SHA加密算法工具类

1、利用Apache的工具类实现加密： 
maven：

  <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>${common-codec.version}</version>
  </dependency>

实现代码：

   /***
     *  利用Apache的工具类实现SHA-256加密
     * @param str 加密后的报文
     * @return
     */
    public static String getSHA256Str(String str){
        MessageDigest messageDigest;
        String encdeStr = "";
        try {
            messageDigest = MessageDigest.getInstance("SHA-256");
            byte[] hash = messageDigest.digest(str.getBytes("UTF-8"));
            encdeStr = Hex.encodeHexString(hash);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return encdeStr;
    }

2、利用java自带的实现加密：

 /**
     *  利用java原生的摘要实现SHA256加密
     * @param str 加密后的报文
     * @return
     */
    public static String getSHA256StrJava(String str){
        MessageDigest messageDigest;
        String encodeStr = "";
        try {
            messageDigest = MessageDigest.getInstance("SHA-256");
            messageDigest.update(str.getBytes("UTF-8"));
            encodeStr = byte2Hex(messageDigest.digest());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return encodeStr;
    }

    /**
     * 将byte转为16进制
     * @param bytes
     * @return
     */
    private static String byte2Hex(byte[] bytes){
        StringBuffer stringBuffer = new StringBuffer();
        String temp = null;
        for (int i=0;i<bytes.length;i++){
            temp = Integer.toHexString(bytes[i] & 0xFF);
            if (temp.length()==1){
                //1得到一位的进行补0操作
                stringBuffer.append("0");
            }
            stringBuffer.append(temp);
        }
        return stringBuffer.toString();
    }

扩展链接：

https://mp.weixin.qq.com/s?__biz=MzIxMjE5MTE1Nw==&mid=2653191642&idx=1&sn=47c6340a6664af2f62e6c580528ea6f6&chksm=8c990f00bbee861698daa51b0622e581b3279c0759a16330fe538de745cb6abed8288b0bd778&mpshare=1&scene=1&srcid=1016l1hnTNPE8KWZQFXt1DGg#rd