Content-MD5计算方法

public static void main(String[] args) {

        System.out.println("结果：" + getStringContentMD5("D:/无微信“轻流产品介绍”.pdf"));
    }

    /***
    * 计算字符串的Content-MD5
    * @param str 文件路径
    * @return
    */
    public static String getStringContentMD5(String str) {
        // 获取文件MD5的二进制数组（128位）
        byte[] bytes = getFileMD5Bytes1282(str);
        // 对文件MD5的二进制数组进行base64编码
        return new String(Base64.encodeBase64(bytes));
    }

    /***
     * 获取文件MD5-二进制数组（128位）
     * 
     * @param filePath
     * @return
     * @throws IOException
     */
    public static byte[] getFileMD5Bytes1282(String filePath) {
        FileInputStream fis = null;
        byte[] md5Bytes = null;
        try {
            File file = new File(filePath);
            fis = new FileInputStream(file);
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            byte[] buffer = new byte[1024];
            int length = -1;
            while ((length = fis.read(buffer, 0, 1024)) != -1) {
                md5.update(buffer, 0, length);
            }
            md5Bytes = md5.digest();
            fis.close();
        } catch (FileNotFoundException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        } catch (IOException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
        return md5Bytes;
    }

$contentBase64Md5 = getContentBase64Md5($filePath);

function getContentBase64Md5($filePath){
    //获取文件MD5的128位二进制数组
    $md5file = md5_file($filePath,true);
    //计算文件的Content-MD5
    $contentBase64Md5 = base64_encode($md5file);
    echo ("contentBase64Md5=".$contentBase64Md5);
    return $contentBase64Md5;
}

public static string GetContentMD5FromFile(string filePath)
        {
            string ContentMD5 = null;
            try
            {
                FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                // 先计算出上传内容的MD5，其值是一个128位（128 bit）的二进制数组
                byte[] retVal = md5.ComputeHash(file);
                file.Close();
                // 再对这个二进制数组进行base64编码
                ContentMD5 = Convert.ToBase64String(retVal).ToString();
                MessageBox.Show("MD5:" + ContentMD5);
                return ContentMD5;
            }
            catch (Exception ex)
            {
                MessageBox.Show("错误信息", "计算文件的Content-MD5值时发生异常：" + ex.Message);
                return ContentMD5;
            }
        }