MD5Utils

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import com.yundaex.common.crypto.WrappedNoSuchAlgorithmException;

public class MD5Utils {

    /**
     * md5加密方法
     * @param source     源字符串
     * @return             加密后的字符串
     * @throws NoSuchAlgorithmException
     */
    public static String md5(String source) {
        char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new WrappedNoSuchAlgorithmException(e.getMessage());
        }
        md.update(source.getBytes());
        byte[] tmp = md.digest();
        char[] str = new char[16 * 2];

        int k = 0;
        for (int i = 0; i < 16; i++) {
            byte byte0 = tmp[i];
            str[k++] = hexDigits[byte0 >>> 4 & 0xf];
            str[k++] = hexDigits[byte0 & 0xf];
        }
        return new String(str);
    }

}