base64加密的解密

[java] view plain copy

1. package

   com.sms.utils;

4. import

   java.util.HashMap;

5. import

   java.util.Map;

7. import

   javax.crypto.Cipher;

8. import

   javax.crypto.spec.IvParameterSpec;

9. import

   javax.crypto.spec.SecretKeySpec;

11. import

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

12. import

    org.apache.commons.lang3.StringUtils;

14. import

    com.alibaba.fastjson.JSONObject;

17. public

    class

    AESUtils {

18. public

    static

    String key = "123456!@#";

19. public

    static

    String iv = "1234567812345678";
21. /**
22. * 加密
23. *
24. * @param data
25. * @return
26. */

27. public

    static

    String encrypt(String data)

    throws

    Exception {
29. Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

30. int

    blockSize = cipher.getBlockSize();

32. byte

    [] dataBytes = data.getBytes();

33. int

    plaintextLength = dataBytes.length;

34. if

    (plaintextLength % blockSize != 0) {
35. plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
36. }

38. byte

    [] plaintext =

    new

    byte

    [plaintextLength];
39. System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
41. SecretKeySpec keyspec =

    new

    SecretKeySpec(key.getBytes(), "AES");
42. IvParameterSpec ivspec =

    new

    IvParameterSpec(iv.getBytes());
44. cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);

45. byte

    [] encrypted = cipher.doFinal(plaintext);

46. return

    Base64.encodeBase64String(encrypted);
48. }
51. /**
52. * 解密
53. *
54. * @param data
55. * @return
56. */

57. public

    static

    String desEncrypt(String data)

    throws

    Exception {
58. //base64加密串在http中會把"+"號變為" "
59. data = StringUtils.replace(data, " ", "+");
60. // byte[] contentBytes = Base64.decode(data, 0);

61. byte

    [] contentBytes = Base64.decodeBase64(data);
62. Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
63. SecretKeySpec keyspec =

    new

    SecretKeySpec(key.getBytes(), "AES");

64. IvParameterSpec ivspec =

    new

    IvParameterSpec(iv.getBytes());
66. cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

68. byte

    [] original = cipher.doFinal(contentBytes);
69. String originalString =

    new

    String(original);

70. return

    originalString;
72. }

74. public

    static

    void

    main(String[] args)

    throws

    Exception {
75. Map<String, String> map =

    new

    HashMap<String, String>();
76. // map.put("username", "admin");
77. // map.put("password", "123456");
78. System.out.println(AESUtils.encrypt(JSONUtil.toJson(map)));
79. }
81. }

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