使用DOM和SAX解析器针对xsd进行xml验证

Question

i am validating xml document with xsd. By using sax parser it successfully validates. But when we use DOM parser it gives error that " Validator Class: com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl

org.xml.sax.SAXParseException; cvc-elt.1: Cannot find the declaration of element 'diagram'."

 **XSD File** <?xml version="1.0" encoding="UTF-8"?> <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="xmlns:xsi" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="diagram"> <xs:complexType> <xs:sequence> ---- ---- ---- **XML File** <?xml version="1.0" encoding="UTF-8"?> <diagram xmlns="xmlns:xsi"> <class name="Customer"> 

EDIT:

Simplified XSD (schema1.xsd)

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="xmlns:xsi" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="diagram">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="class" type="xs:string"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

Simplified XML (xml1.xml):

<diagram xmlns="xmlns:xsi">
    <class>classe</class>
</diagram>

Minimal code to reproduce:

// load document
// Get Document Builder
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();

// Build Document
Document doc = builder.parse(new File("./resources/xml1.xml"));

SchemaFactory aSF = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = aSF.newSchema(new File("schema1.xsd"));
Validator validator = schema.newValidator();

Source dsource = new DOMSource(doc);
validator.validate(dsource);

Answer 1

your targetNamespace definition is unusual (it looks like a prefix declaration in itself). Moreover it is using the 'reserved' xsi prefix which is generally used by "Xml Schema Instance".

Maybe the DOM validation is getting tricked by this "fake" xmlns:xsi prefix somehow, can you try with another namespace value than xmlns:xsi to see if you have different result ?

EDIT

After a bit of search, it is because the DOM created is not namespace-aware . To fix it you should simply set your documentBuilder as namespace-aware:

factory.setNamespaceAware(true);

This was fixing the issue in my case.