Java export CSV file using Excel to open garbled problem

Write a CSV file, found that using notpad++ Open is no problem, but the use of Excel opened after the display garbled

The first code is this:

Bytearrayoutputstream OS = new Bytearrayoutputstream ();
PrintWriter printwriter = new PrintWriter (OS);
Printwriter.write ("\" brand quotient \ ", \" Division account balance (unit) \ ", \" business unit \ "\ n");

After discovering a problem, add printwriter.write (new byte[] {(byte) 0xEF, (Byte) 0xBB, (byte) 0xBF}); Just fine.

Bytearrayoutputstream OS = new Bytearrayoutputstream ();
PrintWriter printwriter = new PrintWriter (OS);
Printwriter.write (New byte[] {(byte) 0xEF, (Byte) 0xBB, (byte) 0xBF});
Printwriter.write ("\" brand quotient \ ", \" Division account balance (unit) \ ", \" business unit \ "\ n");

Java export CSV file using Excel to open garbled problem