FileReader fre = new FileReader("E:\\TEST\\readText.txt");

FileWriter fwi = new FileWriter("E:\\TEST\\readText2.txt");  

BufferedReader bufr = new BufferedReader(fre );

BufferedWriter bufw = new BufferedWriter(fwi );  

String line = null;

while((line = bufr.readLine()) != null){

    bufw.write(line);

    bufw.newLine();

    bufw.flush();

}

bufr.close();

bufw.close();

File fileIn= new File("E:\\TEST\\readText.txt");

File fileOut= new File("E:\\TEST\\readText2.txt");

InputStreamReader inStream = new InputStreamReader(new FileInputStream(fileIn), "GBK");

OutputStreamWriter writerStream = new OutputStreamWriter(new FileOutputStream(fileOut),"GBK");

BufferedReader reader = new BufferedReader(inStream);

BufferedWriter writer = new BufferedWriter(writerStream);

String lineWriter = null;

while ((lineWriter = reader.readLine()) != null) {

    writer.write(lineWriter);

    writer.newLine();

    writer.flush();

}

reader.close();

writer.close();