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  public class Teacher {

    private String name;

    private String source;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public

        return source;

    }

    public void setSource(String source) {

        this.source = source;

    }

}

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public class Address {

    private String province;

    private String city;

    public String getProvince() {

        return province;

    }

    public void setProvince(String province) {

        this.province = province;

    }

    public String getCity() {

        return city;

    }

    public void setCity(String city) {

        this.city = city;

    }

}

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public class Student {

    private String name;

    private int age;

    private List<Address> addresses;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public List<Address> getAddresses() {

        return addresses;

    }

    public void setAddresses(List<Address> addresses) {

        this.addresses = addresses;

    }

}

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 public class Room {

    private Teacher teacher;

    private List<Student> students;

    public Teacher getTeacher() {

        return teacher;

    }

    public void setTeacher(Teacher teacher) {

        this.teacher = teacher;

    }

    public List<Student> getStudents() {

        return students;

    }

    public void setStudents(List<Student> students) {

        this.students = students;

    }

}

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public class ReadXML {

    // 解析XML

    public Room read() throws DocumentException {

        Room room = new Room();

        Teacher teacher = new Teacher();

        List<Student> students = new ArrayList<Student>();

        // 1、把XMl載入到記憶體中。

        SAXReader reader = new SAXReader();

        Document document = reader.read("./xml/room2.xml");

        // 2、先讀取根元素 Element

        Element rootElement = document.getRootElement();

        // 3、根據根元素獲得其子元素

        Element teacherElement = rootElement.element("teacher");

        teacher.setName(teacherElement.elementText("name"));

        teacher.setSource(teacherElement.elementText("source"));

        // System.out.println(teacherElement.elementText("name"));

        /*

          Element nameElement =teacherElement.element("name");

          System.out.println(nameElement.getText());

         */

        // 解析多個元素

        List<Element> studentsElements = rootElement.elements("student");

        for (int i = 0; i < studentsElements.size(); i++) {

            Element studentElement = studentsElements.get(i);

            Student student = new Student();

            student.setName(studentElement.elementText("name"));

            student.setAge(Integer.parseInt(studentElement.elementText("age")));

            // 解析多個元素

            List<Element> addressesElements = studentElement

                    .elements("address");

            List<Address> addresses = new ArrayList<Address>();

            for (int j = 0; j < addressesElements.size(); j++) {

                Element addressElement = addressesElements.get(j);

                Address address = new Address();

                address.setProvince(addressElement.elementText("province"));

                address.setCity(addressElement.elementText("city"));

                // 新增到list中

                addresses.add(address);

            }

            student.setAddresses(addresses);

            students.add(student);

        }

        room.setStudents(students);

        room.setTeacher(teacher);

        return room;

    }

}

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 public static void main(String[] args) {

        ReadXML readXML = new ReadXML();

        try {

            Room room = readXML.read();

            System.out.println("教師的姓名："+room.getTeacher().getName());

            System.out.println("學生物件："+room.getStudents().size());

            System.out.println("第一個學生的姓名"+room.getStudents().get(0).getName());

        } catch (DocumentException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }