MD5 encryption Base64 Conversion method based on Java language

Provides 16-bit and 32-bit methods based on MD5 encryption

1 Importjava.io.IOException;2 ImportJava.math.BigInteger;3 Importjava.security.MessageDigest;4 Importjava.security.NoSuchAlgorithmException;5 ImportSun.misc.BASE64Decoder;6 ImportSun.misc.BASE64Encoder;7 /**8 * <p> Title: Coding Tool Class </p>9 * <p> function: Encode and convert data </p>Ten * Zhao Li One  */ A  Public classEncodeutil - { -      Public Static voidMain (string[] args)throwsException the     { -System.out.println (Md5encrypt16 ("string required for MD5 encryption")); -     } -  +     /** - * MD5 Encryption 16-bit +      * @paramencryptstr to encrypt data A      * @returnreturns 16-bit encryption results at * Zhaoli -      */ -      Public Staticstring md5encrypt16 (string encryptstr) -     { -         returnMd5encrypt32 (ENCRYPTSTR). SUBSTRING (8, 24); -     } in  -     /** to * MD5 Encryption 32-bit +      * @paramencryptstr to encrypt data -      * @return32-bit encryption results the * Zhaoli *      */ $      Public Staticstring Md5encrypt32 (string encryptstr)Panax Notoginseng     { - messagedigest MD5; the         Try +         { AMD5 = messagedigest.getinstance ("MD5"); the             byte[] Md5bytes =md5.digest (Encryptstr.getbytes ()); +StringBuffer Hexvalue =NewStringBuffer (); -              for(inti = 0; i < md5bytes.length; i++) $             { $                 intval = (Md5bytes[i]) & 0xFF; -                 if(Val < 16) -                 { theHexvalue.append ("0"); -                 }Wuyi Hexvalue.append (Integer.tohexstring (Val)); the             } -             returnhexvalue.tostring (). toLowerCase (); Wu}Catch(Exception e) -         { About             Throw NewRuntimeException (e); $         } -     } -  -     /**  A * Combining Base64 for MD5 encryption +      * @parammsg to encrypt string the      * @returnget MD5 and switch to base64 -      * @throwsException $      */ the      Public StaticString Md5encryptbase64 (String msg)throwsException the     { the         returnmsg = =NULL?NULL: Base64Encode (MD5 (msg)); the     } -  in     /**  the * Convert byte[] to a variety of binary strings the      * @parambytes byte[] About      * @paramradix can be converted into a range, from Character.min_radix to Character.max_radix, out of range and into 10 binary the      * @returnconverted string the      */ the      Public StaticString Binary (byte[] Bytes,intRadix) +     { -         return NewBigInteger (1, bytes). toString (radix);//The 1 here represents a positive number. the     }Bayi  the     /**  the * Base encode -      * @parambytes to encode byte[] -      * @returnencoded Base Code the      */ the      Public StaticString Base64Encode (byte[] bytes) the     { the         return NewBase64encoder (). Encode (bytes); -     } the  the     /**  the * Base Decode94      * @paramBase64code Base code to decode the      * @returnDecoded byte[] the      * @throwsException the      */98      Public Static byte[] Base64decode (String base64code) About     { -         Try101         {102             returnBase64code = =NULL?NULL:NewBase64decoder (). Decodebuffer (Base64code);103}Catch(IOException e)104         { the             Throw NewRuntimeException ("Error content", e);106         }107     }108 109     /**  the * Get the MD5 value of byte[]111      * @parambytes byte[] the      * @returnMD5113      * @throwsException the      */ the      Public Static byte[] MD5 (byte[] bytes) the     {117 MessageDigest MD;118         Try119         { -MD = Messagedigest.getinstance ("MD5");121}Catch(nosuchalgorithmexception e)122         {123             Throw NewRuntimeException ("Error content", e);124         } the md.update (bytes);126         returnmd.digest ();127     } - 129     /**  the * Get string MD5 value131      * @parammsg the      * @returnMD5133      * @throwsException134      */135      Public Static byte[] MD5 (String msg)136     {137         returnmsg = =NULL?NULL: MD5 (Msg.getbytes ());138     }139}

MD5 encryption Base64 Conversion method based on Java language