pageraction.java

该系统实现了网上购物及书店管理

package action;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import java.io.*;
import java.util.ArrayList;

import bean.*;

import db.CustomerOperation;

public class PagerAction extends Action {
	/**
	 * 覆盖Action的execute（）方法
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		// 从request中取得page属性
		String page = request.getParameter("page");
		// 从request中取得TypeId属性
		String bookTypeId = request.getParameter("TypeId");
		// 从request中取得bookStep属性
		String bookStep = request.getParameter("bookStep");
		// 创建CustomerOperation对象
		db.CustomerOperation md = new CustomerOperation();
		int countPage = 0;
		if (bookTypeId != null) {
			// 通过CustomerOperation对象取得页码
			countPage = md.getPageCount(1, 6, Integer.parseInt(bookTypeId),
					Integer.parseInt(bookStep));
			// 通过CustomerOperation对象取得图书信息
			ArrayList bookList = md.getPageData(1, 6, Integer
					.parseInt(bookTypeId), Integer.parseInt(bookStep));
			// 将查询结果存入到request中
			request.setAttribute("bookList", bookList);
			request.setAttribute("page", 1);
			request.setAttribute("TypeId", bookTypeId);
			request.setAttribute("countPage", countPage);
			request.setAttribute("bookStep", bookStep);
		}

		if (request.getParameter("next") != null) {
			String flage = request.getParameter("next");
			if (flage.equals("true")) {
				// 通过CustomerOperation对象取得页码
				countPage = md.getPageCount(1, 6, Integer.parseInt(bookTypeId),
						Integer.parseInt(bookStep));
				// 通过CustomerOperation对象取得图书信息
				ArrayList bookList = md.getPageData(Integer.parseInt(page), 6,
						Integer.parseInt(bookTypeId), Integer
								.parseInt(bookStep));
				// 将查询结果存入到request中
				request.setAttribute("bookList", bookList);
				request.setAttribute("page", page);
				request.setAttribute("TypeId", bookTypeId);
				request.setAttribute("countPage", countPage);
				request.setAttribute("bookStep", bookStep);
			} else {
				// 通过CustomerOperation对象取得页码
				countPage = md.getPageCount(1, 6, Integer.parseInt(bookTypeId),
						Integer.parseInt(bookStep));
				// 通过CustomerOperation对象取得图书信息
				ArrayList bookList = md.getPageData(Integer.parseInt(page), 6,
						Integer.parseInt(bookTypeId), Integer
								.parseInt(bookStep));
				// 将查询结果存入到request中
				request.setAttribute("bookList", bookList);
				request.setAttribute("page", page);
				request.setAttribute("TypeId", bookTypeId);
				request.setAttribute("countPage", countPage);
				request.setAttribute("bookStep", bookStep);

			}
		}

		if (page != null) {
			if (page.equals("frest")) {
				// 通过CustomerOperation对象取得页码
				countPage = md.getPageCount(1, 6, Integer.parseInt(bookTypeId),
						Integer.parseInt(bookStep));
				// 通过CustomerOperation对象取得图书信息
				ArrayList bookList = md.getPageData(1, 6, Integer
						.parseInt(bookTypeId), Integer.parseInt(bookStep));
				// 将查询结果存入到request中
				request.setAttribute("bookList", bookList);
				request.setAttribute("page", 1);
				request.setAttribute("TypeId", bookTypeId);
				request.setAttribute("countPage", countPage);
				request.setAttribute("bookStep", bookStep);
			}
			if (page.equals("last")) {
				// 通过CustomerOperation对象取得页码
				countPage = md.getPageCount(1, 6, Integer.parseInt(bookTypeId),
						Integer.parseInt(bookStep));
				// 通过CustomerOperation对象取得图书信息
				ArrayList bookList = md.getPageData(countPage, 6, Integer
						.parseInt(bookTypeId), Integer.parseInt(bookStep));
				// 将查询结果存入到request中
				request.setAttribute("bookList", bookList);
				request.setAttribute("page", countPage);
				request.setAttribute("TypeId", bookTypeId);
				request.setAttribute("countPage", countPage);
				request.setAttribute("bookStep", bookStep);

			}
		}

		return mapping.findForward("list");
	}
}