fuint-framework/fuint-util/src/main/java/com/fuint/util/Md5Encryptor.java

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package com.fuint.util;

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

/**
 * MD5加密
 * 
 * @author fsq
 * @version $Id: Md5Encryptor.java
 */
public class Md5Encryptor {

    private static final String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"   };

    public static String encrypt(String originalStr) {
        String resultString = null;

        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = byteArrayToHexString(md.digest(originalStr.getBytes()));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return resultString;
    }

    /**
     * Transfer byte array to HEX string
     *
     * @param b
     *            byte array
     * @return HEX string
     */

    private static String byteArrayToHexString(byte[] b) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {
            resultSb.append(byteToHexString(b[i]));
        }
        return resultSb.toString();
    }

    /**
     * Transfer byte to HEX string
     *
     * @param b byte
     * @return HEX string
     */
    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n = 256 + n;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static void main(String[] args) {