java分页

public static List<Object> page(int start, int size, List<Object> list)            throws Exception {        List<Object> result = new ArrayList<Object>();        if (list != null && list.size() > 0) {            if(start>list.size()){                result=null;            }else if(start+size>list.size()){                    result=list.subList(start, list.size());            }else{                    result = list.subList(start, start+size);                 }        }        return (result != null && result.size() > 0) ? result : null;    }