Xml转化为Java,Java转化为Xml[JAXB]

JAXB:这是java处理xml的标准.
说明

• 使用了JAXBContext.createUnmarshaller()转化xml到Java类，这里可以指定命名空间.
• 使用了JAXBContext.createMarshaller()转化Java类到xml,这里可以指定命名空间.
• 设置JAXBContext.createMarshaller()输出xml的相当属性，格式化，编码，包含头信息，设置命名空间.重命令根元素.

package org.frame.base.xml.jdk.bk;

import java.io.StringReader;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.namespace.QName;

import org.frame.base.xml.jdk.Contact;
import org.xml.sax.InputSource;

public class XmlToJava {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.setProperty("jaxp.debug", "1");
		JAXBContext wgProviderContext;
		try {
			wgProviderContext = JAXBContext.newInstance(Contact.class);
			Unmarshaller unmarshaller = wgProviderContext.createUnmarshaller(); 
			Marshaller marshaller = wgProviderContext.createMarshaller(); 
			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
			marshaller.setProperty(Marshaller.JAXB_ENCODING, "GB2312");
			marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false);// 是否包含头信息
			marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION,"http://www.ycl.com/schema/schema  http://www.ycl.com/schema/schema.xsd");
			// just set format with xml

			// 把xml转为Java对象
			Contact contact = (Contact) unmarshaller
					.unmarshal(getInputSource());
			System.out.println(contact);

			System.out.println("反序列化对象到xml内容如下:");
			JAXBElement<Contact> jaxbElement = new JAXBElement<Contact>(
					new QName(null, "contact"), Contact.class, contact);
			// 这里可以改写根元素.
			marshaller.marshal(jaxbElement, System.out);
			// 表现不错啊 
		} catch (JAXBException ex) {
			ex.printStackTrace();
		}
	}
	
	private static InputSource getInputSource() {
		StringBuffer xml = new StringBuffer(
				"<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
		xml.append("<contact xmlns=\"http://www.ycl.com/schema/schema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.ycl.com/schema/schema  http://www.ycl.com/schema/schema.xsd\" >");

		xml.append("<item width=\"10\">");
		xml.append("<uic>1</uic>");
		xml.append("<fullName>ycl1</fullName>");
		xml.append("<sex>a</sex>");
		xml.append("</item>");

		xml.append("<item width=\"11\">");
		xml.append("<uic>2</uic>");
		xml.append("<fullName>ycl2</fullName>");
		xml.append("<sex>b</sex>");
		xml.append("</item>");

		xml.append("</contact>");

		InputSource is = new InputSource(new StringReader(xml.toString()));
		return is;
	} 
}

package org.frame.base.xml.jdk;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
  
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {"items"})
@XmlRootElement(name ="contact",namespace="http://www.ycl.com/schema/schema") 
public class Contact {

	@XmlElement(name = "item",namespace="http://www.ycl.com/schema/schema")
	private List<Item> items;

	public Contact() {
		items = new ArrayList<Item>();
	}

	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return items.toString();
	}

}

package org.frame.base.xml.jdk;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlTransient;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.XmlAccessorType; 
 
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(propOrder={"fullName","uic","sex"},namespace="http://www.ycl.com/schema/schema")
public class Item {
 
	@XmlElement(name="uic",namespace="http://www.ycl.com/schema/schema")
	private String uic;
	  
	@XmlElement(name="fullName",namespace="http://www.ycl.com/schema/schema")
	private String fullName;
	
	@XmlAttribute(name="width")
	private String width; 
	 
	@XmlElement(name="sex",namespace="http://www.ycl.com/schema/schema")
	private String sex;
	
	public String getSex() {
		return sex;
	}

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

	public String getWidth() {
		return width;
	} 
	
	public void setWidth(String width) {
		this.width = width;
	}
	   
	public String getUic() {
		return uic;
	}
	public void setUic(String uic) {
		this.uic = uic;
	} 
	
	public String getFullName() {
		return fullName;
	}
	public void setFullName(String fullName) {
		this.fullName = fullName;
	}
	
	@Override
	public String toString(){
		return "width:"+width+",uic:"+uic+",fullName:"+fullName+",sex:"+sex;
	}
}

测试用例输出结果如下:

[width:10,uic:1,fullName:ycl1,sex:a, width:11,uic:2,fullName:ycl2,sex:b]
反序列化对象到xml内容如下:
<?xml version="1.0" encoding="GB2312" standalone="yes"?>
<contact xsi:schemaLocation="http://www.ycl.com/schema/schema  http://www.ycl.com/schema/schema.xsd" xmlns:ns3="http://www.ycl.com/schema/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <ns3:item width="10">
        <ns3:fullName>ycl1</ns3:fullName>
        <ns3:uic>1</ns3:uic>
        <ns3:sex>a</ns3:sex>
    </ns3:item>
    <ns3:item width="11">
        <ns3:fullName>ycl2</ns3:fullName>
        <ns3:uic>2</ns3:uic>
        <ns3:sex>b</ns3:sex>
    </ns3:item>
</contact>