对象排序

/** OK
 * @param paraMap  store_ids: "20,30"
 *                 class_ids: "75,80"
 * @return         List<LessonPiont> sort by point
 */
public List<LessonPiont> getLessonPointList(HashMap<String,String> paraMap){
    CourseUtil util = new CourseUtil();
    List<Map<String,Object>> list = util.getCourseByMyOderCT(paraMap);  //get data from index
    ArrayList<LessonPiont> pointList = new ArrayList<LessonPiont>();
    for (Map<String,Object> map:list) {
        for (String key : map.keySet()) {
            LessonPiont lessonPoint = new LessonPiont();
            lessonPoint.parseKey(key);
            HashMap<String,Object> valueMap = (HashMap<String,Object>)map.get(key);
            int point =Integer.parseInt(valueMap.get("sign_name").toString());
            lessonPoint.setPoint(point);
            pointList.add(lessonPoint);
        }
    }

    Collections.sort(pointList, new Comparator<LessonPiont>(){
        @Override
        public int compare(LessonPiont less1, LessonPiont less2) {
            if(less1.getPoint()>less2.getPoint()){
                return -1;
            }else{
                return 1;
            }
        }
    });
    return pointList;
}