JAXB学习笔记(六)

上节中所说的最终xml格式，

 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persion>
    <filed name="userid">112</filed>
    <filed name="username">就不告诉你</filed>
    <filed name="birthday">2011-09-28</filed>
</persion>

 
 聪明的读者应该自己就会实现了，通过集合+属性值的方式就ok了，看代码

package cn.uyunsky.blog.xml.demo6;

import java.io.StringReader;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * <p>属性+集合 实现非正常思维的xml</p>
 */
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Persion {

	@XmlElement(name = "filed")
	private List<DemoField> infos;

	public List<DemoField> getInfos() {
		return infos;
	}

	public void setInfos(List<DemoField> infos) {
		this.infos = infos;
	}

	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("Persion [infos=");
		builder.append(infos);
		builder.append("]");
		return builder.toString();
	}

	public static void main(String[] args) {
		try {
			JAXBContext jaxbContext = JAXBContext.newInstance(Persion.class);
			Persion persion = new Persion();

			List<DemoField> infos = new ArrayList<DemoField>();

			DemoField userid = new DemoField();
			userid.setName("userid");
			userid.setValue("112");
			infos.add(userid);

			DemoField username = new DemoField();
			username.setName("username");
			username.setValue("就不告诉你");
			infos.add(username);

			DemoField birthday = new DemoField();
			birthday.setName("birthday");
			birthday.setValue(new SimpleDateFormat("yyyy-MM-dd").format(new Date()));
			infos.add(birthday);

			persion.setInfos(infos);

			Marshaller marshaller = jaxbContext.createMarshaller();
			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

			StringWriter writer = new StringWriter();
			marshaller.marshal(persion, writer);
			String xml = writer.getBuffer().toString();
			System.out.println(xml);

			Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
			Object bean = unmarshaller.unmarshal(new StringReader(xml));
			System.out.println(bean);

		} catch (JAXBException e) {
			e.printStackTrace();
		}
	}

}

 
DemoField对象

package cn.uyunsky.blog.xml.demo6;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlValue;

@XmlAccessorType(XmlAccessType.FIELD)
public class DemoField {

	@XmlAttribute
	private String name;

	@XmlValue
	private String value;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getValue() {
		return value;
	}

	public void setValue(String value) {
		this.value = value;
	}

	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("DemoField [name=");
		builder.append(name);
		builder.append(", value=");
		builder.append(value);
		builder.append("]");
		return builder.toString();
	}
}

 
教程到此告一段落，读者们可自己研究javax.xml.bind.annotation包下的注释，实现更多的功能