Page分页

package org.grey.utils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@SuppressWarnings({"unchecked","unused"})
public class Page {
	private int pageNo=1; //当前页
	private int pageSize = 10; //每页大小
	private int totalPages;  //总页
	private int totalRows; //总行数
	private List list = new ArrayList(0);  //存放数据
	//翻页条 示例 1 2 3 4 5 
	private int barNumbers = 5; //几个为一条，默认为5
	private List listNumbers = new ArrayList(); //数字翻页条
	public Page(int pageNo, int pageSize, int totalPages, List list) {
		this.pageNo = pageNo;
		this.pageSize = pageSize;
		this.totalPages = totalPages;
		this.list = list;
	}
	
	public int getPageNo() {
		return pageNo>this.getTotalPages() ? this.getTotalPages() : (pageNo ==0 ? 1 : pageNo);
	}
	public void setPageNo(int pageNo) {
		this.pageNo = pageNo;
	}
	public int getPageSize() {
		return pageSize;
	}
	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}
	public int getTotalPages() {
		totalPages = this.getTotalRows()%this.getPageSize()==0 ? this.getTotalRows()/this.getPageSize() : (this.getTotalRows()/this.getPageSize())+1;
		return totalPages;
	}
	public void setTotalPages(int totalPages) {
		this.totalPages = totalPages;
	}
	public int getTotalRows() {
		return totalRows;
	}
	public void setTotalRows(int totalRows) {
		this.totalRows = totalRows;
	}
	
	public List getList() {
		return list;
	}
	public void setList(List list) {
		this.list = list;
	}
	public int getBarNumbers() {
		return barNumbers;
	}
	public void setBarNumbers(int barNumbers) {
		this.barNumbers = barNumbers;
	}
	//分页条 如：1 2 3 4 5 6 
	public List getListNumbers() {
		List listn = new ArrayList();
		//总显示条数
		int totbars = this.getTotalPages()%this.getBarNumbers()==0 ? this.getTotalPages()/this.getBarNumbers() : this.getTotalPages()/this.getBarNumbers()+1;
		//当前显示条数
		int currentBar = this.getPageNo()%this.getBarNumbers()==0 ? this.getPageNo() /this.getBarNumbers() : this.getPageNo() /this.getBarNumbers()+1;
		if(this.getPageNo()==this.getBarNumbers()*currentBar && currentBar != totbars) {
			currentBar++;
		}
		if(this.getPageNo()==(this.getBarNumbers()*currentBar-this.getBarNumbers()+1) && currentBar >1) {
			currentBar--;
		}
		for(int i=this.getBarNumbers()*currentBar; i>(currentBar==1 ? 0 : this.getBarNumbers()*(currentBar-1)); i--) {
			if(i<=this.getTotalPages()) {
				listn.add(i);
			}
		}
		Collections.sort(listn);
		return listn;
	}
	
//	public static void main(String[] args) {
//		Page p = new Page();
//		p.setTotalRows(120);
//		//p.setBarNumbers(6);
//		p.setPageNo(13);
//		System.out.println(p.getTotalPages());
//		System.out.println(p.getListNumbers());
//	}
}