MD5 加密 参数加密解密

MD5 加密     参数加密解密

import java.nio.charset.Charset;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Calendar;public class Md5Utils {public static void main(String[] args) {// 请求参数加密String verifyCode = "transType=C000&custId=custId";String queryString = "transType=C000&custId=custId" + "&verifyCode="+ getVerifyCode(MD5_SEED, verifyCode);System.out.println(queryString);// 返回参数加解密String enc = encode(verifyCode);String dec = decode(enc);System.out.println(enc);System.out.println(dec);}private static final String key0 = "aaaaaaa";private static final Charset charset = Charset.forName("UTF-8");private static byte[] keyBytes = key0.getBytes(charset);// 加密public static String encode(String enc) {byte[] b = enc.getBytes(charset);for (int i = 0, size = b.length; i < size; i++) {for (byte keyBytes0 : keyBytes) {b[i] = (byte) (b[i] ^ keyBytes0);}}return new String(b);}// 解密public static String decode(String dec) {byte[] e = dec.getBytes(charset);byte[] dee = e;for (int i = 0, size = e.length; i < size; i++) {for (byte keyBytes0 : keyBytes) {e[i] = (byte) (dee[i] ^ keyBytes0);}}return new String(e);}/***********************************************************************//** * 文忠接口需要的秘钥 */private static final String MD5_SEED = "bbbbbbbbkeykey";private static String getVerifyCode(String md5, String verifyCode) {return getMD5Value(md5 + getCurrentDate() + verifyCode);}private static String getCurrentDate() {StringBuffer buffer = new StringBuffer();Calendar now = Calendar.getInstance();String monthValue = null;String dayValue = null;int year = now.get(Calendar.YEAR);int month = now.get(Calendar.MONTH) + 1;int DAY_OF_MONTH = now.get(Calendar.DAY_OF_MONTH);if (month < 10) {monthValue = "0" + String.valueOf(month);} else {monthValue = String.valueOf(month);}if (DAY_OF_MONTH < 10) {dayValue = "0" + String.valueOf(DAY_OF_MONTH);} else {dayValue = String.valueOf(DAY_OF_MONTH);}return buffer.append(year).append(monthValue).append(dayValue).toString();}private static String getMD5Value(String preValue) {String resultString = null;if (preValue != null && preValue.length() != 0) {try {MessageDigest md = MessageDigest.getInstance("MD5");resultString = byteToString(md.digest(preValue.getBytes()));} catch (NoSuchAlgorithmException e) {e.printStackTrace();}}return resultString;}// 转换字节数组为16进制字串private static String byteToString(byte[] bByte) {StringBuffer sBuffer = new StringBuffer();for (int i = 0; i < bByte.length; i++) {sBuffer.append(byteToArrayString(bByte[i]));}return sBuffer.toString();}// 返回形式为数字跟字符串private static String byteToArrayString(byte bByte) {int iRet = bByte;if (iRet < 0) {iRet += 256;}int iD1 = iRet / 16;int iD2 = iRet % 16;return strDigits[iD1] + strDigits[iD2];}// 全局数组private final static String[] strDigits = { "0", "1", "2", "3", "4", "5","6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };}