if(total <= 0) {
if(total<=0 && students!=null) {
	public void formatAndWrite(List<Student> students, HttpServletResponse response) {		Map<String, Object> map = new HashMap<String, Object>();		int total = SystemContext.getTotal();		if(total <= 0) {			total = students.size();		}		map.put("total", total);		map.put("rows", students);		JSONUtils.toJSON(map, response);	}