searchproductsaction.java

来自「Spring +Web 的完整 MyEclipse 项目源码,使用者可以作为入门」· Java 代码 · 共 50 行

package org.digitstore.web.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import org.springframework.beans.support.PagedListHolder;
import org.digitstore.service.*;

public class SearchProductsAction extends BaseAction {

    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        ProductManager manager = ManagerFactory.createProductManager();
        if (request.getParameter("search") != null) {
            String keyword = request.getParameter("keyword");
            if (keyword == null || keyword.length() == 0) {
                request
                        .setAttribute("message",
                                "Please enter a keyword to search for, then press the search button.");
                return mapping.findForward("failure");
            } else {
                PagedListHolder productList = new PagedListHolder(manager
                        .searchProductList(keyword.toLowerCase()));
                productList.setPageSize(4);
                request.getSession().setAttribute(
                        "SearchProductsAction_productList", productList);
                request.setAttribute("productList", productList);
                return mapping.findForward("success");
            }
        } else {
            String page = request.getParameter("page");
            PagedListHolder productList = (PagedListHolder) request
                    .getSession().getAttribute(
                            "SearchProductsAction_productList");
            if ("next".equals(page)) {
                productList.nextPage();
            } else if ("previous".equals(page)) {
                productList.previousPage();
            }
            request.setAttribute("productList", productList);
            return mapping.findForward("success");
        }
    }

}