JAXB学习笔记(五)

上个例子中生成的xml

 

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

 

 人说这都"什嘛",可能我们真正需要的是这样子的，即节点名字叫"field"

 

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

 

OK,有需求咱们就要解决，当然处理这个之前我们先要知道集合的序列化，因为明显我们看出field节点是一组数组集合。上代码

 

package cn.uyunsky.blog.xml.demo5;

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.XmlRootElement;

/**
 * <p>集合试验</p>
 */
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Persion {

	private List<String> infos;

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

	public void setInfos(List<String> 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<String> infos = new ArrayList<String>();
			infos.add("112");
			infos.add("就不告诉你");
			infos.add(new SimpleDateFormat("yyyy-MM-dd").format(new Date()));

			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();
		}
	}

}

 

输出结果

 

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

Persion [infos=[112, 就不告诉你, 2011-09-28]]

 好了，下一节我们最后看看本节开头提到的xml格式怎么实现