Java使用Cipher.getInstance(“AES/ECB/PKCS5Padding“)；加解密算法工具类实现

Cipher.getInstance("AES/ECB/PKCS5Padding");加解密算法

public class CipherUtils {
 
	/**
	 * 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";
 
	/**
	 * SecretKeySpec类是KeySpec接口的实现类,用于构建秘密密钥规范
	 */
	private SecretKeySpec key;
 
	public CipherUtils(String hexKey) {
		key = new SecretKeySpec(hexKey.getBytes(), ALGORITHM);
	}
 
	/**
	 * AES加密
	 * 
	 * @param data
	 * @return
	 */
	public String encryptData(String data) {
		try {
			Cipher cipher = Cipher.getInstance(ALGORITHM_STR); // 创建密码器
			cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
			return new BASE64Encoder().encode(cipher.doFinal(data.getBytes("utf-8")));
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
 
	/**
	 * AES解密
	 * 
	 * @param data
	 * @return
	 */
	public String decryptData(String data) {
		try {
			Cipher cipher = Cipher.getInstance(ALGORITHM_STR);
			cipher.init(Cipher.DECRYPT_MODE, key);
			return new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(data)), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
 
}
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