Java中的XMLSignature中的DigestValue与C#不同

我有一个在C#中运行的程序,它将XMLSignature应用于xml文档.我在两种情况下(C#和Java)都有相同的XML文档,但我没有得到相同的摘要和签名值.我知道我的C程序的结果是正确的,但我不能在Java中正确地得到它们.

这里是C#代码：

      public void SignXml(XmlDocument xmlDoc,RSA Key)
        {
            // Check arguments.
            if (xmlDoc == null)
                throw new ArgumentException("xmlDoc");
            if (Key == null)
                throw new ArgumentException("Key");

            // Create a SignedXml object.
            SignedXml signedXml = new SignedXml(xmlDoc);

            // Add the key to the SignedXml document.
            signedXml.SigningKey = Key;

            // Create a reference to be signed.
            Reference reference = new Reference();
            reference.Uri = "";

            // Add an enveloped transformation to the reference.
            XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
            reference.AddTransform(env);

            // Add the reference to the SignedXml object.
            signedXml.AddReference(reference);

            KeyInfo ki = new KeyInfo();
            KeyInfoX509Data clause = new KeyInfoX509Data();
            clause.AddCertificate(x509_2);
            clause.AddIssuerSerial(x509_2.Issuer,x509_2.GetSerialNumberString());
            ki.AddClause(clause);
            signedXml.KeyInfo = ki;

            // Compute the signature.
            signedXml.ComputeSignature();

            // Get the XML representation of the signature and save
            // it to an XmlElement object.
            XmlElement xmlDigitalSignature = signedXml.GetXml();

            //xmlDoc.Save("antes_firma.xml");
            // Append the element to the XML document.
            xmlDoc.DocumentElement.AppendChild(xmlDoc.ImportNode(xmlDigitalSignature,true));


        }

Java代码如下：

DOMSignContext dsc = new DOMSignContext (pk,doc.getDocumentElement()); 
            XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");

            Reference ref = fac.newReference ("",fac.newDigestMethod(DigestMethod.SHA1,null),Collections.singletonList
                        (fac.newTransform(Transform.ENVELOPED,(TransformParameterSpec) null)),null,null);

            SignedInfo si = fac.newSignedInfo
                      (fac.newCanonicalizationMethod
                        (CanonicalizationMethod.INCLUSIVE,(C14NMethodParameterSpec) null),fac.newSignatureMethod(SignatureMethod.RSA_SHA1,Collections.singletonList(ref)); 

            KeyInfoFactory kif = fac.getKeyInfoFactory();
            X509IssuerSerial issuerSerial = kif.newX509IssuerSerial(cert2.getIssuerDN().getName(),cert.getSerialNumber());
            List x509Content = new ArrayList();
            x509Content.add(issuerSerial);
            x509Content.add(cert2);
            X509Data xd = kif.newX509Data(x509Content);
            KeyInfo ki = kif.newKeyInfo(Collections.singletonList(xd));

            XMLSignature signature = fac.newXMLSignature(si,ki);

            signature.sign(dsc);

使用相同的xml文档,证书和私钥,我在每个文档中获得以下摘要值：

> Java：EZTMZuMvR9D0WSUgbT2AdFYTBh4 =
> C#：EsJDdWiUMIOaQp9CC26wQWA6kJ0 =

为什么会这样？