Conversion of Java object to XML

Overview: Before the transformation of XML and Java objects to understand less, today Learning interface API just contact, so write down, beginners hope everyone forgive ha.

1. Since it is a Java object and XML conversion, it is necessary to have a Java class to obtain the object, this example is mainly related to the boy class and the test run class

2. Code

2.1 Starting the first step of simple learning

@XmlRootElement

@XmlAccessorType (Xmlaccesstype.field)//field is just a field on a class, not a property

public class Boy {

String name = "xu**";

}

Public class Testxml {

public static void Main (String args[]) {

try {

Jaxbcontext Jaxbcontext = jaxbcontext.newinstance (Boy.class);

Marshaller Marshaller = Jaxbcontext.createmarshaller (); Convert an object to an XML format

Unmarshaller Unmarshaller = Jaxbcontext.createunmarshaller (); converting XML to Objects

Boy boy = new Boy ();

Marshaller.marshal (boy,system.out); //display in print output form

System.out.println ();

String xmlstr = "<boy><name> xu **</name></boy>";

Boy Towboy = (boy) Unmarshaller.unmarshal (new StringReader (XMLSTR));

System.out.println (Towboy.name);

} catch (Jaxbexception e) {

E.printstacktrace (); To change body of catch statement use File | Settings | File Templates.

}

}

}

The result of the printing is:

<?xml version= "1.0" encoding= "UTF-8" standalone= "yes"?><boy><name>xu**</name ></boy>

Xu * *

2.2 When boy turns down like this

@XmlRootElement

@XmlAccessorType (xmlaccesstype.property)//property is a property

Public class Boy {

String name = "xu**";

}

The result of the printing is:

<?xml version= "1.0" encoding= "UTF-8" standalone= "yes"?><boy/>

xu**

2.3 If you want to have 2.1 results, you need to provide a Get method of name to get the property

@XmlRootElement

@XmlAccessorType (Xmlaccesstype.property)

Public class Boy {

String name = "123";

Public String GetName () {

return name;

    }

Public void SetName (String name) {

this.name = name;

    }

}

2.4 can also be annotated by XmlElement

@XmlRootElement

@XmlAccessorType (Xmlaccesstype.property)

public class Boy {

String name = "123";

@XmlElement

Integer age = 10;

Public String GetName () {

return name;

}

public void SetName (String name) {

THIS.name = name;

}

}

The result of the printing is:

<?xml version= "1.0" encoding= "UTF-8" standalone= "yes"?><boy><age>10</age><name> 123</name></boy>

Xu * *

2.5 You can also change boy to tag and put it under a namespace

@XmlRootElement (name = "xu", namespace = "Http://test")

@XmlAccessorType (Xmlaccesstype.property)

Public class Boy {

@XmlElement

String name = "123";

@XmlElement

Integer age = ten;

}

Public class Testxml {

Public static void Main (String args[]) {

try {

Jaxbcontext jaxbcontext = jaxbcontext.newinstance (boy.class);

Marshaller Marshaller = Jaxbcontext.createmarshaller ();//Convert object to XML format

Unmarshaller Unmarshaller = Jaxbcontext.createunmarshaller ();//Convert XML to Object

Boy Boy = new Boy ();

Marshaller.marshal (boy,system.out);

System.out.println ();

String xmlstr = "<?xml version=\" 1.0\ "encoding=\" utf-8\ "standalone=\" yes\ "? ><ns2:Xu Xmlns:ns2=\ "http://test\" ><name> Xu **</name><age>25</age></ns2:xu> ";

Boy Towboy = (boy) Unmarshaller.unmarshal (new StringReader (XMLSTR));

System.out.println (towboy.name);

System.out.println (towboy.age);

} catch (Jaxbexception e) {

E.printstacktrace (); To change body of catch statement use File | Settings | File Templates.

          }

      }

}

The result of the printing is:

<?xml version= "1.0" encoding= "UTF-8" standalone= "yes"? ><ns2:Xu xmlns:ns2= "Http://test" > <name>123</name><age>10</age></ns2:xu>

Xu * *

-

2.6 @XmlJavaTypeAdaptor

@XmlRootElement (name = "Xu", namespace = "Http://test")

@XmlAccessorType (Xmlaccesstype.property)

Public class Boy {

@XmlElement

String name = "Xu * *";

@XmlElement

Integer age =;

private Testxmlinterface testxmlinterface;

}

We're going to write one more class. testxmlinterfaceadaptor is used to return a specific implementation class of testxmlinterface to the push

Interface Testxmlinterface cannot be converted when converting to XML, we have to add @XmlJavaTypeAdaptor (testxmlinterfaceadaptor.class)

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Conversion of Java object to XML