【常用工具】java aes对称加密工具类

AES对称加密工具类，代码如下：

package com.sszh.utils.security;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * AES对称加密工具类
 */
public class AesEncryption {

    /**
     * 加密数据
     *
     * @param data 明文
     * @param key  秘钥
     * @param iv   秘钥
     */
    public static String Encrypt(String data, String key, String iv) throws Exception {
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();
            byte[] dataBytes = data.getBytes("UTF-8");
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength
                        + (blockSize - (plaintextLength % blockSize));
            }
            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);
            return Base64Method.EncryptBase64(encrypted);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 解密数据
     *
     * @param data 密文
     * @param key  秘钥
     * @param iv   秘钥
     */
    public static String Desencrypt(String data, String key, String iv) throws Exception {
        try {
            byte[] encrypted1 = Base64Method.DecryptBase64ForByte(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original, "UTF-8");
            return originalString;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

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