java实现分页功能的类详解编程语言

package smn.util; 
 
public class Pager { 
    private int pageNow; 
    private int pageSize=4; 
    private int totalPage;//共有若干页 
    private int totalSize;//纪录数 
    private boolean hasFirst;//是否有首页 
    private boolean hasPre;//是否有前一页 
    private boolean hasNext;//是否有下一页 
    private boolean hasLast;//是否有末页 
    public Pager(int pageNow,int totalSize){ 
        this.pageNow=pageNow; 
        this.totalSize=totalSize; 
    } 
    public int getPageNow() { 
        return pageNow; 
    } 
    public void setPageNow(int pageNow) { 
        this.pageNow = pageNow; 
    } 
    public int getPageSize() { 
        return pageSize; 
    } 
    public void setPageSize(int pageSize) { 
        this.pageSize = pageSize; 
    } 
    public int getTotalPage() { 
        //页数算法 
        totalPage=getTotalSize()/getPageSize(); 
        if(totalSize%pageSize!=0){ 
            totalPage++; 
        } 
        return totalPage; 
    } 
    public void setTotalPage(int totalPage) { 
        this.totalPage = totalPage; 
    } 
    public int getTotalSize() { 
        return totalSize; 
    } 
    public void setTotalSize(int totalSize) { 
        this.totalSize = totalSize; 
    } 
    public boolean isHasFirst() { 
        //假如当前页数为第一页就没有首页 
        if(pageNow==1){ 
            return false; 
        }else{ 
            return true; 
        } 
    } 
    public void setHasFirst(boolean hasFirst) { 
        this.hasFirst = hasFirst; 
    } 
    public boolean isHasPre() { 
        //假如有首页就有前一页 
        if(this.isHasFirst()){ 
            return true; 
        }else{ 
            return false; 
        } 
    } 
    public void setHasPre(boolean hasPre) { 
        this.hasPre = hasPre; 
    } 
    public boolean isHasNext() { 
        //假如有尾页就有下一页 
        if(this.isHasLast()){ 
            return true; 
        }else{ 
            return false; 
        } 
    } 
    public void setHasNext(boolean hasNext) { 
        this.hasNext = hasNext; 
    } 
    public boolean isHasLast() { 
        //假如不是最后一页就有尾页 
        if(pageNow==this.getTotalPage()){ 
            return false; 
        }else{ 
            return true; 
        } 
    } 
    public void setHasLast(boolean hasLast) { 
        this.hasLast = hasLast; 
    } 
     
     
}