PageUtil

import java.util.List;
/**
 * 用户每次查询就创建这个对象
 * 页面数据对象
 * @author Hao
 */
@SuppressWarnings("all")
public class PageUtil {
    
    private int pageSize; //每页展示的数据
    private int totalData; //总数据数
    private int navCount; //导航条数目
    private int currPage; //当前页码
    
    private int totalPage; //总页数
    
    private int nextPage; //下一页
    private int prevPage; //上一页
    
    private int firstPage; //首页
    private int lastPage;  //尾页
    
    private int startRow; //起始记录号

    private int startNav; //开始导航条数字
    private int endNav;      //结束导航条数字
        
    
    private List pageData; //当前1页的数据
    
    //需要用户传入的参数
    public PageUtil(int pageSize,int currPage,int navCount,int totalData) {
        this.pageSize = pageSize;
        this.currPage = currPage;
        this.navCount = navCount;
        this.totalData = totalData;
        
        this.totalPage = (int)Math.ceil(this.totalData  / (this.pageSize * 1.0));
        
        this.firstPage = 1;
        this.lastPage = this.totalPage;
        
        this.prevPage = this.currPage - 1 > 0 ?this.currPage-1 : this.firstPage;
        this.nextPage = this.currPage + 1 > this.lastPage ? this.lastPage : this.currPage + 1;

        this.startRow = (this.currPage - 1) * this.pageSize;

        this.startNav = this.currPage - this.navCount / 2 > 0 ? this.currPage - this.navCount / 2 : this.firstPage;
        this.endNav = this.startNav + this.navCount - 1 > this.lastPage ? this.lastPage : this.startNav + this.navCount - 1;

        if(this.endNav > this.navCount - 1){
            this.startNav = this.endNav - this.startNav < this.navCount - 1 ? this.endNav - this.navCount + 1 : this.startNav;
        }else{
            this.startNav = this.firstPage;
        }
        
    }
    
    public PageUtil() {
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public int getTotalData() {
        return totalData;
    }

    public void setTotalData(int totalData) {
        this.totalData = totalData;
    }

    public int getNavCount() {
        return navCount;
    }

    public void setNavCount(int navCount) {
        this.navCount = navCount;
    }

    public int getCurrPage() {
        return currPage;
    }

    public void setCurrPage(int currPage) {
        this.currPage = currPage;
    }

    public int getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public int getNextPage() {
        return nextPage;
    }

    public void setNextPage(int nextPage) {
        this.nextPage = nextPage;
    }

    public int getPrevPage() {
        return prevPage;
    }

    public void setPrevPage(int prevPage) {
        this.prevPage = prevPage;
    }

    public int getFirstPage() {
        return firstPage;
    }

    public void setFirstPage(int firstPage) {
        this.firstPage = firstPage;
    }

    public int getLastPage() {
        return lastPage;
    }

    public void setLastPage(int lastPage) {
        this.lastPage = lastPage;
    }

    public int getStartRow() {
        return startRow;
    }

    public void setStartRow(int startRow) {
        this.startRow = startRow;
    }

    public int getStartNav() {
        return startNav;
    }

    public void setStartNav(int startNav) {
        this.startNav = startNav;
    }

    public int getEndNav() {
        return endNav;
    }

    public void setEndNav(int endNav) {
        this.endNav = endNav;
    }

    public List getPageData() {
        return pageData;
    }

    public void setPageData(List pageData) {
        this.pageData = pageData;
    }
    
    
    
    
}