XStream xml 2 objectとobject 2 xml

まずxstream-distribution-1.4.4-binのjarをコンパイルと実行環境に追加します.
次にpojoクラスを定義します.implements javaは必要ありません.io.Serializable

public class SexyWoman {
	private String name;
	private long high;
	private long weight;
	public static String face="pretty";
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public long getHigh() {
		return high;
	}
	public void setHigh(long high) {
		this.high = high;
	}
	public long getWeight() {
		return weight;
	}
	public void setWeight(long weight) {
		this.weight = weight;
	}
	
}

次に、実行テストクラスを書きます.

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
public class XStreamTest {
	public static void main(String[] args) {
		SexyWoman sw1=new SexyWoman();
		sw1.setName("maggie");
		sw1.setHigh(172);
		sw1.setWeight(65);
		sw1.face="ddd";
		String xmlContent=doPojo2Xml(sw1);
		System.out.println(xmlContent);
		System.out.println("


");
		SexyWoman sw2=new SexyWoman();
		Object obj=doXml2Pojo(xmlContent,sw2);
		System.out.println(((SexyWoman)obj).getName());
	}

	public static String doPojo2Xml(Object obj){
		XStream xstream=new XStream(new DomDriver());
		xstream.alias(obj.getClass().getSimpleName(), obj.getClass());
		String xmlContent=xstream.toXML(obj);
		return xmlContent;
	}
	
	public static Object doXml2Pojo(String xmlContent,Object obj){
		XStream xstream=new XStream(new DomDriver());
		xstream.alias(obj.getClass().getSimpleName(), obj.getClass());
		Object getObj=xstream.fromXML(xmlContent);
		return getObj;
	}
}

最後の出力

<SexyWoman>
  <name>maggie</name>
  <high>172</high>
  <weight>65</weight>
</SexyWoman>




maggie

ここでstaticプロパティはxmlに入っていないことがわかります.
ここで注意しなければならないのはStringの最大長さが65 xxxなので、あまり大きなクラスとxmlを使うことはできません.そうでないと問題が発生します.もちろんXstreamオープンソースには、このような問題に特化したapiがあります.
もし私たちが彼女に車を追加したら?

public class Car implements java.io.Serializable{
	private String cardName;

	public String getCardName() {
		return cardName;
	}

	public void setCardName(String cardName) {
		this.cardName = cardName;
	}
}
public class XStreamTest {
	public static void main(String[] args) {
		SexyWoman sw1=new SexyWoman();
		sw1.setName("maggie");
		sw1.setHigh(172);
		sw1.setWeight(65);
		sw1.face="ddd";
		Car car1=new Car();
		car1.setCardName("ppo");
		sw1.setCar(car1);
		String xmlContent=doPojo2Xml(sw1);
		System.out.println(xmlContent);
		System.out.println("


");
		SexyWoman sw2=new SexyWoman();
		Object obj=doXml2Pojo(xmlContent,sw2);
		System.out.println(((SexyWoman)obj).getName());
	}

	public static String doPojo2Xml(Object obj){
		XStream xstream=new XStream(new DomDriver());
		xstream.alias(obj.getClass().getSimpleName(), obj.getClass());
		String xmlContent=xstream.toXML(obj);
		return xmlContent;
	}
	
	public static Object doXml2Pojo(String xmlContent,Object obj){
		XStream xstream=new XStream(new DomDriver());
		xstream.alias(obj.getClass().getSimpleName(), obj.getClass());
		Object getObj=xstream.fromXML(xmlContent);
		return getObj;
	}
}

では出力します

  maggie
  172
  65
 
    ppo
 

maggie