Java I/O - 如何将标准输出重定向到文件

import java.io.FileOutputStream;
import java.io.PrintStream;

public class Main {
  public static void main(String[] args) throws Exception {
    System.setOut(new PrintStream(new FileOutputStream("system_out.txt")));
    System.out.println("sent to the file system_out.txt");
  }
}