JAXB 面试题与答案

Question: Java code for marshalling Java objects into XML.

Answer: • Example
Marshaller m = factory.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
Writer fw = new FileWriter("newCars.xml");
m.marshal(cars, fw);
• marshal method accepts
– java.io.OutputStream
– java.io.Writer
– javax.xml.transform.Result
• related to XSLT
– org.w3c.dom.Node
• related to DOM
– org.xml.sax.ContentHandler
• related to SAX

• Other Marshaller methods
– boolean setEventHandler(ValidationEventHandler handler)
• same as use with Unmarshaller, but validation events
are delivered during marshalling
– void setProperty(String name, Object value)
• supported properties are
– jaxb.encoding - value is a String
» the encoding to use when marshalling; defaults to “UTF-8”
– jaxb.formatted.output - value is a Boolean
» true to output line breaks and indentation; false to omit (the default)
– jaxb.schemaLocation - value is a String
» to specify xsi:schemaLocation attribute in generated XML
– jaxb.noNamespaceSchemaLocation - value is a String
» to specify xsi:noNamespaceSchemaLocation attribute in generated XML