简单的jaxb例子

有两个实体对象“意见”和“回复”，它们之间是一对多的关系

 

@XmlAccessorType(XmlAccessType.FIELD)
public class Advice {

    @XmlAttribute
    protected String filename;
    public String getFilename() {
		return filename;
	}
	public void setFilename(String filename) {
		this.filename = filename;
	}
	public String getFilepath() {
		return filepath;
	}
	public void setFilepath(String filepath) {
		this.filepath = filepath;
	}
	public String getContent() {
		return content;
	}
	public void setContent(String content) {
		this.content = content;
	}
	public void setReplies(List<Reply> replies) {
		this.replies = replies;
	}
	public List<Reply> getReplies() {
		return replies;
	}
	@XmlElement
    protected String filepath;
	
	@XmlElement
    protected String content;
	
	@XmlElementWrapper(name="replies")
	  @XmlElement(name = "value")
	private List<Reply> replies ;	
}

 

 

@XmlAccessorType(XmlAccessType.FIELD)

public class Reply {
	@XmlAttribute
	private String content;
	@XmlAttribute
	private int status;

	public void setContent(String content) {
		this.content = content;
	}

	public String getContent() {
		return content;
	}

	public void setStatus(int status) {
		this.status = status;
	}

	public int getStatus() {
		return status;
	}

}

 

 

	public static void main(String[] args) throws JAXBException, FileNotFoundException {
		
		
		JAXBContext jc = JAXBContext.newInstance("Advice");
		
		
		Advice a= new Advice();
		a.setFilename("aaa.java");
		a.setFilepath("c:\\");
		a.setContent("content");
		
		Reply reply1 = new Reply();
		reply1.setContent("xxx");
		reply1.setStatus(0);
		Reply reply2 = new Reply();
		reply2.setContent("yyyy");
		reply2.setStatus(1);
		
		List<Reply> replies = new ArrayList<Reply>();
		replies.add(reply1);
		replies.add(reply2);

		a.setReplies(replies);
		
		
		
		
		JAXBElement usersE = new JAXBElement<Advice>(new QName("", "advice"), Advice.class, null, a);

		Marshaller marshaller = jc.createMarshaller();

		marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

		marshaller.marshal( usersE,new FileOutputStream("c:\\test.xml"));

	}

 

输出

  <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> 
- <advice filename="aaa.java">
  <filepath>c:\</filepath> 
  <content>content</content> 
- <replies>
  <value status="0" content="xxx" /> 
  <value status="1" content="yyyy" /> 
  </replies>
  </advice>