Java MD5 hexdigest 샘플 코드.

import java.security.MessageDigest;
import java.math.BigInteger;

class Md5Utils {
   private String message;
   public Md5Utils( String message ) {
       this.message = message;
   }
   public String hexdigest() throws Exception {
       String hd;
       MessageDigest md5 = MessageDigest.getInstance( "MD5" );
       md5.update( this.message.getBytes() );
       BigInteger hash = new BigInteger( 1, md5.digest() );
       hd = hash.toString(16); // BigInteger strips leading 0's
       while ( hd.length() < 32 ) { hd = "0" + hd; } // pad with leading 0's
       return hd;
   }
   public static void main( String[] args ) throws Exception {
       for ( String message: args ) {
           System.out.println( new MD5( message ).hexdigest() );
       }
   }
}