28 Ocak 2012 Cumartesi

Hashing with MD5 in JAVA

This guy has explained it very well.
http://www.mkyong.com/java/java-md5-hashing-example/

package com.mkyong.test;
 
import java.security.MessageDigest;
 
public class MD5HashingExample 
{
    public static void main(String[] args)throws Exception
    {
     String password = "123456";
 
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
 
        byte byteData[] = md.digest();
 
        //convert the byte to hex format method 1
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < byteData.length; i++) {
         sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
        }
 
        System.out.println("Digest(in hex format):: " + sb.toString());
 
        //convert the byte to hex format method 2
        StringBuffer hexString = new StringBuffer();
     for (int i=0;i<byteData.length;i++) {
      String hex=Integer.toHexString(0xff & byteData[i]);
          if(hex.length()==1) hexString.append('0');
          hexString.append(hex);
     }
     System.out.println("Digest(in hex format):: " + hexString.toString());
    }
}
Output
Digest(in hex format):: e10adc3949ba59abbe56e057f20f883e
Digest(in hex format):: e10adc3949ba59abbe56e057f20f883e

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