JAXB(Java Architecture for XML Binding)

marshal（Java对象转化成XML）

import javax.xml.bind.annotation.XmlRootElement;

//指定根元素，其他属性默认为根元素的子元素
@XmlRootElement(name="article")
public class Article{
      private String title;
      private String author;
      private String email;
      private String date;
//省略setter和getter方法
}

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
public static void main(String [] args){
      File xmlFile = new File("E:\\test.xml");
      JAXBContext context ;  //声明JAXBContext上下文对象
      try{ //通过指定的类创建上下文对象
             context= JAXBContext.newInstance(Article.class);
             Marshaller marshaller =context.createMarshaller();

             Article article = new Article();
             article.setAuthor("Jerry");
             article.setDate("2014-9-21");
             article.setEmail("[email protected]");
             article.setTitle("XML概述");
             //将Java对象转换成xml文件
             marshaller.marshal(article,xmlFile);
      }catch(JAXBException e){
             e.printStackTrace();
      }
}

unmarshal（XML对象转化成Java对象）

unmarshal是marshal的逆操作，与之类似

context =JAXBContext.newInstance(Article.class);
Unmarshal unmarshaller = context.createUnmarshaller();
Article article= (Article)unmarshaller.unmarshal(xmlFile);

如xml文件有多个元素，可以创建一个新的Java对象，用List存储子元素

@XmlRootElement
public class Articles{
      List<Article> articles = newArrayList<Article>;
      ……
}