Convert files in any unicode encoding type to UTF-8 in Java

I have this upload mechanism in our web app and everything is OK if the user just uploads a simple file and this is how part of the code looks:


// raw file
FormFile myFile = myForm.getTheFile();//using struts..so this is defined somewhere in my form bean

// final product should be BufferedReader
BufferedReader read = new BufferedReader(new InputStreamReader(myFile.getInputStream()));


My question is how do you convert files regardless of encoding type to UTF-8? Here are some of the list of extension names that I have to convert (yes i also have to handle big and lil endians):

utxt
utf8
utf-8  
utf16  
utf-16  
utf-16le  
utf-16be  
ucs2 ucs-2
ucs-2le
ucs-2be
cs2le


Now somewhere, I have seen this code (see below) but this just converts a text file to UTF-8:

String asString = new String(contents, "ISO8859_1");//for text file
byte[] newBytes = asString.getBytes("UTF8");


And I have seen this from the java site:

http://java.sun.com/j2se/1.3/docs/guide/intl/encoding.doc.html


Based on the info in that URL does that mean I just have to change "ISO8859_1" to "UnicodeBig" or "UTF-16" etc depending on what type my raw file is?
Like:

//if Sixteen-bit Unicode Transformation Format, little-endian byte order, with byte-order mark
String asString = new String(contents, "UnicodeLittle");
byte[] newBytes = asString.getBytes("UTF8");


If that is all I have to do how do I cast the byte[] newBytes to BufferedReader? Because BufferedReader should be my final product after converting the files to UTF-8


Thanks in advance!