javabean转换成xml（XStream）小工具

package cn.itcast.demo1;

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

import org.junit.Test;

import com.thoughtworks.xstream.XStream;

/**
 * 演示XStream
 * @author cxf
 *
 */
public class Demo1 {
    // 返回javabean集合
    public List<Province> getProinvceList() {
        Province p1 = new Province();
        p1.setName("北京");
        p1.addCity(new City("东城区", "DongChengQu"));
        p1.addCity(new City("昌平区", "ChangPingQu"));
        
        Province p2 = new Province();
        p2.setName("辽宁");
        p2.addCity(new City("沈阳", "shenYang"));
        p2.addCity(new City("葫芦岛", "huLuDao"));
        
        List<Province> provinceList = new ArrayList<Province>();
        provinceList.add(p1);
        provinceList.add(p2);
        
        return provinceList;
    }
    
    /**
<list> --> List类型显示list
  <cn.itcast.demo1.Province> --> javabean的类型为Province，它元素的名称为类的完整名
    <name>北京</name> --> javabean的属性名
    <cities> --> javabean的属性名
      <cn.itcast.demo1.City> --> 类名
        <name>东城区</name> --> 属性名
        <description>DongChengQu</description> --> 属性名
      </cn.itcast.demo1.City>
      <cn.itcast.demo1.City>
        <name>昌平区</name>
        <description>ChangPingQu</description>
      </cn.itcast.demo1.City>
    </cities>
  </cn.itcast.demo1.Province>
  <cn.itcast.demo1.Province>
    <name>辽宁</name>
    <cities>
      <cn.itcast.demo1.City>
        <name>沈阳</name>
        <description>shenYang</description>
      </cn.itcast.demo1.City>
      <cn.itcast.demo1.City>
        <name>葫芦岛</name>
        <description>huLuDao</description>
      </cn.itcast.demo1.City>
    </cities>
  </cn.itcast.demo1.Province>
</list>
     */
    @Test
    public void fun1() {
        List<Province> proList = getProinvceList();
        /*
         * 创建XStream对象
         * 调用toXML把集合转换成xml字符串
         */
        XStream xstream = new XStream();
        String s = xstream.toXML(proList);
        System.out.println(s);
    }
    
    /*
     * 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<cn.itcast.demo1.Province>，希望让它对应<province>
     * * 默认City类型对应<cn.itcast.demo1.City>，希望它对应<city>元素
     */
    /*
<china>
  <province>
    <name>北京</name>
    <cities>
      <city>
        <name>东城区</name>
        <description>DongChengQu</description>
      </city>
      <city>
        <name>昌平区</name>
        <description>ChangPingQu</description>
      </city>
    </cities>
  </province>
  <province>
    <name>辽宁</name>
    <cities>
      <city>
        <name>沈阳</name>
        <description>shenYang</description>
      </city>
      <city>
        <name>葫芦岛</name>
        <description>huLuDao</description>
      </city>
    </cities>
  </province>
</china>
     */
    @Test
    public void fun2() {
        List<Province> proList = getProinvceList();
        XStream xstream = new XStream();
        /*
         * 给指定的类型指定别名
         */
        xstream.alias("china", List.class);//给List类型指定别名为china
        xstream.alias("province", Province.class);//给Province指定别名为province
        xstream.alias("city", City.class);//给City类型指定别名为city
        
        
        String s = xstream.toXML(proList);
        System.out.println(s);
    }
    
    /*
     * 默认javabean的属性都会生成子元素，而现在希望生成元素的属性
     */
/*
<china>
  <province name="北京">
    <cities>
      <city>
        <name>东城区</name>
        <description>DongChengQu</description>
      </city>
      <city>
        <name>昌平区</name>
        <description>ChangPingQu</description>
      </city>
    </cities>
  </province>
  <province name="辽宁">
    <cities>
      <city>
        <name>沈阳</name>
        <description>shenYang</description>
      </city>
      <city>
        <name>葫芦岛</name>
        <description>huLuDao</description>
      </city>
    </cities>
  </province>
 */
    @Test
    public void fun3() {
        List<Province> proList = getProinvceList();
        XStream xstream = new XStream();
        xstream.alias("china", List.class);//给List类型指定别名为china
        xstream.alias("province", Province.class);//给Province指定别名为province
        xstream.alias("city", City.class);//给City类型指定别名为city
        
        
        /*
         * 把Province类型的name属性，生成<province>元素的属性
         */
        xstream.useAttributeFor(Province.class, "name");
        
        
        String s = xstream.toXML(proList);
        System.out.println(s);        
    }

    
    /*
     * 去除List类型的属性，只把list中的元素生成xml元素
     */
/*
<china>
  <province name="北京">
    <city>
      <name>东城区</name>
      <description>DongChengQu</description>
    </city>
    <city>
      <name>昌平区</name>
      <description>ChangPingQu</description>
    </city>
  </province>
  <province name="辽宁">
    <city>
      <name>沈阳</name>
      <description>shenYang</description>
    </city>
    <city>
      <name>葫芦岛</name>
      <description>huLuDao</description>
    </city>
  </province>
</china>
 */
    @Test
    public void fun4() {
        List<Province> proList = getProinvceList();
        XStream xstream = new XStream();
        xstream.alias("china", List.class);//给List类型指定别名为china
        xstream.alias("province", Province.class);//给Province指定别名为province
        xstream.alias("city", City.class);//给City类型指定别名为city
        xstream.useAttributeFor(Province.class, "name");//把Province类型的name属性，生成<province>元素的属性
        
        
        /*
         * 去除<cities>这样的Collection类型的属性
         * 去除Provice类的名为cities的List类型的属性！
         */
        xstream.addImplicitCollection(Province.class, "cities");
        
        
        String s = xstream.toXML(proList);
        System.out.println(s);        
    }
    
    /**
     * 去除不想要的javabean属性
     * 就是让某引起javabean属性，不生成对应的xml元素！
     */
/*
<china>
  <province name="北京">
    <city>
      <name>东城区</name>
    </city>
    <city>
      <name>昌平区</name>
    </city>
  </province>
  <province name="辽宁">
    <city>
      <name>沈阳</name>
    </city>
    <city>
      <name>葫芦岛</name>
    </city>
  </province>
</china>
 */
    @Test
    public void fun5() {
        List<Province> proList = getProinvceList();
        XStream xstream = new XStream();
        xstream.alias("china", List.class);//给List类型指定别名为china
        xstream.alias("province", Province.class);//给Province指定别名为province
        xstream.alias("city", City.class);//给City类型指定别名为city
        xstream.useAttributeFor(Province.class, "name");//把Province类型的name属性，生成<province>元素的属性
        xstream.addImplicitCollection(Province.class, "cities");//去除Provice类的名为cities的List类型的属性！
        
        
        /*
         * 让City类的，名为description属性不生成对应的xml元素
         */
        xstream.omitField(City.class, "description");
        
        
        String s = xstream.toXML(proList);
        System.out.println(s);        
    }
}

province:

public class Province {
    private String name;// 省名
    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) {
        cities.add(city);
    }

city:

public class City {
    private String name;//市名
    private String description;//描述
    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;
    }
    @Override
    public String toString() {
        return "City [name=" + name + ", description=" + description + "]";
    }
    public City() {
        super();
        // TODO Auto-generated constructor stub
    }
    public City(String name, String description) {
        super();
        this.name = name;
        this.description = description;
    }