JAXB提供了一種把Java object轉(zhuǎn)成XML，或者把XML轉(zhuǎn)成Java object的機制。
JAXB有兩個過程，一個是unmarshalling，另一個是marshalling。
unmarshalling：reading。從XML instance轉(zhuǎn)成Java content。
marshalling：writing。從Java content轉(zhuǎn)成XML instance。

注解的含義
@XmlRootElement 指定了XML document的root element。
@XmlAttribute 指定了root element的attribute。
@XmlElement 指定了root element的sub-element。

object to xml 相關(guān)代碼

  try {
            JAXBContext jContext = JAXBContext.newInstance(Student.class);
            Marshaller marshallObj = jContext.createMarshaller();
            marshallObj.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            Student student = new Student("abc", 123, "hadoop");
            marshallObj.marshal(student, new FileOutputStream("D:\\student.xml"));
        } catch(Exception e) {
            e.printStackTrace();
        }

xml to object 相關(guān)代碼

try {
            JAXBContext jContext = JAXBContext.newInstance(Student.class);
            Unmarshaller unmarshallerObj = jContext.createUnmarshaller();
            Student student = (Student) unmarshallerObj.unmarshal(JAXB_Demo.class.getClassLoader().getResourceAsStream("config/student.xml"));
            System.out.println(student.getName()+":"+student.getId()+":"+student.getSubject());
        } catch(Exception e) {
            e.printStackTrace();
        }

參考資料:http://www.itdecent.cn/p/6138d0a9709b