Android Learning Note----Java string MD5 encryption

The code is as follows:

1 /**2 * MD5 One-way encryption, 32-bit, used to encrypt passwords, because plaintext passwords are not safe to transmit in the channel, and plaintext is not safe to be stored locally3      *4      * @paramStr5      * @return6      */7      Public Staticstring MD5 (String str) {8MessageDigest MD5 =NULL;9         Try {TenMD5 = messagedigest.getinstance ("MD5"); One}Catch(Exception e) { A e.printstacktrace (); -             return""; -         } the  -         Char[] Chararray =Str.tochararray (); -         byte[] ByteArray =New byte[chararray.length]; -  +          for(inti = 0; i < chararray.length; i++) { -Bytearray[i] = (byte) chararray[i]; +         } A         byte[] Md5bytes =md5.digest (byteArray); at  -StringBuffer Hexvalue =NewStringBuffer (); -          for(inti = 0; i < md5bytes.length; i++) { -             intval = ((int) Md5bytes[i]) & 0xFF; -             if(Val < 16) { -Hexvalue.append ("0"); in             } - Hexvalue.append (Integer.tohexstring (Val)); to         } +         returnhexvalue.tostring (); -}

Android Learning Note----Java string MD5 encryption