Ajax——XStream

> xstream.omitField(City.class,"description")：在生成的xml中不会出现City类的名为description的对应的元素！

package demo1;

public class City {
	private String name;
	private String description;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getDescription() {
		return description;
	}
	public void setDescription(String description) {
		this.description = description;
	}
	public City(String name,String description) {
		super();
		this.name = name;
		this.description = description;
	}
	public City() {
		super();
		// TODO Auto-generated constructor stub
	}
	
}

package demo1;

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

public class Province {
	private String name;
	private List<City> cities=new ArrayList<City>();
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public List<City> getCities() {
		return cities;
	}
	public void setCities(List<City> cities) {
		this.cities = cities;
	}
	
	public void addCity(City city){
		this.cities.add(city);
	}
	public Province(String name) {
		super();
		this.name = name;
	}
	
}

package demo1;

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

import org.junit.Test;

import com.thoughtworks.xstream.XStream;

public class Demo {
	
	public List<Province> getProinvceList(){
		Province p1=new Province("北京");
		p1.addCity(new City("朝阳区","chaoyang"));
		p1.addCity(new City("西城区","xiCheng"));
		
		Province p2=new Province("内蒙古");
		p2.addCity(new City("呼和浩特","huhehaote"));
		p2.addCity(new City("包头","baotou"));
		
		List<Province> list=new ArrayList<Province>();
		list.add(p1);
		list.add(p2);
		
		return list;
	}
	
	@Test
	public void fun1(){
		List<Province> provinces=getProinvceList();
		/*
		 * 创建XStream对象
		 * 调用toXML把集合转换成xml字符串
		 */
		XStream xstream=new XStream();
		System.out.println(xstream.toXML(provinces));
	}
	
	/*
	 * 别名(alias)
	 * 希望：
	 * * 默认List类型对应<list>元素，希望让List类型对应<china>元素
	 * * 默认Province类型对应<demo1.Province>，希望让它对应<province>
	 * * 默认City类型对应<demo1.City>，希望它对应<city>元素
	 */
	
	@Test
	public void fun2(){
		List<Province> provinces=getProinvceList();
		
		/*
		 * 创建XStream对象
		 * 调用toXML把集合转换成xml字符串
		 */		
		XStream xstream=new XStream();
		xstream.alias("china",List.class);
		xstream.alias("province",Province.class);
		xstream.alias("city",City.class);
		
		System.out.println(xstream.toXML(provinces));
	}
	
	@Test
	public void fun3(){
		List<Province> provinces=getProinvceList();
		
		/*
		 * 创建XStream对象
		 * 调用toXML把集合转换成xml字符串
		 */		
		XStream xstream=new XStream();
		xstream.alias("china",City.class);
		/*
		 * 把Province类型的name属性，生成<province>元素的属性
		 */
		xstream.useAttributeFor(Province.class,"name");
		
		System.out.println(xstream.toXML(provinces));
	}
	
	/*
	 * 去掉List类型的属性
	 */
	@Test
	public void fun4(){
		List<Province> provinces=getProinvceList();
			
		XStream xstream=new XStream();
		xstream.alias("china",City.class);
		xstream.useAttributeFor(Province.class,"name");
		/*
		 * 去掉<cities>这样的Collection属性
		 */
		xstream.addImplicitCollection(Province.class,"cities");
		
		System.out.println(xstream.toXML(provinces));
	}
	
	/*
	 * /**
	 * 去除不想要的javabean属性，不生成对应的xml元素！
	 */
	@Test
	public void fun5(){
		List<Province> provinces=getProinvceList();
			
		XStream xstream=new XStream();
		xstream.alias("china","name");
		xstream.addImplicitCollection(Province.class,"cities");
		
		/*
		 * 让City类的，名为description属性不生成对应的xml元素
		 */
		xstream.omitField(City.class,"description");
		
		System.out.println(xstream.toXML(provinces));
	}
	
	
	
}

（编辑：李大同）

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