MD5进行加密操作

package com.dyy.test;

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

public class TestMD5 {

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

    public TestMD5() {
    }

    public static void main(String[] args) {
        TestMD5 testMD5 = new TestMD5();
         System.out.println(testMD5.GetMD5Code("22"));
    }

    public static String GetMD5Code(String strObje) {
         String st = new String(strObje);
         try {
            MessageDigest digest = MessageDigest.getInstance("MD5");

            st = byteToString(digest.digest(strObje.getBytes()));
        } catch (NoSuchAlgorithmException e) {
            System.out.println("加密时报错");
            e.printStackTrace();
        }
        return st;
    }

    //转换字节数组为16进制字符
    private static String byteToString(byte[] digest) {
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < digest.length; i++) {
            buffer.append(byteToArrayString(digest[i]));
        }
        return buffer.toString();
    }

    private static Object byteToArrayString(byte b) {
         int br = b;

         if(br <0) {
             br+=256;
         }
        int iD1 = br / 16;
        int iD2 = br % 16;
        return strDigits[iD1] + strDigits[iD2];

    }

}