一定義一個實體類

package lucence;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Book {
	private String name;
	private String sex;
	private String aa;
	public String getName() {
		return name;
	}
	
	public Book(){
		
	}
	public Book(String name, String sex, String aa) {
		super();
		this.name = name;
		this.sex = sex;
		this.aa = aa;
	}
	@Override
	public String toString() {
		return "Book [name=" + name + ", sex=" + sex + ", aa=" + aa + "]";
	}

	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public String getAa() {
		return aa;
	}
	public void setAa(String aa) {
		this.aa = aa;
	}
}
 

記得加上@XmlRootElement的註解

package lucence;

import java.io.StringReader;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class TestMain {
		   public static void main(String[] args) throws JAXBException {
			   Book b=new Book("fsdadf","dfs","fdsa");
			   //物件轉化成xml
			   changeObjToXml(b);
			   //<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><book><aa>fdsa</aa><name>fsdadf</name><sex>dfs</sex></book>
			   
			   //xml轉化成物件
			   String xml="<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><book><aa>fdsa</aa><name>fsdadf</name><sex>dfs</sex></book>";
			   changXmlToObj(xml);
			   //Book [name=fsdadf, sex=dfs, aa=fdsa]
		   }
		
		private static void changXmlToObj(String xml) throws JAXBException {
			// TODO Auto-generated method stub
			JAXBContext context=JAXBContext.newInstance(Book.class);
			Unmarshaller createUnmarshaller = context.createUnmarshaller();
			Book unmarshal = (Book) createUnmarshaller.unmarshal(new StringReader(xml));
			System.out.println(unmarshal.toString());
		}
			//Book [name=fsdadf, sex=dfs, aa=fdsa]
		
		private static Book changeObjToXml(Book b) throws JAXBException {
			JAXBContext jaxbContext=JAXBContext.newInstance(Book.class);
			   Marshaller createMarshaller = jaxbContext.createMarshaller();
			   createMarshaller.marshal(b, System.out);
			return b;
		}
}