使用jaxb操作Java与xml之间的转换非常简单，看个例子就明白了。

    //javaBean-->xml

    @Test

    public void test1() {

        try {

            JAXBContext jaxbContext = JAXBContext.newInstance(User.class);

            Marshaller marshaller = jaxbContext.createMarshaller();

            User user1 = new User("张三", "zhangsan", 123);

            marshaller.marshal(user1, System.out);

        } catch (JAXBException e) {

            e.printStackTrace();

        }

    }

    //xml-->javaBean

    @Test

    public void test2() {

        try {

            String xml = "<user><money>123</money>"

                    + "<password>zhangsan</password><username>张三</username>"

                    + "</user>";

            JAXBContext jaxbContext = JAXBContext.newInstance(User.class);

            Unmarshaller um = jaxbContext.createUnmarshaller();

            User user = (User) um.unmarshal(new StringReader(xml));

            System.out.println(user.getUsername() + "," + user.getMoney());

        } catch (JAXBException e) {

            e.printStackTrace();

        }

    }