1.寫一個工具類：

public static String convertToXml(Object obj, String encoding) {  
        String result = null;  
        try {  
            JAXBContext context = JAXBContext.newInstance(obj.getClass());  
            Marshaller marshaller = context.createMarshaller();  
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);  
            StringWriter writer = new StringWriter();  
            marshaller.marshal(obj, writer);  
            result=writer.toString();
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return result;  
    }  
 

2.建立三個bean

    2.1.Student作為根節點，用到的註解如下:

   @XmlAccessorType(XmlAccessType.FIELD)  
   @XmlRootElement(name = "root")  
   @XmlType(propOrder = {})  
   public class Student {   
           @XmlElement(name="head")  
           private Head head;  
           @XmlElement(name = "body")  
           private Body body;  
 

      2.2Head、Body作為根節點的子節點

 @XmlAccessorType(XmlAccessType.FIELD)  
 @XmlType(propOrder = { "name", "desc" })  
 public class Body {  
          @XmlElement  
          private String name;  
          @XmlElement  
          private String desc; 

 3.測試一下：

        Student student = new Student();  
        Body body = new Body();
        Head head=new Head();
        head.setDesc("1");
        head.setName("111");
        body.setDesc("2");  
        body.setName("222");  
        student.setBody(body);
        student.setHead(head);
        String str = JaxbUtil.convertToXml(student,"GBK");
        System.out.println(str);
 

這樣基本實現javaBean轉成xml。

4.xml字串轉成javaBean,一個方法足以。

 public static T converyToJavaBean(String xml, Class c) {  
        T t = null;  
        try {  
            JAXBContext context = JAXBContext.newInstance(c);  
            Unmarshaller unmarshaller = context.createUnmarshaller();  
            t = (T) unmarshaller.unmarshal(new StringReader(xml));  
        } catch (Exception e) {  
            e.printStackTrace();  
        } 
        return t;  
    }