使用 bouncycastle實現 AES

import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.security.Security;

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

import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class AES {

	private static byte[] iv = { 0x38, 0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x38, 0x37,
			0x36, 0x35, 0x34, 0x33, 0x32, 0x31 };
	static {
		Security.addProvider(new BouncyCastleProvider());
	}

	/**
	 * 加密
	 * @param content  需要加密的內容
	 * @param password  加密密碼
	 * @return
	 * @throws UnsupportedEncodingException 
	 */
	public static byte[] encrypt(byte[] content, String password) throws Exception {
		Key key = new SecretKeySpec(password.getBytes("utf-8"), "AES");
		Cipher in = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
		in.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
		byte[] enc = in.doFinal(content);
		return enc;
	}

	/**
	 * 解密
	 * @param content 待解密內容
	 * @param password 解密密鑰
	 * @return
	 * @throws UnsupportedEncodingException 
	 */
	public static byte[] decrypt(byte[] content, String password) throws Exception {
		Key key = new SecretKeySpec(password.getBytes("utf-8"), "AES");
		Cipher out = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
		out.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
		byte[] dec = out.doFinal(content);
		return dec;
	}

	public static void main(String[] args) throws Exception{
 		String key = "11147169444463676897639210105259";
		byte[] result =encrypt("加密字符串".getBytes("utf-8"),key);
		System.out.println(new String(result,"utf-8"));
		result = decrypt(result,key);
		System.out.println(new String(result,"utf-8"));
	}

}