js 16进制Unicode编码与中文相互转换 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <script language=javascript>

function utf8to16(str) {
    var out, i, len, c;
    var char2, char3;
    out = "";
    len = str.length;
    i = 0;
    while(i < len) {
		 c = str.charCodeAt(i++);
		 switch(c >> 4)
		 { 
		   case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
			 out += str.charAt(i-1);
			 break;
		   case 12: case 13:
			 char2 = str.charCodeAt(i++);
			 out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
			 break;
		   case 14:
			 char2 = str.charCodeAt(i++);
			 char3 = str.charCodeAt(i++);
			 out += String.fromCharCode(((c & 0x0F) << 12) |
				((char2 & 0x3F) << 6) |
				((char3 & 0x3F) << 0));
			 break;
		 }
    }

    return out;
}
 
document.writeln(utf8to16(unescape("%E4%BD%A0%E5%A5%BD")));
document.writeln("%E4%BD%A0%E5%A5%BD");
document.writeln(escape("你好"));
document.writeln(encodeURI("你好"));
document.writeln(encodeURIComponent("你好"));

</script>
 </HEAD>

 <BODY>
  
 </BODY>
</HTML>

posted @ 2015-05-24 11:31  172257861  阅读(1936)  评论(0)  编辑  收藏  举报