映射自定义对象所需的JAXB帮助

Question

I have XML receiving from some server. I need to unmarshall that xml to java objects and marshall java objects to xml.

How Can i do that?.

Below is my XML format.

<parent>
    <child>
        <order>
            <row no="1">
                <AB val="ID">205</AB>
                <AB val="NAME">JS</AB>
                <AB val="DETAILS">
                    <prod no="1">
                        <AB val="PRODID">205</AB>
                        <AB val="NAME">Prod1</AB>
                    </prod>
                    <prod no="2">
                        <AB val="PRODID">206</AB>
                        <AB val="NAME">Prod2</AB>
                    </prod>
                </AB>
            </row>
        </order>
    </child>
</parent>

Answer 1

You can use jaxb2-maven-plugin with xjc goal to generate your java classes from xml schema (xsd) during build (you can generate xml schema from xml by any online generator, for example use this ).

You can also just use xjc from console and generate your classes beforehand, it's built in into java (see <your jdk path>/bin/xjc.exe ).

Then simply use marshaller/unmarshaller, to do the work, for example:

JAXBContext jaxbContext = JAXBContext.newInstance(YourClazz.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
YourClazz yourclazz = (YourClazz) jaxbUnmarshaller.unmarshall(new File("path/to/your/xml"));

btw I suggest caching JAXBContext instances, use Map<Class<?>, JAXBContext> . Do not cache marshaller/unmarshaller tho.