Android encryption Tool class

Importjava.security.MessageDigest;Importjava.security.NoSuchAlgorithmException;/*** Cryptographic Tool class * Created by Administrator on 2015/10/21 0021.*/ Public classEncryptutils {/*** String encryption using the MD5 algorithm*/     Public Final Staticstring encryptMD5 (string source) {if(Source = =NULL) {Source= ""; The String result= ""; Try{result= Encrypt (source, "MD5"); } Catch(NoSuchAlgorithmException ex) {//generally does not occur            Throw NewRuntimeException (ex); }        returnresult.tolowercase (); }    /*** String encryption using the SHA algorithm*/     Public Final Staticstring Encryptsha (string source) {if(Source = =NULL) {Source= ""; The String result= ""; Try{result= Encrypt (source, "SHA"); } Catch(NoSuchAlgorithmException ex) {//generally does not occur            Throw NewRuntimeException (ex); }        returnresult; }    /*** String Encryption*/    Private Final Staticstring Encrypt (string source, string algorithm)throwsnosuchalgorithmexception {byte[] Resbytearray =Encrypt (Source.getbytes (), algorithm); returntohexstring (Resbytearray); }    /*** byte array encryption*/    Private Final Static byte[] Encrypt (byte[] source, String algorithm)throwsnosuchalgorithmexception {messagedigest MD=messagedigest.getinstance (algorithm);        Md.reset ();        Md.update (source); returnmd.digest (); }    /*** Get hex string from byte array*/    Private Final StaticString tohexstring (byte[] res) {StringBuffer SB=NewStringBuffer (res.length << 1);  for(inti = 0; i < res.length; i++) {String digit= Integer.tohexstring (0xFF &Res[i]); if(digit.length () = = 1) {digit= ' 0 ' +Digit;        } sb.append (digit); }        returnsb.tostring (). toUpperCase (); }}

Android encryption Tool class