java将System.out.println的输出导出到文件中

直接看代码

public static void saveStreamToFile(String savePath,String input){
      try {
            //savePath like c:/log.txt
            System.setOut(new PrintStream(new FileOutputStream(savePath)));
            System.out.println(input);
      } catch (FileNotFoundException e) {
            e.printStackTrace();
     }
}