改变输出流流向示例(printStream)

import java.io.*;

/**
 * @auto dh
 * @create 2020-04-24-16:24
 */
public class File005 {
    public static void main(String[] args) {
        BufferedOutputStream br = null;
        try {
            br = new BufferedOutputStream(new FileOutputStream("D:" + File.separator + "abc.txt"));
            PrintStream ps = new PrintStream(br, true);
//改变输出流的流向
            if (ps != null) {
                System.setOut(ps);
            }
            for(int i=0;i<=255;i++){
                System.out.print(i+" ");
                if(i>0 &&i%50==0){
                    System.out.println();
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }finally {
            if(br!=null){
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}