wechat-data-decode/java/src/me/yoqi/wechatdecode/WeChatImgRevert.java

package me.yoqi.wechatdecode;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class WeChatImgRevert {
	static String rootPath = "C:/Users/liuyuqi/AppData/Local/Packages/TencentWeChatLimited.forWindows10_sdtnhv12zgd7a/LocalCache/Roaming/Tencent/WeChatAppStore/WeChatAppStore Files/ab3255/Data/";

	public static void main(String[] args) {
		ExecutorService pool = Executors.newFixedThreadPool(10);
		Runnable r = () -> {
			String[] fileName = GetFileName.getFileName(rootPath);

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

				try (InputStream reader = new FileInputStream(rootPath + name)) {
					try (OutputStream writer = new FileOutputStream("D:/photo/" + name + ".jpg")) {
						byte[] bytes = new byte[1024];
						int b;
						while ((b = reader.read(bytes)) != -1) {// 这里的in.read(bytes);就是把输入流中的东西，写入到内存中（buffer）。
							// System.out.println("b = " + b + " b ^ 241 = " +
							// (b ^ 241));
							writer.write(b ^ 56611);// 241这个值是现算的，每个人电脑的值都不一致
							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);
			}
		}
	}

}