把asc码的汉字转为utf-8和iso8859-1

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class TestCharset {

	public static void main(String[] args) throws IOException {
		try {
			new TestCharset().execute();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private void execute() throws IOException {
		File f=new File("c:\\t2.txt");
		BufferedReader br=new BufferedReader(new FileReader(f));

		String s=br.readLine();
		while(s!=null){


		byte[] bytesISO8859 = null;
		byte[] bytesGBK = null;
		try {
//			bytesISO8859 = s.getBytes("iso-8859-1");
			bytesGBK = s.getBytes("UTF-8");
		} catch (java.io.UnsupportedEncodingException e) {
			e.printStackTrace();
		}
//		System.out.println("--------------       \n 8859 bytes:");
//		System.out.println("bytes is:     " + arrayToString(bytesISO8859));
//		System.out.println("hex format is:" + encodeHex(bytesISO8859));
//		System.out.println();
//		System.out.println("--------------        \n UTF-8 bytes:");
//		System.out.println("bytes is:         " + arrayToString(bytesGBK));
//		System.out.println("hex format         is:" + encodeHex(bytesGBK));
		System.out.println(encodeHex(bytesGBK));
		s=br.readLine();
		}

	}

	public static final String encodeHex(byte[] bytes) {
		StringBuffer buff = new StringBuffer(bytes.length * 2);
		String b;
		for (int i = 0; i < bytes.length; i++) {
			b = Integer.toHexString(bytes[i]);
			// byte是两个字节的，
			// 而上面的Integer.toHexString会把字节扩展为4个字节
			buff.append("%");
			buff.append(b.length() > 2 ? b.substring(6, 8) : b);

		}
		return buff.toString();
	}

	public static final String arrayToString(byte[] bytes) {
		StringBuffer buff = new StringBuffer();
		for (int i = 0; i < bytes.length; i++) {
			buff.append(bytes[i] + " ");
		}
		return buff.toString();
	}
}

运行一下就明白了..