php、asp.net关于后台设置的cookie前台JS获取时出现中文乱码问题解决

.NET:

在后台设置的中文cookie,可以先用HttpUtility.UrlEncode进行编码，在前台用JS获取cookie时用decodeURIComponent进行解码

PHP:

1. 详见 http://www.cnblogs.com/Byrd/archive/2011/06/23/2088358.html

这种设置在IE上用没有问题，但在Firefox下中文出现乱码，借鉴.net下的解决方法对字符串进行urlencode编码

2.

首先PHP在用urlencode编码时要转换成utf-8再编码，然后设置cookie

 <?php

    $str = "国家主席";
    $test = iconv("GB2312","UTF-8",$str);

    setrawcookie("username",escape($_GET["username"]));

?> JS函数

function URLdecode(str) {
    var ret = "";
    for(var i=0;i<str.length;i++) {
        var chr = str.charAt(i);
        if(chr == "+") {
            ret += " ";
        }else if(chr=="%") {
            var asc = str.substring(i+1,i+3);
            if(parseInt("0x"+asc)>0x7f) {
                ret += decodeURI("%"+ str.substring(i+1,i+9));
                i += 8;
            }else {
                ret += String.fromCharCode(parseInt("0x"+asc));
                i += 2;
            }
        }else {
            ret += chr;
        }
    }
    return ret;
}

js获取cookie：username = URLdecode(readCookie("username"));