1 package testEncrypt;
 2
 3 import java.security.InvalidKeyException;
 4 import java.security.Key;
 5 import java.security.NoSuchAlgorithmException;
 6 import java.security.SecureRandom;
 7
 8 import javax.crypto.BadPaddingException;
 9 import javax.crypto.Cipher;
10 import javax.crypto.IllegalBlockSizeException;
11 import javax.crypto.KeyGenerator;
12 import javax.crypto.NoSuchPaddingException;
13 import javax.crypto.SecretKey;
14 import javax.crypto.spec.SecretKeySpec;
15
16 import org.apache.commons.codec.binary.Base64;
17 //import sun.misc.BASE64Encoder;
18 public class TestAesEncrypt {
19
20     public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException {
21         //随机生成密钥
22         KeyGenerator keygen = KeyGenerator.getInstance("AES");
23         //SecureRandom random = new SecureRandom(Base64.decodeBase64("abc"));
24         SecureRandom random = new SecureRandom();
25         keygen.init(random);
26         Key key = keygen.generateKey();
27         //获取秘钥字符串
28         String key64Str = Base64.encodeBase64String(key.getEncoded());
29         //要加密的数据
30         String dataStr="da89gh9qj3ebg9babjdslgbuqgb&FTUG^(GB";
31         System.out.println("要加密的数据："+dataStr);
32
33         //还原秘钥字符串到秘钥byte数组
34         byte[] keyByteArray = Base64.decodeBase64(key64Str);
35         //重新形成秘钥，SecretKey是Key的子类
36         SecretKey secretKey = new SecretKeySpec(keyByteArray, "AES");
37
38         //初始化加密组件
39         Cipher cipher = Cipher.getInstance("AES");
40         cipher.init(Cipher.ENCRYPT_MODE, secretKey);
41
42         //加密后的数据，首先将字符串转为byte数组，然后加密，为便于保存先转为base64
43         String encryptedDataStr = Base64.encodeBase64String(cipher.doFinal(dataStr.getBytes()));
44         System.out.println("加密后的数据："+encryptedDataStr);
45
46         //将加密组件的模式改为解密
47         cipher.init(Cipher.DECRYPT_MODE, secretKey);
48          //和上面的加密相反，先解base64，再解密，最后将byte数组转为字符串
49          String decodeDataStr = new String(cipher.doFinal(Base64.decodeBase64(encryptedDataStr)));
50          System.out.println("解密后的数据："+decodeDataStr);
51     }
52
53 }