src/common/pager/Pager.java

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package common.pager;

import java.util.List;

public class Pager {
	private int totalRows;//记录总数
	private int pageSize = 10;//设置一页显示的记录数
	private int currentPage;//当前页码
	private int totalPages;//总页数
	private int startRow;//当前页码开始记录数
	private List elements;//记录列表
	
	public Pager() {
	}
	//构造pager对象
	public Pager(int _totalRows) {
		totalRows = _totalRows;
		totalPages=totalRows/pageSize;
		int mod=totalRows%pageSize;
		if(mod>0){
			totalPages++;
		}
		currentPage = 1;
		startRow = 0;
	}
	
	//首页
	public void first() {
		currentPage = 1;
		startRow = 0;
	}
	//上一页
	public void previous() {
		if (currentPage == 1) {
			return;
		}
		currentPage--;
		startRow = (currentPage - 1) * pageSize;
	}
	//下一页
	public void next() {
		if (currentPage < totalPages) {
			currentPage++;
		}
		startRow = (currentPage - 1) * pageSize;
	}
	//尾页
	public void last() {
		currentPage = totalPages;
		startRow = (currentPage - 1) * pageSize;
	}
	//刷新pager对象
	public void refresh(int _currentPage) {
		currentPage = _currentPage;
		if (currentPage > totalPages) {
			last();
		}
	}
	
	public int getStartRow() {