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1.将 xml 文件中的各个节点和属性信息创建对应的Java模型。2.在Java模型中的创建与 xml 文件对应的节点和属性需要用注解来表示。
@XmlRootElement 将一个Java类映射为一段XML的根节点
@XmlAccessorType 定义映射这个类中的何种类型需要映射到XML。可接收四个参数，分别是：
XmlAccessType.PROPERTY：映射这个类中的属性（get/set方法）到XML</items>
3.废话不多说了，我们直接上一个非常简单的例子程序。
3.1两个基本的POJO类。
package com.npf.jaxb;
public class Classroom {
private int id;
private String name;
}package com.npf.jaxb;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Student {
private int id;
private String name;
private int age;
private Classroom room;}
3.2测试方法
package com.npf.jaxb;
import java.io.StringReader;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import org.junit.Test;
public class JAXBTest {
@Test
public void object2xml() throws JAXBException{
JAXBContext jaxbContext = JAXBContext.newInstance(Student.class);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
Student student = new Student(1, "zhangsan",1,new Classroom(1,"computer"));
marshaller.marshal(student, System.out);
}
@Test
public void xml2object() throws JAXBException{
JAXBContext jaxbContext = JAXBContext.newInstance(Student.class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>"
+ "<student><age>1</age><id>1</id><name>zhangsan</name><room><id>1</id>"
+ "<name>computer</name></room></student>";
Student student = (Student) unmarshaller.unmarshal(new StringReader(xml));
System.out.println(student.getName()+","+student.getRoom().getName());
}
}
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原文地址：http://blog.csdn.net/pfnie/article/details/51344324
