex = 0;
- }
- }
- }
- </script>
- </head>
- <body>
- <form name=“salefrm” method=“post” action=“result.jsp”>
- <input type=“text” onfocus=“loadXMLDoc(this.value)” name=“name” id=“abc” size=“40” />
- <input type=“submit” value=“搜索” />
- </form>
- <script type=“text/javascript”>
- //建立实例,第一个参数是实例对象的名称,第二个是最多显示的数量
- var oo = new mSift(‘oo’, 20);
- //获取数据
- function loadXMLDoc(str) {
- var xmlhttp;
- if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
- xmlhttp = new XMLHttpRequest();
- } else {// code for IE6, IE5
- xmlhttp = new ActiveXObject(“Microsoft.XMLHTTP”);
- }
- xmlhttp.onreadystatechange = function() {
- if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
- oo.Data = xmlhttp.responseText.split(“|”);
- }
- };
- xmlhttp.open(“GET”, “AjaxServlet?name=”+str, true);
- xmlhttp.send();
- }
- //指定文本框对象建立特效
- oo.Create(document.getElementById(‘abc’));
- </script>
- </body>
- </html>
- AjaxServlet.java
- 代码如下:
- public void doGet(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- response.setContentType(“text/xml; charset=utf-8″);
- PrintWriter out = response.getWriter();
- String str = newsDao.findAllNewsType();
- out.println(str);
- }
以上就是主要代码,数据库查询后返回的是以”|”分割连接的字符串组合
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磊宇堂 » JSP+ajax实现百度首页自动补全功能实例代码
2. 本站不保证所提供所有下载的资源的准确性、安全性和完整性,资源仅供下载学习之用!如有链接无法下载、失效或广告,请联系客服处理,有奖励!
3. 您必须在下载后的24个小时之内,从您的电脑中彻底删除上述内容资源!如用于商业或者非法用途,与本站无关,一切后果请用户自负!
4. 如果您也有好的资源或教程,您可以投稿发布,成功分享后有RB奖励和额外RMB收入!
磊宇堂正在使用的服务器 维护管理由磊宇云服务器提供支持
磊宇堂 » JSP+ajax实现百度首页自动补全功能实例代码