MD5

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package com.utils;     import org.slf4j.Logger; import org.slf4j.LoggerFactory;   import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException;   public class MD5 {     private static Logger logger = LoggerFactory.getLogger(MD5.class);       private static char[] hexs = {             '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',             'a', 'b', 'c', 'd', 'e', 'f'     };       public static String encode(String source)     {         try {             char[] result;             MessageDigest digester = MessageDigest.getInstance("MD5");             byte[] sbs = source.getBytes("UTF8");             digester.update(sbs);             byte[] rbs = digester.digest();             int j = rbs.length;             result = new char[j * 2];             int k = 0;             for(int i = 0; i < j; i++)             {                 byte b = rbs[i];                 result[k++] = hexs[b >>> 4 & 15];                 result[k++] = hexs[b & 15];             }               return new String(result);         } catch (NoSuchAlgorithmException e) {             logger.error(e.getMessage(),e);         } catch (UnsupportedEncodingException e) {             logger.error(e.getMessage(), e);         }         return null;     }     }