MD5 String Hash - Java Security

Java examples for Security:MD5

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Description

MD5 String Hash

Demo Code


import java.math.BigDecimal;
import java.security.MessageDigest;
import org.apache.log4j.Logger;

public class Main{
    public static void main(String[] argv) throws Exception{
        String s = "java2s.com";
        System.out.println(MD5(s));
    }//from w  w w  .j a  v a2 s .  c  om
    
    public final static String MD5(String s) {
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
                '9', 'a', 'b', 'c', 'd', 'e', 'f' };
        try {
            byte[] strTemp = s.getBytes();
            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(strTemp);
            byte[] md = mdTemp.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }
}

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