Android Open Source - PicSync M D5 Utils

From Project

Back to project page PicSync.

License

The source code is released under:

Apache License

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Java Source Code

package com.darrenmowat.gdcu.utils;
/*ww w. ja  v a2s.c  o  m*/
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {

  public static String getFileMd5(java.io.File file) throws NoSuchAlgorithmException, IOException {
    byte[] md5_buffer = new byte[32768];
    MessageDigest digest = MessageDigest.getInstance("MD5");
    InputStream fis = new FileInputStream(file);
    BufferedInputStream bf = new BufferedInputStream(fis);
    int len = 0;
    int n = 0;
    while (n != -1) {
      n = bf.read(md5_buffer);
      if (n > 0) {
        len = len + n;
        digest.update(md5_buffer, 0, n);
      }
    }
    byte[] digestResult = digest.digest();
    bf.close();
    fis.close();
    return HexConversions.bytesToHex(digestResult).toLowerCase();
  }

  public static String getMd5String(String in) {
    MessageDigest digest;
    try {
      digest = MessageDigest.getInstance("MD5");
      digest.reset();
      digest.update(in.getBytes());
      byte[] a = digest.digest();
      int len = a.length;
      StringBuilder sb = new StringBuilder(len << 1);
      for (int i = 0; i < len; i++) {
        sb.append(Character.forDigit((a[i] & 0xf0) >> 4, 16));
        sb.append(Character.forDigit(a[i] & 0x0f, 16));
      }
      return sb.toString();
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    }
    return null;
  }
}

Java Source Code List