java：自己写的实现翻页功能的类

在java中，翻页比较头疼，下面是我写的一个实现翻页功能的类
请高手指正。
我的体会：
优点：简单好用
缺点：一次就从数据库中读出了所有的信息。不知如何改进，请指教   
public class selectPage implements java.io.Serializable{  //我的翻页类
        private int pageRecord;    //分页单位=10       
        private int currentPage;   //当前页=1
       
        private ArrayList allInfo;  //  记录集
        private int allRow;    //数据表总记录数=0
        private int pages;         //总页数=0
               
        public selectPage(ArrayList list) {
            this.allInfo = list;             
            this.pageRecord = 10;           
            this.currentPage = 1;
            this.allRow = list.size();
            this.pages = allRow/10;
            if(allRow%10!=0)this.pages++;
            }
       
        public void setPageRecord(int pgrecord){
            pageRecord = pgrecord;
            }
           
        public void setPages(){     //根据pageRecord改变总页
            int p = allRow/pageRecord;           
            if(allRow%pageRecord!=0)p++; 
            this.pages = p;
            }
           
        public void setCurrentPage(int curpage){
            currentPage = curpage;
            }
           
        public int getPageRecord(){
            return pageRecord;
            }
           
        public int getPages(){
            return pages;
            }
           
        public int getCurrentPage(){
            return currentPage;
            }
           
        public int getAllRow(){
            return allRow;
            }   
       
        public ArrayList getPage(){
            ArrayList tempList = new ArrayList();
            int endindex = pageRecord*currentPage > allRow? allRow:pageRecord*currentPage;
            for(int i=pageRecord*(currentPage-1);i<endindex;i++){
                tempList.add(allInfo.get(i));
                }
            return tempList;
            }
       
        public String toString(){
            String tempStr = "pageRecord="+this.getPageRecord()+"currentPage="+this.getCurrentPage()+"allRow="+this.getAllRow()+"pages="+this.getPages();
            return tempStr;
            }
        }

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