获得系统的编码

package code.cn;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

/*
 * 获得系统的编码
 */
public class CodeDemo {
    public static void main(String[] args) throws Exception {
        System.out.println("系统的默认编码为："+System.getProperty("file.encoding"));
        //转换编码
        File f = new File("d:"+File.separator+"c.txt");
        OutputStream out  = new FileOutputStream(f);
        String str = "中国，你好！";
        //byte [] b = str.getBytes("ISO8859-1");
        byte [] b = str.getBytes("GBK");
        out.write(b); 
        out.close();
    }
}