java将System.out.println的输出导出到文件中

1 public static void saveStreamToFile(String savePath,String input){
2       try {
3             //savePath like c:/log.txt
4             System.setOut(new PrintStream(new FileOutputStream(savePath)));
5             System.out.println(input);
6       } catch (FileNotFoundException e) {
7             e.printStackTrace();
8      }
9 }