使用xsd作为源的XML验证

Question

I want to validate my xml with xsd sxheme. When I load xsd as new File() - al is ok. But I can't do this 'xos of .jar. So i use this code to load xsd

public static boolean init() {
    try (InputStream isSchema = Thread.currentThread().getContextClassLoader().getResourceAsStream(XSD_PATH)) {
        System.out.println(getStringFromInputStream(isSchema));
        schemaSource = new StreamSource(isSchema);
    }
    catch (IOException e) {
        logger.debug(e.toString());
        return false;
    }

    return true;
}

isScheme object has valid content of .xsd file. But when I call it

    private boolean validateXML(File xmlFile) {
    try (InputStream stream = new FileInputStream(xmlFile)) {
        Source xmlSource = new StreamSource(stream);
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
            .newSchema(schemaSource)
            .newValidator()
            .validate(xmlSource);
    }
    catch (Exception e) {
        logger.debug("ERROR XML parsing for [" + xmlFile.getName() + "] : " + e.toString());
        return false;
    }

    return true;
}

An error occurs

DEBUG Task:82 - ERROR XML parsing for [test good 4 - копия - копия (380) - копия - копия - копия - копия - копия - копия.xml] : org.xml.sax.SAXParseException; schema_reference.4: Failed to read schema document 'null', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not .

This is my XSD file

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Entry">
    <xs:complexType>
        <xs:all>
            <xs:element name="content">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:maxLength value="1024" />
                        <xs:minLength value="0" />
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="creationDate">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:length value="19" />
                        <xs:pattern value="[1-2][0-9][0-9][0-9]-[0-1][0-9]-[0-3][0-9] [0-2][0-9]:[0-5][0-9]:[0-5][0-9]"></xs:pattern>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
        </xs:all>
    </xs:complexType>
</xs:element>
</xsd:schema>

Example of xml

  <?xml version="1.0" encoding="UTF-8"?>
  <Entry>
    <content>any message</content>
    <creationDate>2016-06-15 20:20:20</creationDate>
  </Entry>

Help me please.

I change mu code to this

    try (InputStream stream = new FileInputStream(xmlFile)) {
        isSchema = Thread.currentThread().getContextClassLoader().getResourceAsStream(XSD_PATH);
        schemaSource = new StreamSource(isSchema);
        Source xmlSource = new StreamSource(stream);
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
            .newSchema(schemaSource)
            .newValidator()
            .validate(xmlSource);
    }

and to this

try (InputStream stream = new FileInputStream(xmlFile)) {
        InputStream isSchema = Thread.currentThread().getContextClassLoader().getResourceAsStream(XSD_PATH);
        Source schemaSource = new StreamSource(isSchema);
        Source xmlSource = new StreamSource(stream);
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
            .newSchema(schemaSource)
            .newValidator()
            .validate(xmlSource);
    }

But the same error.

Answer 1

Looking at the source of StreamSource here :

The StreamSource constructor which takes InputStream merely calls the setter. So the underlying inputstream must be kept open to be able to read from the streamSource.

When the try within your init() completes, it closes the inputstream, so I the streamsource instance ( schemaSource ) becomes useless at that point. You will have to open the schema file at the time of validating the XML.