SHA-1加密

 1 　　/**
 2      * SHA-1加密
 3      * @param strSrc 要加密的字符串
 4      * @return 加密后的字符串
 5      */
 6     public static String SHAEncrypt(String strSrc) {
 7         MessageDigest md = null;
 8         String strDes = null;
 9         byte[] bt = strSrc.getBytes();
10         try {
11             md = MessageDigest.getInstance("SHA-1");
12             md.update(bt);
13             strDes = bytes2Hex(md.digest());
14         } catch (NoSuchAlgorithmException e) {
15             System.out.println("Invalid algorithm.");
16             return null;
17         }
18         return strDes;
19     }
20 
21     public static String bytes2Hex(byte[] bts) {
22         String des = "";
23         String tmp = null;
24         for (int i = 0; i < bts.length; i++) {
25             tmp = (Integer.toHexString(bts[i] & 0xFF));
26             if (tmp.length() == 1) {
27                 des += "0";
28             }
29             des += tmp;
30         }
31         return des;
32     }
33     //演示
34     @Test
35     public void demo(){
36         System.out.println(SHAEncrypt("1223344"));
37     }