UTF8 字节统计 

 1 function length4UTF8String(s) {
 2     var total = 0;
 3     var charCode = null;
 4     for (var i = 0, len = s.length; i < len; i++) {
 5         charCode = s.charCodeAt(i);
 6         if (charCode <= 0x007f) {
 7             total += 1;
 8         } else if (charCode <= 0x07ff) {
 9             total += 2;
10         } else if (charCode <= 0xffff) {
11             total += 3;
12         } else {
13             total += 4;
14         }
15     }
16     return total;
17 }

 

posted @ 2020-06-11 11:20  xlsdg  阅读(128)  评论(0)    收藏  举报