java DES加密

import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;public class DecStr {public static void main(String args[]) throws Exception {String jiami = Encrypt("中国人民解放军henniuhenniudi", "26451d8f");System.out.println("加密：" + jiami);String jiemi = Decrypt(jiami, "26451d8f");System.out.println("解密：" + jiemi);}/**      * DES算法，解密      *      * @param message 待解密字符串      * @param key  解密私钥，长度不能够小于8位      * @return 解密后的字节数组      * @throws Exception 异常      */ public static String Decrypt(String message, String key)throws Exception {// base64 + des 解密// BASE64Decoder base64Decoder = new BASE64Decoder();// byte[] bytesrc=base64Decoder.decodeBuffer(message);byte[] bytesrc = hex2byte(message.getBytes()); // 不用base64 的方式Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("ISO-8859-1"));SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");SecretKey secretKey = keyFactory.generateSecret(desKeySpec);IvParameterSpec iv = new IvParameterSpec(key.getBytes("ISO-8859-1"));cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);byte[] retByte = cipher.doFinal(bytesrc);return new String(retByte);}/**      * DES算法，加密      *      * @param message 待加密字符串      * @param key  加密私钥，长度不能够小于8位      * @return 加密后的字节数组，一般结合Base64编码使用      * @throws CryptException 异常      */public static String Encrypt(String message, String key)throws Exception {Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("ISO-8859-1"));SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");SecretKey secretKey = keyFactory.generateSecret(desKeySpec);IvParameterSpec iv = new IvParameterSpec(key.getBytes("ISO-8859-1"));cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);byte[] encryptbyte = cipher.doFinal(message.getBytes());// BASE64Encoder base64Encoder = new BASE64Encoder();// base64Encoder.encode(encryptbyte);// return base64Encoder.encode(encryptbyte);return byte2hex(encryptbyte);}public static String byte2hex(byte[] b) {String hs = "";String stmp = "";for (int n = 0; n < b.length; n++) {stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));if (stmp.length() == 1)hs = hs + "0" + stmp;elsehs = hs + stmp;}return hs.toUpperCase();}public static byte[] hex2byte(byte[] b) {if ((b.length % 2) != 0)throw new IllegalArgumentException("长度不是偶数");byte[] b2 = new byte[b.length / 2];for (int n = 0; n < b.length; n += 2) {String item = new String(b, n, 2);b2[n / 2] = (byte) Integer.parseInt(item, 16);}return b2;}}