package com.bsd.yx;import java.security.Key;import java.security.Security;import java.text.SimpleDateFormat;import java.util.Date;import javax.crypto.Cipher;import com.ibm.model.cxf.Safety;/*** 加密与解密* @author tanf* @date -11-08*/public class EncryptionDecryption {/*** 默认密钥*/private static String strDefaultKey = "tandaly24335";/** 加密工具 */private static Cipher encryptCipher = null;/** 解密工具 */private static Cipher decryptCipher = null;/*** 将byte数组转换为表示16进制值的字符串， 如：byte[]{8,18}转换为：0813， 和public static byte[]* hexStr2ByteArr(String strIn) 互为可逆的转换过程* * @param arrB* 需要转换的byte数组* @return 转换后的字符串* @throws Exception* */public static String byteArr2HexStr(byte[] arrB) throws Exception {int iLen = arrB.length;// 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍StringBuffer sb = new StringBuffer(iLen * 2);for (int i = 0; i < iLen; i++) {int intTmp = arrB[i];// 把负数转换为正数while (intTmp < 0) {intTmp = intTmp + 256;}// 小于0F的数需要在前面补0if (intTmp < 16) {sb.append("0");}sb.append(Integer.toString(intTmp, 16));}return sb.toString();}/*** 将表示16进制值的字符串转换为byte数组， 和public static String byteArr2HexStr(byte[] arrB)* 互为可逆的转换过程* * @param strIn* 需要转换的字符串* @return 转换后的byte数组* @throws Exception* */public static byte[] hexStr2ByteArr(String strIn) throws Exception {byte[] arrB = strIn.getBytes();int iLen = arrB.length;// 两个字符表示一个字节，所以字节数组长度是字符串长度除以2byte[] arrOut = new byte[iLen / 2];for (int i = 0; i < iLen; i = i + 2) {String strTmp = new String(arrB, i, 2);arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);}return arrOut;}/*** 默认构造方法，使用默认密钥* * @throws Exception*/public EncryptionDecryption() throws Exception {this(strDefaultKey);}/*** 指定密钥构造方法* * @param strKey* 指定的密钥* @throws Exception*/public EncryptionDecryption(String strKey) throws Exception {Security.addProvider(new com.sun.crypto.provider.SunJCE());Key key = getKey(strKey.getBytes());encryptCipher = Cipher.getInstance("DES");encryptCipher.init(Cipher.ENCRYPT_MODE, key);decryptCipher = Cipher.getInstance("DES");decryptCipher.init(Cipher.DECRYPT_MODE, key);}/*** 加密字节数组* * @param arrB* 需加密的字节数组* @return 加密后的字节数组* @throws Exception*/public static byte[] encrypt(byte[] arrB) throws Exception {return encryptCipher.doFinal(arrB);}/*** 加密字符串* * @param strIn* 需加密的字符串* @return 加密后的字符串* @throws Exception*/public static String encrypt(String strIn) throws Exception {return byteArr2HexStr(encrypt(strIn.getBytes()));}/*** 解密字节数组* * @param arrB* 需解密的字节数组* @return 解密后的字节数组* @throws Exception*/public static byte[] decrypt(byte[] arrB) throws Exception {return decryptCipher.doFinal(arrB);}/*** 解密字符串* * @param strIn* 需解密的字符串* @return 解密后的字符串* @throws Exception*/public static String decrypt(String strIn) throws Exception {try {return new String(decrypt(hexStr2ByteArr(strIn)));} catch (Exception e) {return "";}}/*** 从指定字符串生成密钥，密钥所需的字节数组长度为8位 不足8位时后面补0，超出8位只取前8位* * @param arrBTmp* 构成该字符串的字节数组* @return 生成的密钥* @throws java.lang.Exception*/private Key getKey(byte[] arrBTmp) throws Exception {// 创建一个空的8位字节数组（默认值为0）byte[] arrB = new byte[8];// 将原始字节数组转换为8位for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {arrB[i] = arrBTmp[i];}// 生成密钥Key key = new javax.crypto.spec.SecretKeySpec(arrB, "ABC");return key;}/*** 自定义加密* * @param arrBTmp* * @return 生成的密钥* @throws java.lang.Exception*/public static String BPMMD5(String str){try {EncryptionDecryption des = new EncryptionDecryption();// 自定义密钥str= EncryptionDecryption.encrypt(str);System.out.println(str);} catch (Exception e) {e.printStackTrace();}return str;}}
