JAXB是将JAVA对象序列化为XML,XML反序列化为JAVA对象的好东西,在JDK 1.6中,
已经自带了,不用另外再下载包,如果是小于1.6,则需要到这里下载(http://jaxb.java.net/),本文复习下简单的JAXB.

1 一个POJO对象,将set方法用annotation打上注释即可
  

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Customer {

String name;
int age;
int id;

public String getName() {
return name;
}

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

public int getAge() {
return age;
}

@XmlElement
public void setAge(int age) {
this.age = age;
}

public int getId() {
return id;
}

@XmlAttribute
public void setId(int id) {
this.id = id;
}




2 序列化程序


   

import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;

public class JAXBExample {
public static void main(String[] args) {

Customer customer = new Customer();
customer.setId(100);
customer.setName("mkyong");
customer.setAge(29);

try {

File file = new File("C:\\file.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

// output pretty printed
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

jaxbMarshaller.marshal(customer, file);
jaxbMarshaller.marshal(customer, System.out);

} catch (JAXBException e) {
e.printStackTrace();
}

}

输出:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<customer id="100">
<age>29</age>
<name>mkyong</name>
</customer>

3 反过来序列化


import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

public class JAXBExample {
public static void main(String[] args) {

try {

File file = new File("C:\\file.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);

Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
Customer customer = (Customer) jaxbUnmarshaller.unmarshal(file);
System.out.println(customer);

} catch (JAXBException e) {
e.printStackTrace();
}

}
}