AJAX传递中文字符串时必须把中文字符串编码成unicode,一般会用到JS的自带函数escape().不过找到了更好的函数来确决中文字符转换成unicode编码的函数

function uniencode(text)   {       text = escape(text.toString()).replace(/\+/g, "%2B");       var matches = text.match(/(%([0-9A-F]{2}))/gi);       if (matches)       {           for (var matchid = 0; matchid < matches.length; matchid++)           {               var code = matches[matchid].substring(1,3);               if (parseInt(code, 16) >= 128)               {                   text = text.replace(matches[matchid], '%u00' + code);               }           }       }       text = text.replace('%25', '%u0025');           return text;   } 当然服务器端要对编码过的字符串进行第二次转码.把字符串转换成UTF-8编码.

function convert_int_to_utf8($intval)   {       $intvalintval = intval($intval);       switch ($intval)       {           // 1 byte, 7 bits           case 0:               return chr(0);           case ($intval & 0x7F):               return chr($intval);               // 2 bytes, 11 bits           case ($intval & 0x7FF):               return chr(0xC0 | (($intval >> 6) & 0x1F)) .                   chr(0x80 | ($intval & 0x3F));               // 3 bytes, 16 bits           case ($intval & 0xFFFF):               return chr(0xE0 | (($intval >> 12) & 0x0F)) .                   chr(0x80 | (($intval >> 6) & 0x3F)) .                   chr (0x80 | ($intval & 0x3F));               // 4 bytes, 21 bits           case ($intval & 0x1FFFFF):               return chr(0xF0 | ($intval >> 18)) .                   chr(0x80 | (($intval >> 12) & 0x3F)) .                   chr(0x80 | (($intval >> 6) & 0x3F)) .                   chr(0x80 | ($intval & 0x3F));       }   } 这样中文字符串就可以转换成UTF-8编码.这种方法适合各种服务器环境..