fscommand("exec", "go.bat"); 
my_btn.onPress = function() { 
    System.useCodepage = true; 
    var my_l:LoadVars = new LoadVars(); 
    my_l.load("a.txt"); 
    my_l.onData = function(suc) { 
        var tmp:Array = new Array(); 
        var i:Number = suc.indexOf("个文件")-2; 
        for (var j = 0; ; j++) { 
            tmp[j] = suc.charAt(i-j); 
            if (suc.charAt(i-j-1) == " ") { 
                break; 
            } 
        } 
        tmp.reverse(); 
        i = Number(tmp.join("")); 
        my_txt.text = "该目录下共有文件"+i+"个"; 
    }; 
};

//-----go.bat---------- 
cd.. 
dir>a.txt 
//---------------------