utf-8.js

基于struts的网上商店源码

function EncodeUtf8(s1) {
    var s = escape(s1);
    var sa = s.split("%");
    var retV = "";
    if (sa[0] != "") {
        retV = sa[0];
    }
    for (var i = 1; i < sa.length; i++) {
        if (sa[i].substring(0, 1) == "u") {
            retV += Hex2Utf8(Str2Hex(sa[i].substring(1, 5)));

        } else
            retV += "%" + sa[i];
    }
    return retV;
}
function Str2Hex(s) {
    var c = "";
    var n;
    var ss = "0123456789ABCDEF";
    var digS = "";
    for (var i = 0; i < s.length; i++) {
        c = s.charAt(i);
        n = ss.indexOf(c);
        digS += Dec2Dig(eval(n));

    }
    return digS;
}
function Dec2Dig(n1) {
    var s = "";
    var n2 = 0;
    for (var i = 0; i < 4; i++) {
        n2 = Math.pow(2, 3 - i);
        if (n1 >= n2) {
            s += '1';
            n1 = n1 - n2;
        } else
            s += '0';

    }
    return s;
}
function Dig2Dec(s) {
    var retV = 0;
    if (s.length == 4) {
        for (var i = 0; i < 4; i++) {
            retV += eval(s.charAt(i)) * Math.pow(2, 3 - i);
        }
        return retV;
    }
    return -1;
}
function Hex2Utf8(s) {
    var retS = "";
    var tempS = "";
    var ss = "";
    if (s.length == 16) {
        tempS = "1110" + s.substring(0, 4);
        tempS += "10" + s.substring(4, 10);
        tempS += "10" + s.substring(10, 16);
        var sss = "0123456789ABCDEF";
        for (var i = 0; i < 3; i++) {
            retS += "%";
            ss = tempS.substring(i * 8, (eval(i) + 1) * 8);

            retS += sss.charAt(Dig2Dec(ss.substring(0, 4)));
            retS += sss.charAt(Dig2Dec(ss.substring(4, 8)));
        }
        return retS;
    }
    return "";
}

function revertUTF8(szInput) {
    var x, wch, wch1, wch2, uch = "", szRet = "";
    for (x = 0; x < szInput.length; x++) {
        if (szInput.charAt(x) == "%") {
            wch = parseInt(szInput.charAt(++x) + szInput.charAt(++x), 16);
            if (!wch) {
                break;
            }
            if (!(wch & 0x80)) {
                wch = wch;
            } else if (!(wch & 0x20)) {
                x++;
                wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x), 16);
                wch = (wch & 0x1F) << 6;
                wch1 = wch1 & 0x3F;
                wch = wch + wch1;
            } else {
                x++;
                wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x), 16);
                x++;
                wch2 = parseInt(szInput.charAt(++x) + szInput.charAt(++x), 16);
                wch = (wch & 0x0F) << 12;
                wch1 = (wch1 & 0x3F) << 6;
                wch2 = (wch2 & 0x3F);
                wch = wch + wch1 + wch2;
            }
            szRet += String.fromCharCode(wch);
        } else {
            szRet += szInput.charAt(x);
        }
    }
    return (szRet);
}