分页技术

package cn.wht.cookstore.model;

import java.util.List;

public class Page<T> {

	//页面传来的数据
	private int pageNum;
	private int pageSize=1;
	
	//从数据库获得的数据
	private int totalRecord;
	private List<T> recordList;
	
	//页面显示的数据
	private int startPage;
	private int endPage;
	private int startIndex;
	private int pageCount;
	
	//上一页  下一页
	private boolean hasPreviousPage;
	private boolean hasnextPage;
	private int previousPage;
	private int nextPage;
	
	
	//初始化数据  
	public Page(int totalRecord , int pageNum){
		
		this.pageNum=pageNum;
		this.totalRecord=totalRecord;
		
		this.pageCount=(this.totalRecord+(this.pageSize-1))/pageSize;
		this.startIndex=(this.pageNum-1)*pageSize;
		
		if(this.pageCount<=10){
			this.startPage=1;
			this.endPage=this.pageCount;
			
		}else{
			this.startPage=this.pageNum-4;
			this.endPage=this.pageNum+5;
			
			if(this.startPage<1){
				this.startPage=1;
				this.endPage=10;
			}else if(this.endPage>this.pageCount){
				this.endPage=this.pageCount;
				this.startPage=this.pageCount-9;
			}
		}
		
		if(pageNum>1){
			this.previousPage=this.pageNum-1;
			this.hasPreviousPage=true;
		}
		if(pageNum<this.pageCount){
			this.nextPage=pageNum+1;
			this.hasnextPage=true;
		}
	}
	
	
	public int getPageNum() {
		return pageNum;
	}
	public void setPageNum(int pageNum) {
		this.pageNum = pageNum;
	}
	public int getPageSize() {
		return pageSize;
	}
	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}
	public int getTotalRecord() {
		return totalRecord;
	}
	public void setTotalRecord(int totalRecord) {
		this.totalRecord = totalRecord;
	}
	public List<T> getRecordList() {
		return recordList;
	}
	public void setRecordList(List<T> recordList) {
		this.recordList = recordList;
	}
	public int getStartPage() {
		return startPage;
	}
	public void setStartPage(int startPage) {
		this.startPage = startPage;
	}
	public int getEndPage() {
		return endPage;
	}
	public void setEndPage(int endPage) {
		this.endPage = endPage;
	}
	public int getStartIndex() {
		return startIndex;
	}
	public void setStartIndex(int startIndex) {
		this.startIndex = startIndex;
	}
	public int getPageCount() {
		return pageCount;
	}
	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}


	
	
	
	public boolean isHasPreviousPage() {
		return hasPreviousPage;
	}


	public void setHasPreviousPage(boolean hasPreviousPage) {
		this.hasPreviousPage = hasPreviousPage;
	}


	public boolean isHasnextPage() {
		return hasnextPage;
	}


	public void setHasnextPage(boolean hasnextPage) {
		this.hasnextPage = hasnextPage;
	}


	public int getPreviousPage() {
		return previousPage;
	}


	public void setPreviousPage(int previousPage) {
		this.previousPage = previousPage;
	}


	public int getNextPage() {
		return nextPage;
	}


	public void setNextPage(int nextPage) {
		this.nextPage = nextPage;
	}
	
	
	
}
package cn.wht.cookstore.model;

import java.util.