jQuery autocomplate 自扩展插件、自动完成示例代码

不过做了浏览器方面的兼容，经测试兼容IE6+、Firefox3.5+
首先看看autocomplate.js:
;(function ($) {
var index = -1;
var timeId;
var cssOptions = {
"border": "1px solid black",
"background-color": "white",
"position": "absolute"/*,
"font": "normal normal lighter 14px 6px Times New Roman"*/
};
var defaults = {
width: "auto",
highlightColor: "#3399FE",
unhighlightColor: "#FFFFFF",
css: cssOptions,
dataType: "xml",
paramName: "word",
delay: 500,
max: 20
};
var keys = {
UP: 38,
DOWN: 40,
DEL: 46,
TAB: 9,
ENTER: 13,
ESC: 27,
/*COMMA: 188,*/
PAGEUP: 33,
PAGEDOWN: 34,
BACKSPACE: 8,
A: 65,
Z: 90
};
$.fn.extend({
autocomplete: function (sUrl, settings) {
sUrl = (typeof sUrl === "string") ? sUrl : "";
var param = !this.attr("id") ? defaults.paramName : this.attr("id");
settings = $.extend({}, defaults, {url: sUrl, paramName: param}, settings);
var autoTip = this.autoTipTemplate(this, settings);
$("body").append(autoTip);
var $this = this;
this.keyup(function (event) {
$this.keyOperator(event, autoTip, settings);
});
/*$("input[type=button]").click(function () {
$("#result").text("文本框中的【" + search.val() + "】被提交了！");
$("#auto").hide();
index = - 1;
});*/
return this.each(function () {
$this.val();
});
},
autoTipTemplate: function (input, settings) {
var inputOffset = input.offset();
var autoTip = $("<div/>").css(settings.css).hide()
.css("top", inputOffset.top + input.height() + 5 + "px")
.css("left", inputOffset.left + "px");
var space = $.browser.mozilla ? 2 : 6;//兼容浏览器
var tipWidth = (typeof settings.width === "string" && "auto") ? input.width() : settings.width;
autoTip.width(tipWidth + space + "px");
return autoTip;
},
select: function (target, index, settings, flag) {
var color = flag ? settings.highlightColor : settings.unhighlightColor;
target.children("div").eq(index).css("background-color", color);
},
keyOperator: function (event, autoTip, settings) {
var evt = event || window.event;
var autoNodes = autoTip.children("div");
var kc = evt.keyCode;
var $this = this;
/* 当用户按下字母或是delete 或是退格键*/
if (kc >= keys.A && kc <= keys.Z || kc == keys.BACKSPACE || kc == keys.DEL) {
var wordText = this.val();
if (wordText.length != 0) {
var param = {};
param[settings.paramName] = wordText;
clearTimeout(timeId);
timeId = setTimeout(function () {
$.post(settings.url, param, function (data) {
var wordObj = $(data);
if (settings.dataType == "xml") {
var wordNodes = wordObj.find("word");
autoTip.html("");
wordNodes.each(function (i) {
var divNode = $("<div>").attr("id", i);
//将遍历的单词加入到创建的div中，然后把该div追加到auto中
divNode.html($(this).text()).appendTo(autoTip);
//鼠标已进去，添加高亮
divNode.mousemove(function () {
//如果已经存在高亮，去掉高亮改为白色
if (index != -1) {
autoTip.children("div").eq(index).css("background-color", settings.unhighlightColor);
}
index = $(this).attr("id");
$(this).css("background-color", settings.highlightColor);
});
//鼠标移出,取消高亮
divNode.mouseout(function () {
$(this).css("background-color", settings.unhighlightColor);
});
//点击高亮内容
divNode.click(function () {
$this.val($(this).text());
index = -1;
autoTip.hide();
});
});
if (wordNodes.length > 0) {
autoTip.show();
} else {
autoTip.hide();
index = -1;
}
}
});
}, settings.delay);
} else {
autoTip.hide();
index = -1;
}
} else if (kc == keys.UP || kc == keys.DOWN) {/*当用户按下上下键*/
if (kc == keys.UP) {//向上
if (index != -1) {
autoNodes.eq(index).css("background-color", settings.unhighlightColor);
index--;
} else {
index = autoNodes.length - 1;
}
if (index == -1) {
index = autoNodes.length - 1;
}
autoNodes.eq(index).css("background-color", settings.highlightColor);
} else {//向下
if (index != -1) {
autoNodes.eq(index).css("background-color", settings.unhighlightColor);
}
index++;
if (index == autoNodes.length) {
index = 0;
}
autoNodes.eq(index).css("background-color", settings.highlightColor);
}
} else if (kc == keys.PAGEUP || kc == keys.PAGEDOWN) {
event.preventDefault();
if (kc == keys.PAGEUP) {
if (index != -1) {
autoNodes.eq(index).css("background-color", settings.unhighlightColor);
}
if (autoNodes.length > 0) {
index = 0;
autoNodes.eq(0).css("background-color", settings.highlightColor);
}
} else {
if (index != -1) {
autoNodes.eq(index).css("background-color", settings.unhighlightColor);
}
index = autoNodes.length - 1;
autoNodes.eq(index).css("background-color", settings.highlightColor);
}
} else if (kc == keys.ENTER) {
//回车键
//有高亮内容就补全信息
if (index != -1) {
$this.val(autoNodes.eq(index).text());
} else {//没有就隐藏
$("body").append($("<div/>").text("文本框中的【" + $this.val() + "】被提交了！"));
$this.get(0).blur();
}
autoTip.hide();
index = -1;
} else if (kc == keys.ESC) {
autoTip.hide();
}
}
});
})(jQuery);

var defaults = {
width: "auto",//默认或自动设置宽度
highlightColor: "#3399FE",//高亮时的颜色
unhighlightColor: "#FFFFFF",//非高亮时的颜色
css: cssOptions,
dataType: "xml",//ajax请求返回数据类型
paramName: "word",//ajax请求的参数名称，如果你有设置文本域的id，那么就使用这个属性
delay: 500,//当文本域在不停的输入时，ajax多久请求一次服务器
};

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Ajax示例，实现Google搜索补全功能</title>
<meta http-equiv="author" content="hoojo">
<meta http-equiv="email" content="hoojo_@126.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="jslib/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="jslib/jquery.autocomplete-1.2.js"></script>
<script type="text/javascript">
$(function () {
$(":text").autocomplete("AutocomplataWordServlet", {dataType: "xml", width: "auto"});
});
</script>
</head>
<body>
请输入：<input type="text" />
<input type="button" value="Go" /><br/><br/>
</body>
</html>

$(":text").autocomplete("AutocomplataWordServlet", {
width: "auto",
highlightColor: "#3355FE",
unhighlightColor: "#FFFFcc",
css: {border: "2px solid red"},
dataType: "xml",
paramName: "keyWord",
delay: 300
});

package com.hoo.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("serial")
public class AutocomplataWordServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String word = request.getParameter("word");
request.setAttribute("word", word);
//System.out.println(word);
request.getRequestDispatcher("word.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

<%@ page language="java" contentType="text/xml; charset=UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<words>
<c:if test="${fn:startsWith('abstruct', word)}">
<word>abstruct</word>
</c:if>
<c:if test="${fn:startsWith('anilazine', word)}">
<word>anilazine</word>
</c:if>
<c:if test="${fn:startsWith('appeared', word)}">
<word>appeared</word>
</c:if>
<c:if test="${fn:startsWith('autocytolysis', word)}">
<word>autocytolysis</word>
</c:if>
<c:if test="${fn:startsWith('apple', word)}">
<word>apple</word>
</c:if>
<c:if test="${fn:startsWith('boolean', word)}">
<word>boolean</word>
</c:if>
<c:if test="${fn:startsWith('break', word)}">
<word>break</word>
</c:if>
<c:if test="${fn:startsWith('bird', word)}">
<word>bird</word>
</c:if>
<c:if test="${fn:startsWith('blur', word)}">
<word>blur</word>
</c:if>
<c:if test="${fn:startsWith('call', word)}">
<word>call</word>
</c:if>
<c:if test="${fn:startsWith('class', word)}">
<word>class</word>
</c:if>
<c:if test="${fn:startsWith('card', word)}">
<word>card</word>
</c:if>
<c:if test="${fn:startsWith('dacnomania', word)}">
<word>dacnomania</word>
</c:if>
<c:if test="${fn:startsWith('document', word)}">
<word>document</word>
</c:if>
</words>