public class Test {
public static void main(String[] args) {
Student s1 = new Student();
Student s2 = new Student();
s1.setName("xiaoMing");
s2.setName("xiaoHong");
s1.setNo("001");
s2.setNo("002");
List<Student> list = new ArrayList<Student>();
list.add(s1);
list.add(s2);
Teacher teacher = new Teacher();
teacher.setName("WangLaoshi");
teacher.setStudent(list);
XStream xs = new XStream();
xs.alias("student", Student.class);
xs.alias("teacher", Teacher.class);
xs.addImplicitCollection(Teacher.class, "students");
//转换成XML
String xml = xs.toXML(teacher);
System.out.println(xml);
//再转换成对象，students为空，输出结果报空指针异常
Teacher t2 = (Teacher) xs.fromXML(xml);
System.out.println(t2.getStudents().size());
}
}
class Teacher{
private String name;
private List<Student> students;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Student> getStudents() {
return students;
}
public void setStudent(List<Student> students) {
this.students = students;
}
}
class Student{
private String name;
private String no;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
}<teacher>
<name>WangLaoshi</name>
<student>
<name>xiaoMing</name>
<no>001</no>
</student>
<student>
<name>xiaoHong</name>
<no>002</no>
</student>
</teacher>
