分页工具类设计-优快云博客

本文介绍了一个通用的分页工具类Page的设计与实现，该类能够处理数据分页逻辑，包括计算当前页、总页数及是否有下一页等关键功能。

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package 
com.utis.util;
 
import 
java.util.List;
 
public 
class Page<T> {
    private
int pageSize =10;
//每页显示条数
    private
int totalCount; 
//总条数
    private
int start; //开始条数
    private
int pageNo;//当前页
    private
int totalPages; 
//总页数
    private
List<T> pageList;//数据
      
    public
Page(int 
totalCount){
        this.totalCount = totalCount;
    }
      
    /**
     * ��ȡ��ǰ获取��下一条
     */
    public
int getCurrentPageNo(){
        return
start / pageSize + 1;
    }
    /**       
     * �Ƿ�����是否有下一条
     * @return
     */
    public
boolean getHasNextPage(){
        return
getCurrentPageNo() < totalPages;
    }
    /**
     * �Ƿ�����当前页是否大于1
     * @return
     */
    public
boolean getHasPavPage(){
        return
getCurrentPageNo() > 1;
    }
    /**
     * ��ȡ��获取中页数��
     * @return
     */
    public
int getTotalPages() {
        totalPages = totalCount / pageSize;
          
        if(totalCount % pageSize !=
0){
            totalPages++;
        }
          
        return
totalPages;
    }
    /**
     * ��õ�设置当前页����ʼ��的开始条数
     * @param pageNo ��ǰ页数��
     * @return
     */
    public
int getStart(int
pageNo){
          
        if(pageNo <
1){
            pageNo =
1;
        }
        else
if(getTotalPages()>0&&pageNo > getTotalPages()){
            pageNo = getTotalPages();
        }
          
        start = (pageNo-1) * pageSize;
        return
start;
    }
      
    //get and set
    public
int getPageSize() {
        return
pageSize;
    }
    public
void setPageSize(int
pageSize) {
        this.pageSize = pageSize;
    }
    public
int getTotalCount() {
        return
totalCount;
    }
    public
void setTotalCount(int
totalCount) {
        this.totalCount = totalCount;
    }
    public
void setStart(int
start) {
        this.start = start;
    }
    public
List<T> getPageList() {
        return
pageList;
    }
    public
void setPageList(List<T> pageList) {
        this.pageList = pageList;
    }
    public
void setTotalPages(int
totalPages) {
        this.totalPages = totalPages;
    }
 
    public
int getPageNo() {
        return
pageNo;
    }
 
    public
void setPageNo(int
pageNo) {
        this.pageNo = pageNo;
    }
     
}