showattacksolutionaction.java

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package struts.sample.cap1.sample3.action;

import java.util.ArrayList;

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

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

import struts.sample.cap1.sample3.dao.AttackSolutionDAO;
import struts.sample.cap1.sample3.form.TestForm;
import struts.sample.cap1.sample3.util.Pager;

public class ShowAttackSolutionAction extends Action {
	private static final int PAGE_LENGTH = 5; // 每页显示5条记录

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		try {
			TestForm testform = (TestForm)form;
			/*
			 * //业务逻辑层利用AttackSolutionDAO对象来表现 AttackSolutionDAO
			 * attackSolutionDAO = new AttackSolutionDAO();
			 * 
			 * //返回全部的记录并从setAttribute传递到页面显示 ArrayList arrayList =
			 * (ArrayList)attackSolutionDAO.retrieveAllAttackSolution();
			 * request.setAttribute("allAttackSolution", arrayList);
			 * 
			 * //处理成功返回成功页面 return mapping.findForward("success");
			 */
			int offset = 0;// 翻页时的起始记录所在游标
			int length = PAGE_LENGTH;
			String pageOffset = request.getParameter("pager.offset");
			if (pageOffset == null || pageOffset.equals("")) {
				offset = 0;
			} else {
				offset = Integer.parseInt(pageOffset);
			}

			// 业务逻辑层利用AttackSolutionDAO对象来表现
			AttackSolutionDAO attackSolutionDAO = new AttackSolutionDAO();

			// 返回全部的记录并从setAttribute传递到页面显示
			ArrayList arrayList = (ArrayList) attackSolutionDAO
					.retrieveOffsetAttackSolution(offset, length);

			int size = attackSolutionDAO.getrows();// 取得总记录数
			String url = request.getContextPath() + "/" + mapping.getPath()
					+ ".do";
			String pagerHeader = Pager.generate(offset, size, length, url); // 分页处理
			testform.setDescription(pagerHeader);
		//	request.setAttribute("pager", pagerHeader);
			request.setAttribute("allAttackSolution", arrayList);

			return mapping.findForward("success");

		} catch (Exception ex) {
			ex.printStackTrace();
			// 捕捉到Exception返回到失败页面
			return mapping.findForward("failure");
		}
	}
}