JSP + ajax實現(xiàn)輸入框自動補全功能 實例代碼

%@ 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; 

            oObj.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.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.SelIndex = _this.SelIndex > 0 ? _this.SelIndex - 1 

                        : _this.ReData.length - 1; 

                break; 

            case 40://DOWN 

                _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, '*'); 

            cRegPattern = cRegPattern.replace(/\|/g, '|'); 

            cRegPattern = cRegPattern.replace(/\+/g, '\\+'); 

            cRegPattern = cRegPattern.replace(/\./g, '\\.'); 

            cRegPattern = cRegPattern.replace(/\?/g, '\\?'); 

            cRegPattern = cRegPattern.replace(/\^/g, '\\^'); 

            cRegPattern = cRegPattern.replace(/\$/g, '\\$'); 

            cRegPattern = cRegPattern.replace(/\(/g, '\\('); 

            cRegPattern = cRegPattern.replace(/\)/g, '\\)'); 

            cRegPattern = cRegPattern.replace(/\[/g, '\\['); 

            cRegPattern = cRegPattern.replace(/\]/g, '\\]'); 

            cRegPattern = 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.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"> 

  

    //建立實例，第一個參數(shù)是實例對象的名稱，第二個是最多顯示的數(shù)量 

    var oo = new mSift('oo', 20); 

    //獲取數(shù)據(jù) 

    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(); 

    } 

  

        //指定文本框對象建立特效 

        oo.Create(document.getElementById('abc')); 

    /script> 

/body> 

/html>

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); 

}