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   源码介绍

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等同于 C# 的AES 加密解密方法ECB/PKCS7Padding，如下：

            AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
            aes.Key = Encoding.Default.GetBytes(key);
            aes.Mode = CipherMode.ECB;
            aes.Padding = PaddingMode.PKCS7;

import java.security.Security;

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

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;

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

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


import javax.crypto.Cipher;
import javax.crypto.Mac;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;/**
 *
 * @author Ajit
 *
 *         AES 128 bit ECB PKCS7 padding example
 *
 */

public class AES128ECBwithPKCS7 {

    //add new bouncycastle ciphers
    static {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    }

    public static void main(String[] args) {

        // encryption key should be multiple of 16 character long
        String key = "abcdefghijklmnop";
        String data = "0123456789";

        String encrypted = AES128ECBwithPKCS7.encrypt(data, key);
        System.out.println("加密后数据: "   encrypted);
        String decrypted = AES128ECBwithPKCS7.decrypt(AES128ECBwithPKCS7.encrypt(data, key), key);
        System.out.println("解密后数据: "   decrypted);
    }

    /**
     * encrypt input text
     *
     * @param input
     * @param key
     * @return
     */
    public static String encrypt(String input, String key) {
        byte[] crypted = null;
        try {

            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");

            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
            cipher.init(Cipher.ENCRYPT_MODE, skey);
            crypted = cipher.doFinal(input.getBytes());
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
        }

        //return new String(Base64.encodeBase64(crypted));
        return new String(Hex.encodeHex(crypted)).toUpperCase();
//        return new String(Base64.encodeBase64(crypted));
    }

    /**
     * decrypt input text
     *
     * @param input
     * @param key
     * @return
     */
    public static String decrypt(String input, String key) {
        byte[] output = null;
        try {
            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
            cipher.init(Cipher.DECRYPT_MODE, skey);
//            output = cipher.doFinal(Base64.decodeBase64(input));
            output = cipher.doFinal(Hex.decodeHex(input.toCharArray()));
        } catch (Exception e) {
            System.out.println(e.toString());
        }
        return new String(output);
    }

}