var Sample_String: String = "username@gmail.com|3.705|18|0.90"

var VALUE1: String = Sample_String.split("|")[0];
var VALUE2: String = Sample_String.split("|")[1];
var VALUE3: String = Sample_String.split("|")[2];
var VALUE4: String = Sample_String.split("|")[3];

trace(VALUE1);
trace(VALUE2);
trace(VALUE3);
trace(VALUE4);

//输出：

username@gmail.com
3.705
18
0.90

您可以使用split函数一次来创建拆分String的Array，如下所示：

private var myString:String = "username@gmail.com|3.705|18|0.90";

var splitStringArray: Array = myString.split("|");
for each (var splitString:String in splitStringArray)
{
    trace(splitString);
}