SHA1加密JAVA

电玩女神 2022-05-22 03:35 213阅读 0赞

1.  /\*
2.   \* 微信公众平台(JAVA) SDK
3.   \*
4.   \* Copyright (c) 2016, Ansitech Network Technology Co.,Ltd All rights reserved.
5.   \* http://www.ansitech.com/weixin/sdk/
6.   \*
7.   \* Licensed under the Apache License, Version 2.0 (the "License");
8.   \* you may not use this file except in compliance with the License.
9.   \* You may obtain a copy of the License at
10.  \*
11.  \* http://www.apache.org/licenses/LICENSE-2.0
12.  \*
13.  \* Unless required by applicable law or agreed to in writing, software
14.  \* distributed under the License is distributed on an "AS IS" BASIS,
15.  \* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16.  \* See the License for the specific language governing permissions and
17.  \* limitations under the License.
18.  \*/
19. **package** com.levi.utils; 
20. 
21. **import** java.security.MessageDigest; 
22. 
23. /\*\*
24.  \* <p>Title: SHA1算法</p>
25.  \*
26.  \* @author levi
27.  \*/
28. **public****final****class** SHA1 \{ 
29. 
30. **private****static****final****char**\[\] HEX\_DIGITS = \{ '0', '1', '2', '3', '4', '5', 
31. '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'\}; 
32. 
33. /\*\*
34.  \* Takes the raw bytes from the digest and formats them correct.
35.  \*
36.  \* @param bytes the raw bytes from the digest.
37.  \* @return the formatted bytes.
38.  \*/
39. **private****static** String getFormattedText(**byte**\[\] bytes) \{ 
40. **int** len = bytes.length; 
41.  StringBuilder buf = **new** StringBuilder(len \* 2); 
42. // 把密文转换成十六进制的字符串形式
43. **for** (**int** j = 0; j < len; j++) \{ 
44.  buf.append(HEX\_DIGITS\[(bytes\[j\] >> 4) & 0x0f\]); 
45.  buf.append(HEX\_DIGITS\[bytes\[j\] & 0x0f\]); 
46.  \} 
47. **return** buf.toString(); 
48.  \} 
49. 
50. **public****static** String encode(String str) \{ 
51. **if** (str == **null**) \{ 
52. **return****null**; 
53.  \} 
54. **try** \{ 
55.  MessageDigest messageDigest = MessageDigest.getInstance("SHA1"); 
56.  messageDigest.update(str.getBytes()); 
57. **return** getFormattedText(messageDigest.digest()); 
58.  \} **catch** (Exception e) \{ 
59. **throw****new** RuntimeException(e); 
60.  \} 
61.  \} 
62. \}