java IO 指定输出文件的编码格式

import java.io.*;

public class Main {

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

//指定编码格式 utf-8
OutputStreamWriter osw=new OutputStreamWriter(new FileOutputStream("utf_8.txt"),"UTF-8");
osw.write("神奇的我");
osw.close();

//指定gbk编码格式
OutputStreamWriter osw2=new OutputStreamWriter(new FileOutputStream("gbk.txt"),"GBK");
osw2.write("神奇的我");
osw2.close();
}
}