import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

import org.apache.commons.codec.binary.Base64;

/**
* 运算模式CBC。<br>
* 在CBC模式下使用key,向量iv;<br>
* 对字符加密时，双方采用的都是UTF-8编码
* @version 1.0.0
*/
public class DesUtil {

// 向量
private static final byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 };

/**
* CBC解密
*
* @param key
* 密钥
* @param data
* Base64编码的密文
* @return 明文
* @throws Exception
*/
public static byte[] desDecodeCBC(byte[] key, byte[] data) throws Exception {
Key deskey = null;
DESKeySpec spec = new DESKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DES");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}

/**
* CBC解密
*
* @param key
* 密钥
* @param data
* Base64加密后的密文
* @return 明文
* @throws Exception
*/
public static String desDecodeCBC(String key, String data) throws Exception {
byte[] _data = Base64.decodeBase64(data);
byte[] _key = key.getBytes("UTF-8");
byte[] bOut = desDecodeCBC(_key, _data);

return new String(bOut, "UTF-8");
}

/**
* CBC加密
*
* @param key
* 密钥
* @param data
* 明文
* @return 密文
* @throws Exception
*/
public static byte[] desEncodeCBC(byte[] key, byte[] data) throws Exception {
Key deskey = null;
DESKeySpec spec = new DESKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DES");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); // 加密方法／运算模式／填充模式
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
byte[] bOut = cipher.doFinal(data);
return bOut;
}

/**
* CBC加密
*
* @param key
* 密钥
* @param data
* 明文
* @return Base64加密后的密文
* @throws Exception
*/
public static String desEncodeCBC(String key, String data) throws Exception {
byte[] _data = data.getBytes("UTF-8");
byte[] _key = key.getBytes("UTF-8");
byte[] bOut = desEncodeCBC(_key, _data);

return Base64.encodeBase64String(bOut); // Base64加密后的密文
}

public static void main(String[] args) throws Exception {

String key = "hdhhdhdmZtmcOlmT2";
String data = "学习测试";

System.out.println("加密解密 测试 ");
String str1 = desEncodeCBC(key, data);// 加密
String str2 = desDecodeCBC(key, str1);// 解密
System.out.println(str1);
System.out.println(str2);

}
}