java:

1 　　public static String SHA1(String decript) { 2         try { 3             MessageDigest digest = MessageDigest.getInstance("SHA-1"); 4             digest.update(decript.getBytes("UTF-8")); 5             byte[] messageDigest = digest.digest(); 6             StringBuilder hexString = new StringBuilder(); 7             for (byte message : messageDigest) { 8                 String shaHex = Integer.toHexString(message & 0xFF); 9                 if (shaHex.length() < 2)10                     hexString.append(0);11 12                 hexString.append(shaHex);13             }14             return hexString.toString().toLowerCase();15         } catch (Exception e) {16             e.printStackTrace();17         }18         return "";19     }

c# :

1         /// 
   2         /// SHA1 加密，返回大写字符串   3         /// 
   4         /// 需要加密字符串   5         /// 
     
      返回40位UTF8 大写
        6         public static string SHA1(string content) 7         { 8             return SHA1(content, Encoding.UTF8).ToLower(); 9         }10         /// 
  11         /// SHA1 加密，返回大写字符串  12         /// 
  13         /// 需要加密字符串  14         /// 指定加密编码  15         /// 
     
      返回40位大写字符串
       16         public static string SHA1(string content, Encoding encode)17         {18             try19             {20                 SHA1 sha1 = new SHA1CryptoServiceProvider();21                 byte[] bytes_in = encode.GetBytes(content);22                 byte[] bytes_out = sha1.ComputeHash(bytes_in);23                 sha1.Dispose();24 25                 var sb = new StringBuilder();26                 foreach (byte b in bytes_out)27                 {28                     sb.Append(b.ToString("x2"));29                 }30                 //所有字符转为小写31                 return sb.ToString().ToLower();32             }33             catch (Exception ex)34             {35                 throw new Exception("SHA1加密出错：" + ex.Message);36             }37         }