Java 和 .NET SHA1算法记录

　　最近做了一个.NET访问Java接口的小Demo，其中用到了SHA1加密，大体思路就是.NET 传一些参数然后SHA1加密，Java端接收到之后在SHA1加密对比。

　　Java代码：

　　

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public final class SHA1 {         private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5',                 '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};           /**          * Takes the raw bytes from the digest and formats them correct.          *          * @param bytes the raw bytes from the digest.          * @return the formatted bytes.          */         private static String getFormattedText(byte[] bytes) {             int len = bytes.length;             StringBuilder buf = new StringBuilder(len * 2);             // 把密文转换成十六进制的字符串形式             for (int j = 0; j < len; j++) {                 buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);                 buf.append(HEX_DIGITS[bytes[j] & 0x0f]);             }             return buf.toString();         }           /**          * 编码          * */         public static String encode(String str) {             if (str == null) {                 return null;             }             try {                 MessageDigest messageDigest = MessageDigest.getInstance("SHA1");                 messageDigest.update(str.getBytes());                 return getFormattedText(messageDigest.digest());             } catch (Exception e) {                 throw new RuntimeException(e);             }         }   }

　　.NET代码

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public  string SHA1(string content, Encoding encode)       {           try           {               SHA1 sha1 = new SHA1CryptoServiceProvider();               byte[] bytes_in = encode.GetBytes(content);               byte[] bytes_out = sha1.ComputeHash(bytes_in);               sha1.Dispose();               StringBuilder ret = new StringBuilder();               foreach (byte b in bytes_out)               {                   //{0:X2} 大写                   ret.AppendFormat("{0:x2}", b);               }               var hex = ret.ToString();               return hex;           }           catch (Exception ex)           {               throw new Exception("SHA1加密出错：" + ex.Message);           }       }

　　经测试，两种加密方法得到的结果是一致的~~