一：功能
可以将JavaBean转换（序列化）成XMl
二：依赖jar包
xstream.jar
xpp3_min.jar（xml pull parser）xml解析器
三：使用步骤
XStream xstream = new XStream();
String xmlStream = xstream.toXML(JavaBean);
四：使用细节
别名：把对应的元素名改了，因为生成的元素名会包含整个JavaBean的全路径
// 指定别名
xStream.alias("china",List.class);
xStream.alias("province",Province.class);
xStream.alias("city",City.class);
使用为属性，默认类的成员，生成的是子元素，我们希望将它改为属性，如name
// 把Province类型的name属性，生成<province>元素的属性
xStream.useAttributeFor(Province.class,"name");
去除collection类型的成员名，只是需要collection的内容，不希望collection本身再生成一个子节点去包含它的内容
xStream.addImplicitCollection(Province.class,"citys");
去除类的指定的成员名，JavaBean可能包含我们不需要在XML中使用的属性，所以需要去除多有的成员
xStream.omitField(City.class,"description");
五：源码
JavaBean
package xstream; /**
* Created by YuWenHui on 2017/4/24 0024.
*/
public class City {
private String name;
private String description; public City(String name, String description) {
this.name = name;
this.description = description;
} public City() {
super();
} public String getDescription() {
return description;
} public void setDescription(String description) {
this.description = description;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
}
package xstream; import java.util.ArrayList;
import java.util.List; /**
* Created by YuWenHui on 2017/4/24 0024.
*/
public class Province {
private String name;
List<City> citys = new ArrayList<City>(); public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public List<City> getCitys() {
return citys;
} public void setCitys(List<City> citys) {
this.citys = citys;
} public void addCity(City city){
citys.add(city);
}
}
dome
package xstream; import com.thoughtworks.xstream.XStream; import java.util.ArrayList;
import java.util.List; /**
* Created by YuWenHui on 2017/4/24 0024.
*/
public class Dome {
// 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("江西");
p2.addCity(new City("上饶", "ShangRao"));
p2.addCity(new City("宜春", "YiChun")); List<Province> provinceList = new ArrayList<Province>();
provinceList.add(p1);
provinceList.add(p2); return provinceList;
}
@org.junit.Test
public void test(){
List<Province> provinceList = getProinvceList();
XStream xStream = new XStream();
// 指定别名
xStream.alias("china",List.class);
xStream.alias("province",Province.class);
xStream.alias("city",City.class);
// 把Province类型的name属性，生成<province>元素的属性
xStream.useAttributeFor(Province.class,"name");
// 去除collection类型的成员名，只是需要collection的内容，不希望collection本身再生成一个子节点去包含它的内容
xStream.addImplicitCollection(Province.class,"citys");
// 去除类的指定的成员名，JavaBean可能包含我们不需要在XML中使用的属性，所以需要去除多有的成员
xStream.omitField(City.class,"description");
String s = xStream.toXML(provinceList);
System.out.println(s);
}
}
六：结果
<china>
<province name="北京">
<city>
<name>东城区</name>
</city>
<city>
<name>昌平区</name>
</city>
</province>
<province name="江西">
<city>
<name>上饶</name>
</city>
<city>
<name>宜春</name>
</city>
</province>
</china>