JAVA实现AES加密与解密

package com.eifesun.monitor.upload.uploader;

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

public class AES {
    public static byte[] encrypt(String text, String password) {
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();

            // padding byte data as 16 * N length 
            byte[] dataBytes = text.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(password.getBytes("UTF-8"), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(password.getBytes("UTF-8"));

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            return cipher.doFinal(plaintext);
            // return new sun.misc.BASE64Encoder().encode(encrypted);
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String decrypt(byte[] encryptedBytes, String password) {
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(password.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(password.getBytes("UTF-8"));

            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

            byte[] original = cipher.doFinal(encryptedBytes);
            return new String(original, "UTF-8");
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

}