public class CourseAdapter extends BaseAdapter {

 private Context context;
 private List<Course> coursetList;

 public CourseAdapter(Context context, List<Course> coursetList) {
 this.context = context;
 this.coursetList = coursetList;
 }

 public int getCount() {
 return coursetList.size();
 }

 public Object getItem(int position) {
 return coursetList.get(position);
 }

 public long getItemId(int position) {
 return position;
 }

 /**
 * 通知adapter更新数据
 */
 @Override
 public void notifyDataSetChanged() {
 super.notifyDataSetChanged();
 }

 public View getView(int position, View convertView, ViewGroup parent) {

 if (convertView == null) {
 //这里加载的每一个item条目的布局文件
 convertView = LayoutInflater.from(context).inflate(
  R.layout.student_score_item, null);
 }

 TextView tv_name = (TextView) convertView.findViewById(R.id.tv_name);
 TextView tv_course = (TextView) convertView
 .findViewById(R.id.tv_course);
 TextView tv_score = (TextView) convertView.findViewById(R.id.tv_score);

 // 获得某一个位置的student
 Course course = coursetList.get(position);
 tv_name.setText(course.getStudentName() + "");
 tv_course.setText(course.getCourseName() + "");
 tv_score.setText(course.getCourseSocre() + "");

 return convertView;
 }

}

public class PersonFactory {

 /**
 * 根据类的名称来生产对象：java的反射机制使用
 * 
 * @param className
 * @return
 */
 public PersonInter getPersonByClass(String className) {

 try {
 PersonInter personInter = (PersonInter) Class.forName(className).newInstance();
 return personInter;
 } catch (InstantiationException e) {
 e.printStackTrace();
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 } catch (ClassNotFoundException e) {
 e.printStackTrace();
 }
 return null;
 }

 /**
 * 根据类型来创建对象
 */
 public PersonInter getHair(String key) {
 if ("student".equals(key)) {
 return new StudentImpl();
 } else if ("teacher".equals(key)) {
 return new TeacherImpl();
 }
 return null;
 }

 /**
 * 根据类的名称来生产对象:java的映射
 */
 public PersonInter getPersonByClassKey(String key) {

 try {
 Map<String, String> map = new PropertiesReader().getProperties();

 PersonInter person = (PersonInter) Class.forName(map.get(key)).newInstance();
 return person;
 } catch (InstantiationException e) {
 e.printStackTrace();
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 } catch (ClassNotFoundException e) {
 e.printStackTrace();
 }
 return null;
 }
}