JAXB实现Object与XML转换

最新推荐文章于 2021-02-20 16:32:02 发布

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最新推荐文章于 2021-02-20 16:32:02 发布

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分类专栏： JAVA 文章标签： JAXB

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本文介绍了一个Java类（Customer类）与XML之间的相互转换方法。通过使用JAXB（Java Architecture for XML Binding）实现了从XML字符串到Java对象的解析及从Java对象到XML字符串的序列化。

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Customer类

@XmlRootElement(name = "type")
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;
	}
	
}

核心方法  JAXB

public class JAXB {


       /**
        * XML转Object
        * @param <T>
	* @param xmlStr
	* @param type
	* @return
	*/
	public static <T> T unmarshal(String xmlStr,Class<T> type){
		T customer = null;
		try {
			JAXBContext jaxbContext = JAXBContext.newInstance(type);
			Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
		    customer = (T) jaxbUnmarshaller.unmarshal(new StringReader(xmlStr));
			
		} catch (JAXBException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return customer;
	}
	
	/**
	* Object转XML
	* @param <T>
	* @param context
	* @param chart
	* @return
	* @throws JAXBException
	*/
	public static String marshal(Object obj,String encoding) {
		String strxml = null;
		try {
			JAXBContext context = JAXBContext.newInstance(obj.getClass());
			Marshaller marshaller = context.createMarshaller();  
	           marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);  
	           marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);  
	  	   StringWriter writer = new StringWriter();  
	           marshaller.marshal(obj, writer);  
	           strxml = writer.toString();  
		   } catch (JAXBException e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
		}
	return strxml; 
    }	
}

测试方法  JAXBTest

public class JAXBTest {
	public static void main(String args[]){
	//xml转object
	/*String xmlStr = "<?xml version=\"1.0\" encoding=\"gbk\" standalone=\"yes\"?><customer id=\"100\"><age>29</age><name>mkyong</name><sex>男</sex></customer>";
	JAXB j = new JAXB();
	Customer customer = j.unmarshal(xmlStr, Customer.class);
	System.out.println(customer.name +" ; "+ customer.id +" ; "+ customer.age);*/
	//object转xml
	Customer customer = new Customer();
	customer.setId(100);
	customer.setName("mkyong");
	customer.setAge(29);
	JAXB j = new JAXB();
	String xml = j.marshal(customer,"UTF-8");
	System.out.println(xml); 
        }
}