UTF8和Unicode相互转换的函数--BMWCN's Blog-深圳足迹

心情不是很好,就贴js部分吧

function UnicodeToUTF8(strInUni){
    if(null==strInUni)
        returnnull;
    var strUni=String(strInUni);
    var strUTF8=String();
    for(var i=0;i<strUni.length;i++){
        var wchr=strUni.charCodeAt(i);
        if(wchr<0x80){
            strUTF8+=strUni.charAt(i);
            }
        else if(wchr<0x800){
            var chr1=wchr&0xff;
            var chr2=(wchr>>8)&0xff;
            strUTF8+=String.fromCharCode(0xC0|(chr2<<2)|((chr1>>6)&0x3));
            strUTF8+=String.fromCharCode(0x80|(chr1&0x3F));
            }
        else{
            var chr1=wchr&0xff;
            var chr2=(wchr>>8)&0xff;
            strUTF8+=String.fromCharCode(0xE0|(chr2>>4));
            strUTF8+=String.fromCharCode(0x80|((chr2<<2)&0x3C)|((chr1>>6)&0x3));
            strUTF8+=String.fromCharCode(0x80|(chr1&0x3F));
            }
        }
    return strUTF8;
    }
function UTF8ToUnicode(strInUTF8){
    if (null==strInUTF8)
        return null;
    var strUTF8=String(strInUTF8);
    var strUni=String();
    for(var i=0;i<strUTF8.length;){
        var chr1=strUTF8.charCodeAt(i);
        var chr2=strUTF8.charCodeAt(i+1);
        var chr3=strUTF8.charCodeAt(i+2);
        if(chr1<0x80){
            strUni+=strUTF8.charAt(i);
            i++;
            }
        else if(0xC0==(chr1&0xE0)){
            if(0x80!=(chr2&0xC0))
                return null;
            strUni+=String.fromCharCode(((chr1&0x1F)<<6)|(chr2&0x3F));
            i+=2;
            }
        else if(0xE0==(chr1&0xF0)){
            if(0x80!=(chr2&0xC0)||0x80!=(chr3&0xC0))
                return null;
            strUni+=String.fromCharCode(((chr1&0x0F)<<12)|((chr2&0x3F)<<6)|(chr3&0x3F));
            i+=3;
            }
        else{
            return null;
            }
        }
    return strUni;
    }

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深圳足迹 - - ［2008年全新改版。。。PJ2转换至Zblog，谢谢关注。］

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