乱码问题.

package MONA.demo06_编码;


import java.io.FileInputStream;
import java.io.FileOutputStream;


public class Dem01 {
    public static void main(String[] args) throws Exception {
        //写中文到文件中
        FileOutputStream fos = new FileOutputStream("5.txt");
        //使用UTF-8编码解析“你好”
        fos.write("你好".getBytes("gbk"));
        fos.close();
        System.out.println("程序结束");

        FileInputStream fis = new FileInputStream("5.txt");
        byte[] bytes = new byte[6];
        fis.read(bytes);
        //默认的编码是utf-8
        String s = new String(bytes,"gbk");
        System.out.println("读取到的内容:"+s);
    }
}