java中的xml与实体类之间的映射

实体类:

 package xml;
 
 import javax.xml.bind.annotation.XmlRootElement;
 
 @XmlRootElement
 public class User {
     String name;
     String english_name;
     String age;
     String sex;
     String address;
     String description;
     public User(){}
 
     public User(String name, String english_name, String age, String sex,
             String address, String description) {
         this.name=name;
         this.english_name=english_name;
         this.age=age;
         this.sex=sex;
         this.address=address;
         this.description=description;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getEnglish_name() {
         return english_name;
     }
     public void setEnglish_name(String english_name) {
         this.english_name = english_name;
     }
     public String getAge() {
         return age;
     }
     public void setAge(String age) {
         this.age = age;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     public String getAddress() {
         return address;
     }
     public void setAddress(String address) {
         this.address = address;
     }
     public String getDescription() {
         return description;
     }
     public void setDescription(String description) {
         this.description = description;
     }
 
 }

一.java对象转化成xml文件

 package xml;
 
 import java.io.File;
 
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 
 /**
  * 将类映射成xml
  * @author Administrator
  *
  */
 public class Demo1 {
     public static void main(String[] args) {
         //创建xml对象,将他保存在指定位置
         File file = new File("D:\\javaItem\\xml\\src\\xml\\1.xml");
         //申明一个JAXBContext对象
         JAXBContext jaxbContext;
         try {
             //指定映射的类,创建JAXBContext对象的上下文
             jaxbContext = JAXBContext.newInstance(User.class);
             //创建转化对象Marshaller
             Marshaller m = jaxbContext.createMarshaller();
             //创建xml文件中的数据
             User user = new User("张三", "zhangsnan", "30", "男", "安徽合肥", "软件工程师");
             //将Java类中的User对象转化到XML
             m.marshal(user, file);
             System.out.println("转化完成");
         } catch (JAXBException e) {
             e.printStackTrace();
         }
     }
 }

二.xml文件转化为java对象

 package xml;
 
 import java.io.File;
 
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Unmarshaller;
 
 public class Demo2 {
     public static void main(String[] args) {
         File file=new File("D:\\javaItem\\xml\\src\\xml\\1.xml");
         JAXBContext jaxbContext;
         try {
             jaxbContext=JAXBContext.newInstance(User.class);
             Unmarshaller u=jaxbContext.createUnmarshaller();
             User user=(User)u.unmarshal(file);
             System.out.println("姓名:"+user.getName());
             System.out.println("英文名字:"+user.getEnglish_name());
             System.out.println("年龄:"+user.getAge());
             System.out.println("性别:"+user.getSex());
             System.out.println("地址:"+user.getAddress());
             System.out.println("描述:"+user.getDescription());
         } catch (JAXBException e) {
             e.printStackTrace();
         }
     }
 }