java list进行排序

List<SubjectEntity> subjectTableEntities = subjectService.selectByMap(map);
//直接在这里添加我们的排序规则
Collections.sort(subjectTableEntities, new Comparator<SubjectEntity>() {
    public int compare(SubjectEntity arg0, SubjectEntity arg1) {
        return arg0.getCode().compareTo(arg1.getCode());
    }
});