MD5加密 解密

package com.hnf.framework.orders.utils;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;


/**
 * des加密解密
 *
 * @author
 *
 */
public class DesEncrypt {
    String sl = "j+K2WUDWUoZ9pX+gEKqrsg==";//用MD5生成
    Key key;

    public DesEncrypt(String str) {
        setKey(str);// 生成密匙
    }

    /**利用MD5进行加密
     * @param str  待加密的字符串
     * @return  加密后的字符串
     * @throws NoSuchAlgorithmException  没有这种产生消息摘要的算法
     * @throws UnsupportedEncodingException
     */
    public static String EncoderByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException{
        //确定计算方法
        MessageDigest md5=MessageDigest.getInstance("MD5");
        BASE64Encoder base64en = new BASE64Encoder();
        //加密后的字符串
        String newstr=base64en.encode(md5.digest(str.getBytes("utf-8")));
        return newstr;
    }

    public DesEncrypt() {
         setKey(sl);
    }

    /**
     * 根据参数生成KEY
     */
    public void setKey(String strKey) {
        try {
            //对比DES
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
            this.key  = keyFactory.generateSecret(new DESedeKeySpec(strKey.getBytes("UTF8")));
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        }
    }


    /**
     * 加密String明文输入,String密文输出
     */
    public String encrypt(String strMing) {
        byte[] byteMi = null;
        byte[] byteMing = null;
        String strMi = "";
        BASE64Encoder base64en = new BASE64Encoder();
        try {
            byteMing = strMing.getBytes("UTF8");
            byteMi = this.getEncCode(byteMing);
            strMi = base64en.encode(byteMi);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            base64en = null;
            byteMing = null;
            byteMi = null;
        }
        return strMi;
    }

    /**
     * 解密 以String密文输入,String明文输出
     *
     * @param strMi
     * @return
     */
    public String decrypt(String strMi) {
        BASE64Decoder base64De = new BASE64Decoder();
        byte[] byteMing = null;
        byte[] byteMi = null;
        String strMing = "";
        try {
            byteMi = base64De.decodeBuffer(strMi);
            byteMing = this.getDesCode(byteMi);
            strMing = new String(byteMing, "UTF8");
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            base64De = null;
            byteMing = null;
            byteMi = null;
        }
        return strMing;
    }

    /**
     * 加密以byte[]明文输入,byte[]密文输出
     *
     * @param byteS
     * @return
     */
    private byte[] getEncCode(byte[] byteS) {
        byte[] byteFina = null;
        Cipher cipher;
        try {//对比DES
            cipher = Cipher.getInstance("DESede");
            cipher.init(Cipher.ENCRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    /**
     * 解密以byte[]密文输入,以byte[]明文输出
     *
     * @param byteD
     * @return
     */
    private byte[] getDesCode(byte[] byteD) {
        Cipher cipher;
        byte[] byteFina = null;
        try {//对比DES
            cipher = Cipher.getInstance("DESede");
            cipher.init(Cipher.DECRYPT_MODE, key,SecureRandom.getInstance("SHA1PRNG"));
            byteFina = cipher.doFinal(byteD);
        } catch (Exception e) {
            throw new RuntimeException(
                    "Error initializing SqlMap class. Cause: " + e);
        } finally {
            cipher = null;
        }
        return byteFina;
    }



    public static void main(String args[]) throws NoSuchAlgorithmException, UnsupportedEncodingException  {
       DesEncrypt des = new DesEncrypt();

       // String str1 = "[{\"instDate\":\"20170801\",\"sysSeqNum\":\"123456789\",\"termSsn\":\"123456654\",\"pan\":\"201010102121212121\",\"amtTrans\":\"20017.11\",\"retrivlRef\":\"1235\",\"cardAccpTermId\":\"abcd12345\",\"cardAccpId\":\"1234554321\",\"cardAccpName\":\"商户名称\",\"sysClrDate\":\"21070909\",\"respCode\":\"1\",\"switchData\":\"ok\",\"transCode\":\"支付方式\",\"txnNum\":\"交易类型\",\"orderNo\":\"123456\",\"cupSwresved\":\"订单号\",\"cupSwresved1\":\"微信支付宝交易号\"}]";
       String str1="121212" ;
       String str2 = des.encrypt(str1);
        DesEncrypt des1 = new DesEncrypt();
        System.out.println("密文:" + str2);

        String ii = "0Yddpv0j1IITqxBWGZnQe07heUWrn4hRnvpq5cXok7BOd48RfShBcXacGfzeSHrkxlH2fNocL19q" +
                "WBE04l6D8OMgQ5RbgNe+3GNBYjA6JbheJyeFxdEwtroScsSbKOKYalObEyH1Wb+a7YcVf6EZsPcW" +
                "YCev3/R/Uo0Ygbqfjc5TPPVBlcHfV1MEqPrT1bhkYXALOIsQjthNppO+n4HzCsDaQQRj2KVuci8O" +
                "tAzNJ+AbIL3y9mKlAtngBXG/kg2SAf1tLBQ4p9lQk1zYuAZzbJCbpTKVeW3mGaxWQBSSHV/oACMW" +
                "dDidSAc9Tbmew5Ed5kSYAWWL91L5C9thTRcieZ61ukYuFeMecPqbLk81HAo4UWImL54zXma4KvG4" +
                "0bYWk1IXTESDeKs3k0rs+7dCYDn0LZemPdY2syoFFLiRQ4U3df5CrxuKXmeNfURpcezfShLjy2Iv" +
                "rm735Dt54f2AT810jpFJrXH4BrP+sUaMS/Ego1DtfmYz3ayTOsdPhBaBpERhZF9kcmtS1vEDf2qL" +
                "miXxn4mZZke3JPy6oYSREO7VURhqc1fa+bmtYU8f4+dw5LgAmwAGI6OIJ5OeeheTZLtEjh/aQcSL" +
                "owz+8A4DanMFSB4sB28sGqUx3R9nsfdKOnju2Kmni+N9mPnQs9yYdbAeiHV6uLgswNpBBGPYpW6B" +
                "UqZ8PNIFqiOTcsd1scVpP3b55fMxMR7vLzhyi69jtizaOR3iyTA0tK6JXi2K2abAKsM3tC3VeTBu" +
                "3kJV73hWe87s+e03TzJnXRThxc37zDi8SboODWdKF1D7omh1H5+o6ZICIftuohfrV3ttVQBPvRiH" +
                "Wn6W82k94/ULnbCCvJRCyy+GZS6pYuZiUu/rzen8Hmsih3AY2Uz8TsYpS362F2K87mBH7FNT6Bjx" +
                "xj+HHUNmc2s83eDmBU4Fz6vTwr1PazjLnDAtNXTZqedhk3DMozUgA5rz7KwJ3wj3DyYGAzJe9i56" +
                "0QYwjIxRVrrUq2E1NY2guYZhbkj/yu5ZF7c9kAwzXAM5k6rKSoOsjoNBiyyTLZWxXGKFtHEG2hnW" +
                "38I=";
    // DES解密
    String deStr =
        des1.decrypt(ii);
        System.out.println("明文:" + deStr);
        //System.out.println(EncoderByMd5("instDatesysSeqNumtermSsnpanamtTransretrivlRefcardAccpTermIdcardAccpIdcardAccpNamesysClrDaterespCodeswitchDatatransCodetxnNumorderNocupSwresvedcupSwresved1Mym"));

    }

}