用于实体解析的Catalog.xml文件的XMLSchema验证

Question

我有一个schema.xsd包含和修改xhtml像这样:

<xs:redefine schemaLocation="http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
...
</xs:redefine>

现在我写了一个Validator,其中

• 从xml文件中读取模式
• 使用CatalogManager来解析实体

它工作正常,因为它不从网络加载任何文件,而是找到我的catalog.xml文件中给出的xhtml11.xsd .

public class XmlTemplateValidator implements TemplateValidator
{
    public List<SAXParseException> validate ( String xml ) throws Exception
    {
        Reader input = new StringReader(xml);
        InputSource inputSource = new InputSource(input);

        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setNamespaceAware(true);
        factory.setValidating(true);
        SAXParser parser = factory.newSAXParser();
        parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaLanguage", "http://www.w3.org/2001/XMLSchema");
        XMLReader reader = parser.getXMLReader();
        reader.setEntityResolver(new CatalogResolver());
        DefaultErrorHandler handler = new DefaultErrorHandler();
        reader.setErrorHandler(handler);
        reader.parse(inputSource);
        return handler.getSaxParseExceptions();
    }

}

现在我想要完全相同的东西,但我想在我的验证器中给出架构(所以不要让作者说它应该验证哪个架构,而是让验证器决定使用哪个架构.

public class NewXmlTemplateValidator implements TemplateValidator
{
    static final String schemaSource    = "schema.xsd";

    public List<SAXParseException> validate ( String xml ) throws Exception
    {
        Reader input = new StringReader(xml);
        SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        URL schemaUrl = getClass().getResource(schemaSource);
        Schema schema = factory.newSchema(schemaUrl);
        Validator validator = schema.newValidator();
        DefaultErrorHandler handler = new DefaultErrorHandler();
        validator.setErrorHandler(handler);
        Source source = new StreamSource(input);
        validator.validate(source);
        return handler.getSaxParseExceptions();
    }
}

它的工作原理,但它确实从网络加载所有xhtml文件,这需要相当长的时间,而不是我想要的.

所以我想根据预定义的模式验证XML String,并通过catalog.xml定义进行适当的实体解析.

如何轻松地将CatalogResolver添加到第二个设置？

Answer 1

在第二个示例中添加XMLCatalogResolver,如下所示:

SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
URL schemaUrl = getClass().getResource(schemaSource);
String catalog = getClass().getResource("/catalog.xml").getFile();
XMLCatalogResolver resolver = new XMLCatalogResolver(new String[] { catalog });
factory.setResourceResolver(resolver);