forstockwarrantviewaction.java

hibernate应用测试,初学hibernate 的会员可以看看.

package com.action;

import org.apache.struts.action.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.SQLException;

import com.tool.pagetool.Page;
import javax.servlet.http.HttpSession;
import com.tool.QueryStrCreator;
import com.tool.pagetool.PageTool;
import com.tool.pagetool.PageToolBuilder;
import com.bean.ForStockWarrantView;
import com.dao.ForstockwarrantViewDAO;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class ForStockWarrantViewAction extends Action {
    public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception {
        request.setCharacterEncoding("gb2312");
        response.setContentType("text/html;charset=gb2312");
        ForStockWarrantView forStockWarrant=(ForStockWarrantView)form;
        String flag = request.getParameter("flag");
        ActionErrors actionErrors = new ActionErrors();
        String target = null;
        if(flag.equals("showAllForCreate")){
            initPage(request,flag);
            target="allForCreateWarrant";
        }else if(flag.equals("forSelect")){
            initPage(request,"forSelect");
            target="allForCreateWarrant";
        }
        return mapping.findForward(target);
    }

    //初始化并获得分页
    private Page initPage(HttpServletRequest request,String flag) {
        String currentPageStr = request.getParameter("currentPage");
        String queryStr = null;
        if(flag.equals("forSelect")){
            queryStr = QueryStrCreator.create("selectForCreateStockWarrant", request);
        }
        int currentPage = 1; //当前页码
        int size = 20; //每页的记录数

        try { //防止从地址栏直接输入非法页码
            if (currentPageStr != null)
                currentPage = new Integer(
                        currentPageStr).intValue();
        } catch (Exception e) {
            e.printStackTrace();
        }

        //处理分页
        //会话中是否已有分页生成工具
        PageTool pageTool = null;
        HttpSession session = request.getSession();
        pageTool = (PageTool) session.getAttribute("forStockWarrantPageTool"); //有，则直接拿来用
        if (pageTool == null) { //没有，则新建，并放进会话中，以备下次用
            pageTool = PageToolBuilder.builder(new ForstockwarrantViewDAO());
            session.setAttribute("forStockWarrantPageTool", pageTool);
        }
        //由分页工具生成分页
        Page page = null;
        try {
            if (flag.equals("forSelect")){ //查询时的分页，是否需要查询条件
                page = pageTool.createPage(currentPage, size, queryStr);
            }else{//其它非查询的分页
                page = pageTool.createPage(currentPage, size);
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        //将分页放进请求中，分发到下一个页面显示
        if(flag.equals("showAllForCreate") || flag.equals("forSelect")){
            request.setAttribute("allForCreateStockWarrant", page);
        }else request.setAttribute("allForCreateStockWarrant", page);
        return page;
    }
}