前端网页指定
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">调用ajax中设定
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded;charset=UTF-8");
服务器端
response.setCharacterEncoding("utf8");
别忘了把文件保存成UTF-8
OVER