java实现AES 32位加密解密的方案

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.spec.SecreTKEySpec;
import java.util.Base64;


public class AesUtil {

    
    private static final String DEFAULT_CHARSET = "utf-8";

    
    private static String ALGoRITHM = "AES";


    
    private static final String CipherMode = "AES/ECB/PKCS5Padding";


    
    private final static Logger logger = LoggerFactory.getLogger(AesUtil.class);

    private AesUtil() {
    }

    
    public static String decrypt(String sSrc, String secretKey) {

        if (secretKey == null) {
            logger.error("需要加密的秘钥为空");
            return null;
        }
        try {
            byte[] raw = secretKey.getBytes(DEFAULT_CHARSET);
            SecretKeySpec secretKeySpec = new SecretKeySpec(raw, ALGORITHM);
            Cipher cipher = Cipher.getInstance(CipherMode);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
            // 先用base64解密
            byte[] encryptedArr = Base64.getDecoder().decode(sSrc);
            byte[] original = cipher.doFinal(encryptedArr);
            return new String(original, DEFAULT_CHARSET);
        } catch (Exception ex) {
            logger.error("AES解密失败", ex);
            return null;
        }
    }


    
    public static String encrypt(String sSrc, String sKey) {
        if (sKey == null) {
            logger.error("需要加密的秘钥为空");
            return null;
        }
        try {
            byte[] raw = sKey.getBytes(DEFAULT_CHARSET);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, ALGORITHM);
            Cipher cipher = Cipher.getInstance(CipherMode);
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
            byte[] encrypted = cipher.doFinal(sSrc.getBytes(DEFAULT_CHARSET));

            return Base64.getEncoder().encodeToString(encrypted);
        } catch (Exception ex) {
            logger.error("AES加密失败", ex);
            return null;
        }
    }

}