Collections.sort('传入你需要排序的集合;列如(List<TeacherAtten>)', new Comparator<TeacherAtten>() {

    @Override
    public int compare(TeacherAtten o1, TeacherAtten o2) {
        // 根据属性进行排序
        if (Long.parseLong(o1.getTime().replaceAll("-","")) > Long.parseLong(o2.getTime().replaceAll("-",""))) {
            return 1;
        }
        if (Long.parseLong(o1.getTime().replaceAll("-","")) == Long.parseLong(o2.getTime().replaceAll("-",""))) {
            return 0;
        }
        return -1;
    }
});