Encryptor.java

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

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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

public class Encryptor {
    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/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, skey);
            crypted = cipher.doFinal(input.getBytes());
        }catch(Exception e){
            System.out.println(e.toString());
        }
        return new String(Base64.encodeBase64(crypted));
    }

    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/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skey);
            output = cipher.doFinal(Base64.decodeBase64(input));
        }catch(Exception e){
            System.out.println(e.toString());
        }
        return new String(output);
    }

    public static String readFromUrl(String url) throws IOException {
        URL website = new URL(url);
        URLConnection connection = website.openConnection();
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringBuilder response = new StringBuilder();
        String inputLine;
        while ((inputLine = in.readLine()) != null)
            response.append(inputLine);
        in.close();
        return response.toString();
    }

    public static void main(String[] args) {
        String key = "1234567891234567";
        String data = "example";
        System.out.println(Encryptor.encrypt(data, key));
    }
}