pageresultset.java

网上商店 新增功能： 1

package netstore.framework.util;

import java.util.*;

/**
 * <p>
 * Title: PageResultSet
 * </p>
 * 
 * <p>
 * Description:分页类
 * </p>
 * 
 * <p>
 * Copyright: Copyright (c) 2004
 * </p>
 * 
 * <p>
 * Company:youngor-studio(http://www.54youngor.com)
 * </p>
 * 
 * @author:伍维波
 * @version 1.0
 */
public class PageResultSet {

	/**
	 * 当前页
	 */
	private int curPage;

	/**
	 * 每页显示的记录数
	 */
	private int pageSize;

	/**
	 * 记录行数，查询后的总记录数
	 */
	private int rowsCount;

	/**
	 * 页数
	 */
	private int pageCount;
	
	
	public PageResultSet(int rowcnt) {
		this.curPage = 1;
		this.pageSize = 10;
		this.rowsCount = rowcnt;
		this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
	}

	public PageResultSet(int rowcnt, int curPage) {
		this.curPage = curPage;
		this.pageSize = 10;
		this.rowsCount = rowcnt;
		this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
	}

	public PageResultSet(int rowcnt, int curPage, int pageSize) {
		this.curPage = curPage;
		this.pageSize = pageSize;
		this.rowsCount = rowcnt;
		this.pageCount = (int) Math.ceil((double) rowsCount / pageSize);
	}

	/**
	 * getCurPage:返回当前的页数
	 * 
	 * @return int
	 */
	public int getCurPage() {
		return curPage;
	}

	/**
	 * getPageSize：返回分页大小
	 * 
	 * @return int
	 */
	public int getPageSize() {
		return pageSize;
	}

	/**
	 * getRowsCount：返回总记录行数
	 * 
	 * @return int
	 */
	public int getRowsCount() {
		return rowsCount;
	}
	
	public void setRowsCount(int RowsCount){
		this.rowsCount = RowsCount;
	}

	/**
	 * getPageCount：返回总页数
	 * 
	 * @return int
	 */
	public int getPageCount() {
		return pageCount;
	}

	/**
	 * 第一页
	 * 
	 * @return int
	 */
	public int first() {
		return 1;
	}

	/**
	 * 最后一页
	 * 
	 * @return int
	 */
	public int last() {
		return pageCount;
	}

	/**
	 * 上一页
	 * 
	 * @return int
	 */
	public int previous() {
		return (curPage - 1 < 1) ? 1 : curPage - 1;
	}

	/**
	 * 下一页
	 * 
	 * @return int
	 */
	public int next() {
		return (curPage + 1 > pageCount) ? pageCount : curPage + 1;
	}

	/**
	 * 第一页
	 * 
	 * @return boolean
	 */
	public boolean isFirst() {
		return (curPage == 1) ? true : false;
	}

	/**
	 * 第一页
	 * 
	 * @return boolean
	 */
	public boolean isLast() {
		return (curPage == pageCount) ? true : false;
	}

	/**
	 * 获取工具条
	 * 
	 * @return String
	 */
	public String getToolBar(String fileName) {
		String temp = "";
		if (fileName.indexOf("?") == -1) {
			temp = "?";
		} else {
			temp = "&";
		}
		String str = "<form method='post' name='frmPage' action='" + fileName
				+ "'>";
		str += "<p align='center'>";
		if (isFirst())
			str += "首页 上一页&nbsp;";
		else {
			str += "<a href='" + fileName + temp + "cur_page=1'>首页</a>&nbsp;";
			str += "<a href='" + fileName + temp + "cur_page=" + (curPage - 1)
					+ "'>上一页</a>&nbsp;";
		}
		if (isLast())
			str += "下一页 尾页&nbsp;";
		else {
			str += "<a href='" + fileName + temp + "cur_page=" + (curPage + 1)
					+ "'>下一页</a>&nbsp;";
			str += "<a href='" + fileName + temp + "cur_page=" + pageCount
					+ "'>尾页</a>&nbsp;";
		}
		str += "&nbsp;共<b>" + rowsCount + "</b>条记录&nbsp;";
		str += "&nbsp;转到<select name='page' onChange=\"location='" + fileName
				+ temp + "cur_page='+this.options[this.selectedIndex].value\">";
		for (int i = 1; i <= pageCount; i++) {
			if (i == curPage)
				str += "<option value='" + i + "' selected>第" + i
						+ "页</option>";
			else
				str += "<option value='" + i + "'>第" + i + "页</option>";
		}
		str += "</select></p></form>";
		return str;
	}

}