Java.Utils：AES-128-CBC 加密方式

<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk16 -->
<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk16</artifactId>
    <version>1.46</version>
</dependency>

package org.bood.common.utils;

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;

/** * AES-128-CBC 加密方式 </br> * 注：</br> * AES-128-CBC 可以自己定义“密钥”和“偏移量“。</br> * AES-128 是 jdk 自动生成的“密钥”。</br> * * @author bood * @since 2020/10/16 */
public class AesCbcUtils { 
   

    private AesCbcUtils() { 
   
    }

    static { 
   
        // BouncyCastle是一个开源的加解密解决方案
        Security.addProvider(new BouncyCastleProvider());
    }

    /** * <p> * AES 解密 * </p> * * @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：java.lang.String * @author：bood * @date：2020/10/16 */
    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/PKCS7Padding");
            SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
            AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
            parameters.init(new IvParameterSpec(ivByte));
            // 初始化
            cipher.init(Cipher.DECRYPT_MODE, spec, parameters);
            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;
    }

}