JAXB解析xml

JAXB解析xml

分类： JavaSE 2011-06-04 22:46  325人阅读  评论(1)  收藏  举报

 大家知道xml常用的解析方式有DOM, SAX, StAX三种.如果使用这几种中的一种解析, 显然还是比较麻烦的.
 可以使用JAXB(Java Architecture for XML Binding)
 Person
 public class Person implements Serializable {
     private String name;

     private Integer age;

     private char sex;

     public Person() {
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public Integer getAge() {
         return age;
     }

     public void setAge(Integer age) {
         this.age = age;
     }

     public char getSex() {
         return sex;
     }

     public void setSex(char sex) {
         this.sex = sex;
     }

 }

 @XmlRootElement(name = "persons")
 public class Persons extends ArrayList<Person> { // 泛化, 聚合

     @XmlElement(name = "person")
     public List<Person> getPersons() {
         return this;
     }
 }

 写xml
 public static void main(String[] args) {
         try {
             // javax.xml.bind.JAXBException: class com.fjh658.pojo.Persons nor
             // any of its super class is known to this context.
             JAXBContext cxt = JAXBContext.newInstance(Persons.class);
             Marshaller marshaller = cxt.createMarshaller();

             Persons persons = new Persons();
             for (int i = 0; i < 50; i++) {
                 Person p = new Person();
                 p.setName("zhangsan" + i);
                 p.setAge(20 + i);
                 p.setSex('1');

                 persons.add(p);
             }
             marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");// 编码格式
             marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);// 是否格式化生成的xml串
             marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false);// 默认false表示xml指令存在

             // marshaller.marshal(persons, System.out);
             marshaller.marshal(persons, new File("./test.xml"));
         } catch (JAXBException e) {
             e.printStackTrace();
         }

     }

 读xml
 public class ReadTest {

     public static void main(String[] args) {
         try {
             JAXBContext cxt = JAXBContext.newInstance(Persons.class);
             Unmarshaller unmarshaller = cxt.createUnmarshaller();
             List<Person> persons = (List<Person>) unmarshaller.unmarshal(new File("./test.xml"));

             if (persons != null) {
                 for (Person p : persons) {
                     if (p != null) {
                         System.out.println(p.getName());
                     }
                 }
             }
         } catch (JAXBException e) {
             e.printStackTrace();
         }

     }
 }