java通过注解将对象转换为xml

最新推荐文章于 2024-04-18 17:52:08 发布

原创最新推荐文章于 2024-04-18 17:52:08 发布 · 1.6k 阅读

0 ·

CC 4.0 BY-SA版权

XML 专栏收录该内容

7 篇文章

订阅专栏

这篇博客展示了如何在Java中使用JAXB库将一个对象转换为XML格式的字符串。通过创建`XmlChangeUtil`工具类，实现了`objectToXml`方法，利用JAXBContext实例化并创建marshaller，然后将对象转换成XML输出。示例中，创建了一个`Person`对象，并将其转换为XML，输出结果包括年龄、姓名和性别。

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

@XmlRootElement(name="Person")
public class Person {

   private String name;
   private String sex;
   private int age;

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

   @XmlAttribute(name="sex")
   public String getSex() {
       return sex;
   }
   public void setSex(String sex) {
       this.sex = sex;
   }

   @XmlElement(name="age")
   public int getAge() {
       return age;
   }
   public void setAge(int age) {
       this.age = age;
   }


}

测试类：

public class Test4 {

   public static void main(String[] args) throws Exception{
       XmlChangeUtil<Person> util=new XmlChangeUtil<Person>();


       Person person=new Person();
       person.setAge(18);
       person.setName("zhaonan");
       person.setSex("女");

       String objectToXml = util.objectToXml(person);

       System.out.println(objectToXml);
   }
}

工具类：

public class XmlChangeUtil<T> {

   /**
   *将对象转换为xml
   * @param className
   * @return
   * @throws Exception
   */
   public String objectToXml(T className) throws Exception {

       try {
           JAXBContext context = JAXBContext.newInstance(className.getClass());
           Marshaller mar = context.createMarshaller();
           mar.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
           mar.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");

           StringWriter writer = new StringWriter();

           mar.marshal(className, writer);

           return writer.toString();

       } catch (Exception e) {

           e.printStackTrace();

           throw new Exception();
       }
   }

   /**
   * 将xml转换为对象
   * @param className
   * @param xml
   * @return
   * @throws Exception
   */
   @SuppressWarnings({ "unchecked"})
   public T xmlToObject(T className, String xml) throws Exception {

       try {

           JAXBContext jc = JAXBContext.newInstance(className.getClass());
           Unmarshaller u = jc.createUnmarshaller();

           StringReader reader=new StringReader(xml);

           return (T)u.unmarshal(reader);

       } catch (Exception e) {
           e.printStackTrace();
           throw new Exception();
       }

   }
}

生成的xml：