Validating XML files with XSD

XSD file (XML Schema language is also called XML Schema Definition (XSD). For specific usage and definitions, please refer to:

http://www.w3school.com.cn/schema/index.asp



java from jdk1.5 The new SchemaFactory class above can support XSD verification, and it is very convenient to use.

The following code can be used in JDK1.5+ to verify xml

[java] view plaincopy
public class SimpleErrorHandler implements ErrorHandler { 
    public void warning(SAXParseException e) throws SAXException { 
        System.out.println(e.getMessage()); 
    } 
 
    public void error(SAXParseException e) throws SAXException { 
        System.out.println(e.getMessage()); 
    } 
 
    public void fatalError(SAXParseException e) throws SAXException { 
        System .out.println(e.getMessage()); 
    } 
} 
 
 
SAXParserFactory factory = SAXParserFactory.newInstance(); 
 
SchemaFactory schemaFactory =  
    SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema"); 
 
factory.setSchema(schemaFactory.newSchema( 
    new Source[] {new StreamSource( "contacts.xsd")})); 
 
SAXParser parser = factory.newSAXParser(); 
 
SAXReader reader = new SAXReader(parser.getXMLReader()); 
reader.setValidation(false); 
reader.setErrorHandler(new SimpleErrorHandler()); 
reader .read("contacts.xml"); For 


details, please refer to: http://www.edankert.com/validate.html



XSD support is not provided before JDK1.5, because there are many XML APIs before JDK1.5 DOM4j + ​​xerces can be used all over the sky If you use XPATH to read XML nodes, you need saxpath.jar



JDK1.4+DOM4J+xerces to verify the xml file



[c-sharp] view plaincopy
public class ParserErrorHandler implements ErrorHandler { 
   private static final Logger logger = Logger.getLogger(ParserErrorHandler.class); 
    public void error(SAXParseException e) throws SAXException { 
         
        //logger.error(e); 
        throw e; 
 
    } 
 
    public void fatalError(SAXParseException e) throws SAXException { 
        //logger.error(e); 
        throw e; 
 
    } 
 
    public void warning(SAXParseException e) throws SAXException { 
        //logger.error(e); 
        throw e; 
 
    } 
 
} 
-- After defining SAXReader, it will run abnormally if it reads the xml file if it does not conform to the XSD rules 
 
SAXReader reader = new SAXReader(); 
          
        reader.setValidation(true); 
        reader.setFeature("http://xml.org/sax/features/validation", true); 
        reader.setFeature("http://apache.org/xml/features/validation/schema", 
                true); 
        reader 
                .setProperty( 
                        "http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation", 
                        “xxx.XSD"); 
        reader.setErrorHandler(new ParserErrorHandler());