package cn.kgw;

import java.io.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class WeChatImgRevert {
 public static void main(String[] args) {

 ExecutorService pool = Executors.newFixedThreadPool(10);

 Runnable r = () -> {
 String[] fileName = GetFileName.getFileName("D:/dat");

 int i = 0;
 for (String name : fileName) {

 try (InputStream reader = new FileInputStream("D:/dat/" + name)) {
  try (OutputStream writer = new FileOutputStream("D:/photo/" + name + ".jpg")) {
  byte[] bytes = new byte[1024];
  int b;
  while ((b = reader.read(bytes)) != -1) {//這里的in.read(bytes);就是把輸入流中的東西，寫入到內存中（buffer）。
//  System.out.println("b = " + b + " b ^ 241 = " + (b ^ 241));
  writer.write(b ^ 241);//241這個值是現算的，每個人電腦的值都不一致
  writer.flush();
  }
  }
  System.out.println(i++);
 } catch (Exception e) {
  e.printStackTrace();
 }
 }
 };
 pool.submit(r);
 pool.shutdown();
// System.out.println("--------------------------------");
//
// ArrayList<String> listFileName = new ArrayList<String>();
//
// GetFileName.getAllFileName("F:/dat", listFileName);
//
// for (String name : listFileName) {
// System.out.println(name);
// }

 }

}


class GetFileName {

 public static String[] getFileName(String path) {

 File file = new File(path);

 String[] fileName = file.list();

 return fileName;

 }

// public static void getAllFileName(String path, ArrayList<String> fileName) {
//
// File file = new File(path);
//
// File[] files = file.listFiles();
//
// String[] names = file.list();
//
// if (names != null)
//
// fileName.addAll(Arrays.asList(names));
//
// for (File a : files) {
//
// if (a.isDirectory()) {
//
// getAllFileName(a.getAbsolutePath(), fileName);
//
// }
// }
// }

}