关于“Cannot find any provider supporting AES/ECB/PKCS7Padding”问题的解决方案

import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.InvalidParameterSpecException;/**
* java对称解密的方法
*/
public class AesUtil { static {
//BouncyCastle是一个开源的加解密解决方案，主页在http://www.bouncycastle.org/
Security.addProvider(new BouncyCastleProvider());
} /**
* AES解密
*
* @param data //密文，被加密的数据
* @param key //秘钥
* @param iv //偏移量
* @param encodingFormat //解密后的结果需要进行的编码
* @return
* @throws Exception
*/
public static String decrypt(String data, String key, String iv, String encodingFormat)
throws Exception { //被加密的数据
byte[] dataByte = Base64.decodeBase64(data);
//加密秘钥
byte[] keyByte = Base64.decodeBase64(key);
//偏移量
byte[] ivByte = Base64.decodeBase64(iv);
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
parameters.init(new IvParameterSpec(ivByte));
cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
byte[] resultByte = cipher.doFinal(dataByte);
if (null != resultByte && resultByte.length > 0) {
String result = new String(resultByte, encodingFormat);
return result;
}
return null;
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidParameterSpecException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (InvalidAlgorithmParameterException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}}