Generate MD5 message

Md5UtilTest.java

import org.apache.commons.codec.digest.DigestUtils;
import org.junit.Assert;
import org.junit.Test;

import javax.xml.bind.DatatypeConverter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5UtilTest{

    private String message = "Hello world";

    @Test
    public void testMd5WithApacheCommonsCodec() {
        Assert.assertEquals("3e25960a79dbc69b674cd4ec67a72c62",DigestUtils.md5Hex(message));
    }

    @Test
    public void testMd5WithSpringUtil() {
        Assert.assertEquals("3e25960a79dbc69b674cd4ec67a72c62",org.springframework.util.DigestUtils.md5DigestAsHex(message.getBytes()));
    }

    @Test
    public void testMd5WithJavaSecurity() throws NoSuchAlgorithmException {
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        messageDigest.update(message.getBytes());
        byte[] digest = messageDigest.digest();

        Assert.assertEquals("3E25960A79DBC69B674CD4EC67A72C62", DatatypeConverter.printHexBinary(digest));
    }

}