1.中文字符串转化为UTF-8编码，如“<汉字>”的UTF-8编码为“%3C%E6%B1%89%E5%AD%97%3E”
2.UTF-8编码字符串“%E6%B1%89%E5%AD%97”的中文为“<汉字>”
<script language="javascript" type="text/javascript">
//字符转换为UTF-8编码
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 value;
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 "";
}
var test = EncodeUtf8("中国");
alert("中国-----"+test);
</script>
<script language="JavaScript">
//字符串替换函数,全部替换
function strReplaceAll(str,oldStr,newStr){
var regS = new RegExp(oldStr,"gi");
newStr = str.replace(regS,newStr);
return newStr;
}
</script>
<script>
//UTF-8编码的汉字转换为字符，特殊字符未处理，
function chineseFromUtf8Url(strUtf8)
{
var bstr = "";
var nOffset = 0; // processing point on strUtf8
if( strUtf8 == "" )
return "";
strUtf8 = strUtf8.toLowerCase();
nOffset = strUtf8.indexOf("%e");
if( nOffset == -1 )
return strUtf8;
while( nOffset != -1 )
{
bstr += strUtf8.substr(0, nOffset);
strUtf8 = strUtf8.substr(nOffset, strUtf8.length - nOffset);
if( strUtf8 == "" || strUtf8.length < 9 ) // bad string
return bstr;
bstr += utf8CodeToChineseChar(strUtf8.substr(0, 9));
strUtf8 = strUtf8.substr(9, strUtf8.length - 9);
nOffset = strUtf8.indexOf("%e");
}
return bstr + strUtf8;
}
function unicodeFromUtf8(strUtf8)
{
var bstr = "";
var nTotalChars = strUtf8.length; // total chars to be processed.
var nOffset = 0; // processing point on strUtf8
var nRemainingBytes = nTotalChars; // how many bytes left to be converted
var nOutputPosition = 0;
var iCode, iCode1, iCode2; // the value of the unicode.
while (nOffset < nTotalChars)
{
iCode = strUtf8.charCodeAt(nOffset);
if ((iCode & 0x80) == 0) // 1 byte.
{
if ( nRemainingBytes < 1 ) // not enough data
break;
bstr += String.fromCharCode(iCode & 0x7F);
nOffset ++;
nRemainingBytes -= 1;
}
else if ((iCode & 0xE0) == 0xC0) // 2 bytes
{
iCode1 = strUtf8.charCodeAt(nOffset + 1);
if ( nRemainingBytes < 2 || // not enough data
(iCode1 & 0xC0) != 0x80 ) // invalid pattern
{
break;
}
bstr += String.fromCharCode(((iCode & 0x3F) << 6) | ( iCode1 & 0x3F));
nOffset += 2;
nRemainingBytes -= 2;
}
else if ((iCode & 0xF0) == 0xE0) // 3 bytes
{
iCode1 = strUtf8.charCodeAt(nOffset + 1);
iCode2 = strUtf8.charCodeAt(nOffset + 2);
if ( nRemainingBytes < 3 || // not enough data
(iCode1 & 0xC0) != 0x80 || // invalid pattern
(iCode2 & 0xC0) != 0x80 )
{
break;
}
bstr += String.fromCharCode(((iCode & 0x0F) << 12) |
((iCode1 & 0x3F) << 6) |
(iCode2 & 0x3F));
nOffset += 3;
nRemainingBytes -= 3;
}
else // 4 or more bytes -- unsupported
break;
}
if (nRemainingBytes != 0)
{
// bad UTF8 string.
return "";
}
return bstr;
}
function utf8CodeToChineseChar(strUtf8)
{
var iCode, iCode1, iCode2;
iCode = parseInt("0x" + strUtf8.substr(1, 2));
iCode1 = parseInt("0x" + strUtf8.substr(4, 2));
iCode2 = parseInt("0x" + strUtf8.substr(7, 2));
return String.fromCharCode(((iCode & 0x0F) << 12) |
((iCode1 & 0x3F) << 6) |
(iCode2 & 0x3F));
}
var test ="%3CHTML%3E %3CHEAD%3E %3CCENTER%3E %3CH1%3EEncountered an NDS error while updating the new password. %3CP%3EPlease contact the system administrator. %3C/H1%3E %3C/CENTER%3E %3C/HEAD%3E %3C/HTML%3E";
//替换掉中文字符串中的括号“<>”
test = strReplaceAll(test,"%3C","<");
test = strReplaceAll(test,"%3E",">");
alert(chineseFromUtf8Url("%3CHTML%3E %3CHEAD%3E %3CCENTER%3E %3CH1%3EEncountered an NDS error while updating the new password. %3CP%3EPlease contact the system administrator. %3C/H1%3E %3C/CENTER%3E %3C/HEAD%3E %3C/HTML%3E------"+test))
</script>
<script language="javascript">
//替换所有字符
function replace(str,a,b)
{
var i;
var s2 = str;
while(s2.indexOf(a)>0)
{
i = s2.indexOf(a);
s2 = s2.substring(0, i) + b
+ s2.substring(i + 2, s2.length);
}
return s2;
}
</script>