AES加密工具类

记一下AES加密工具类

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

import org.apache.tomcat.util.codec.binary.Base64;

public class AESUtils {

	/**
	 * 默认编码
	 */
	private static final String CHARSET = "utf-8";
	/**
	 * 密钥算法
	 */
	private static final String ALGORITHM = "AES";
	/**
	 * 加解密算法/工作模式/填充方式
	 */
	private static final String ALGORITHM_STR = "AES/ECB/PKCS5Padding";

	/**
	 * AES加密字符串
	 *
	 * @param data   待加密字符串
	 * @param AESKey 解密密钥
	 * @return 加密后内容
	 */
	public static String encrypt(String data, String AESKey) {
		try {
			Cipher cipher = Cipher.getInstance(ALGORITHM_STR); // 创建密码器
			SecretKeySpec key = new SecretKeySpec(AESKey.getBytes(CHARSET), ALGORITHM);
			cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
			byte[] encryptResult = cipher.doFinal(data.getBytes(CHARSET)); // 加密后接口
			Base64 base64 = new Base64();
			return new String(base64.encode(encryptResult), CHARSET);
		} catch (Exception e) {
			System.out.println(e);
		}
		return null;
	}

	/**
	 * 
	 * @param content 待解密内容
	 * @param AESKey  解密密钥
	 * @return
	 */
	public static String decrypt(String content, String AESKey) {
		try {
			SecretKeySpec key = new SecretKeySpec(AESKey.getBytes(CHARSET), ALGORITHM);
			Cipher cipher = Cipher.getInstance(ALGORITHM_STR);
			cipher.init(Cipher.DECRYPT_MODE, key);
			Base64 base64 = new Base64();
			byte[] result = cipher.doFinal(base64.decode(content));
			return new String(result,CHARSET); // 解密
		} catch (Exception e) {
			System.out.println(e);
		}
		return null;
	}
}