package com.eabax.plugin.yundada.utils; import java.io.IOException; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.security.spec.InvalidKeySpecException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.apache.commons.codec.binary.Base64; import sun.misc.BASE64Decoder; public class DESEncryptHelper {     private final static String DES = "DES";     /**      * 生成密钥      * @param employeeCode      */     public static String getDESKey(String encryptStr){         if (!CacheManager.getCache().containsKey("encryptKey_"+encryptStr)) {             CacheManager.getCache().put("encryptKey_"+encryptStr, encryptStr+"tablemiyaokey");         }         String key = (String) CacheManager.getCache().get("encryptKey_"+encryptStr);         return key;     }      /**      * Description 根据键值进行解密      * @param data      * @param key  加密键byte数组      * @return      * @throws IOException      * @throws Exception      */     public static String decrypt(String data, String key) throws IOException,             Exception {         if (data == null)             return null;         BASE64Decoder decoder = new BASE64Decoder();         byte[] buf = decoder.decodeBuffer(data);         byte[] bt = decrypt(buf,key.getBytes());         return new String(bt);     }     /**      * 对字符串加密      * @param str      * @return      * @throws InvalidKeyException      * @throws IllegalBlockSizeException      * @throws BadPaddingException      * @throws InvalidKeySpecException      * @throws NoSuchAlgorithmException      * @throws NoSuchPaddingException      */     public static String getEncryptStr(String str,String encryptStr) throws InvalidKeyException,             IllegalBlockSizeException, BadPaddingException,             InvalidKeySpecException, NoSuchAlgorithmException,             NoSuchPaddingException {         //获取key         String key = getDESKey(encryptStr);         //获取密钥         SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");         DESKeySpec keyspec = new DESKeySpec(key.getBytes());         SecretKey deskey = factory.generateSecret(keyspec);         // Cipher负责完成加密或解密工作         Cipher c = Cipher.getInstance("DES");         // 根据密钥，对Cipher对象进行初始化，DECRYPT_MODE表示加密模式          c.init(Cipher.ENCRYPT_MODE, deskey);         byte[] src = str.getBytes();         // 该字节数组负责保存加密的结果         byte[] cipherByte = c.doFinal(src);         String enstr = new String(Base64.encodeBase64(cipherByte));         return enstr;     }      /**      * Description 根据键值进行解密      * @param data      * @param key  加密键byte数组      * @return      * @throws Exception      */     private static byte[] decrypt(byte[] data, byte[] key) throws Exception {         // 生成一个可信任的随机数源         SecureRandom sr = new SecureRandom();         // 从原始密钥数据创建DESKeySpec对象         DESKeySpec dks = new DESKeySpec(key);         // 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);         SecretKey securekey = keyFactory.generateSecret(dks);         // Cipher对象实际完成解密操作         Cipher cipher = Cipher.getInstance(DES);         // 用密钥初始化Cipher对象         cipher.init(Cipher.DECRYPT_MODE, securekey, sr);         return cipher.doFinal(data);     } }