jaxb: I use different method but all doesn't work - web-services

Question

I want to output a XML like this:
<master>
<list type="array" nil="true">
<master>
I have tried #XmlAttribute and #XmlElement(nil=true), how should do this with jaxb.
<slave-status><connect-retry type="integer" nil="true"/>
<created_at type="datetime" nil="true"/>
<slave-status>

Answer 1

Master.java
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
#XmlRootElement
#XmlAccessorType(XmlAccessType.FIELD)
#XmlType(name = "master", propOrder = {
"list"
})
public class Master {
#XmlElement(name = "list")
protected List list;
public List getList() {
return list;
}
public void setList(List value) {
this.list = value;
}
}
List.java
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;
#XmlAccessorType(XmlAccessType.FIELD)
#XmlType(name = "list")
public class List {
#XmlAttribute(name = "type")
protected String type;
#XmlAttribute(name = "nil")
protected boolean nil;
public boolean isNil() {
return nil;
}
public void setNil(boolean nil) {
this.nil = nil;
}
public String getType() {
return type;
}
public void setType(String value) {
this.type = value;
}
}
package-info.java
#javax.xml.bind.annotation.XmlSchema(namespace = "", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.ca.exporter.util;
Main.java
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
public class Main {
public static void main(String[] args) throws JAXBException {
JAXBContext jc = JAXBContext.newInstance(Master.class);
Master m = new Master();
List l = new List();
l.setType("array");
l.setNil(true);
m.setList(l);
Marshaller mar = jc.createMarshaller();
mar.marshal(m, System.out);
}
}
Output - XML
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<master>
<list type="array" nil="true"/>
</master>