【IT168技术文档】 
    产生XML
    音乐公司销售它的音乐产品像乐器，唱片等，在它的地址薄中存储着两种类型的客户：个体和公司。每一个客户都有一个家庭地址和一系列的发货地址。发货地址可以是周末或早上有效，这些信息可以以标签的形式添加到地址薄中。其形式如下图所示：

    该公司想要以XML形式发送一些客户的信息给合作伙伴，因此它需要一个给定客户的对象模型的XML文档。使用JAXB实现起来很容易。下列代码创建了一个个体的实例并设置了他的属性（first name ，last name）一个家庭地址，两个发货地址。对象都设置好以后使用javax.xml.bind.Marshaller来产生个体对象的XML表示。 
    Listing 1: Creates an XML Representation of an Individual

// Instantiates Tag objects
Tag tag1 = new Tag("working hours");
Tag tag2 = new Tag("week-ends");
Tag tag3 = new Tag("mind the dog");

// Instantiates an individual object with home address
calendar.set(1940, 7, 7, 0, 0, 0);
Individual individual = new Individual(1L, "Ringo", "Starr", "+187445", 
      "ringo@star.co.uk", calendar.getTime());
individual.setHomeAddress(new Address(2L, "Abbey Road", "London", "SW14", "UK"));

// Instantiates a first delivery address
Address deliveryAddress1 = new Address(3L, "Findsbury Avenue", "London", "CE451", "UK");
deliveryAddress1.addTag(tag1);
deliveryAddress1.addTag(tag3);
individual.addDeliveryAddress(deliveryAddress1);

// Instantiates a second delivery address
Address deliveryAddress2 = new Address(4L, "Camden Street", "Brighton", "NW487", "UK");
deliveryAddress2.addTag(tag1);
deliveryAddress2.addTag(tag2);
individual.addDeliveryAddress(deliveryAddress2);

// Generates XML representation of an individual
StringWriter writer = new StringWriter();
JAXBContext context = JAXBContext.newInstance(Customer.class);
Marshaller m = context.createMarshaller();
m.marshal(individual, writer);

System.out.println(writer);

    这段代码使用静态方法newInstance来产生JAXBContext的一个实例。创建Marshaller对象，然后调用marshal方法产生一个个体对象的XML表示，即StringWinter。