import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Writer;

public class Text {

	public static void main(String[] args) throws IOException {

		// 位元組流 
		
		String file="D://test.txt";
		String file2="D://test2.txt";

		InputStream in = new FileInputStream(new File(file));
		OutputStream out = new FileOutputStream(new File(file2));

		byte[] buffer = new byte[in.available()];
		while (in.read(buffer) > -1) {
			out.write(buffer);
		}

		in.close();
		out.close();

		
		// 字元流

		File fr = new File("D://test.txt");
		File fw = new File("D://ccc.txt");

		// File fww = new File(fw, "test.txt");
		// if(!fw.exists()){ //如果不存在要複製的檔案路勁
		// fw.mkdirs();//建立檔案路勁
		// }
		InputStreamReader rd = new InputStreamReader(new FileInputStream(fr),"GB2312");// 編碼轉碼
		Writer wt = new FileWriter(fw);

		char[] ch = new char[1];

		while (rd.read(ch) != -1) {
			int len = ch.length;
			wt.write(ch, 0, len);
		}
		rd.close();
		wt.close();

	}
}