petscontrol.java

基于mvc的宠物管理系统。servlet+jsp

package com.richard.control;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.richard.service.Factory;
import com.richard.dao.InterfaceOfOwners;
import com.richard.dao.InterfaceOfPets;
import com.richard.dao.InterfaceOfViewOfPets;
import com.richard.dto.*;

public class PetsControl extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setCharacterEncoding("GB2312");
        request.setCharacterEncoding("GB2312");
        response.setContentType(CONTENT_TYPE);
        String param = request.getParameter("param"); //接收param参数，用于判断servlet处理何种操作
        HttpSession objSession = request.getSession();
        if (param != null) {
            if (param.equals("query")) {
                InterfaceOfViewOfPets objViewOfPets = Factory.createViewOfPets();
                String pageNumber = request.getParameter("pageNumber");
                if (pageNumber != null) {
                    if (pageNumber.equals("firstPage")) {
                        ArrayList objArrayList = new ArrayList();
                        objArrayList = objViewOfPets.ViewOfPetsQueryAll(10, 1);
                        objSession.setAttribute("petsTotalPage",
                                                objViewOfPets.totalPages());
                        request.setAttribute("queryResult", objArrayList); //将返回的ArrayList传递给queryemployee.jsp页面
                        request.setAttribute("currentPage", 1);
                        RequestDispatcher objDispatcher = request.
                                getRequestDispatcher(
                                        "context/querypets.jsp");
                        objDispatcher.forward(request, response);

                    } else if (pageNumber.equals("endPage")) {
                        ArrayList objArrayList = new ArrayList();
                        objArrayList = objViewOfPets.ViewOfPetsQueryAll(10,
                                objViewOfPets.totalPages());
                        objSession.setAttribute("petsTotalPage",
                                                objViewOfPets.totalPages());
                        request.setAttribute("queryResult", objArrayList); //将返回的ArrayList传递给queryemployee.jsp页面
                        request.setAttribute("currentPage",
                                             objViewOfPets.totalPages());
                        RequestDispatcher objDispatcher = request.
                                getRequestDispatcher(
                                        "context/querypets.jsp");
                        objDispatcher.forward(request, response);

                    } else {
                         int page=Integer.parseInt(request.getParameter("pageNumber"));
                        ArrayList objArrayList = new ArrayList();
                        objArrayList = objViewOfPets.ViewOfPetsQueryAll(10,
                               page);
                        objSession.setAttribute("petsTotalPage",
                                                objViewOfPets.totalPages());
                        request.setAttribute("queryResult", objArrayList); //将返回的ArrayList传递给queryemployee.jsp页面
                        request.setAttribute("currentPage",
                                             page);
                        RequestDispatcher objDispatcher = request.
                                getRequestDispatcher(
                                        "context/querypets.jsp");
                        objDispatcher.forward(request, response);

                    }
                }
            }

            if(param.equals("update"))
            {
                String id=new String(request.getParameter("updateid").getBytes("ISO8859_1"));
                String petsName=new String(request.getParameter("updatePetsName").getBytes("ISO8859_1"));
                String birthday=new String(request.getParameter("updatePetsBirth").getBytes("ISO8859_1"));
                String types=new String(request.getParameter("updateTypes").getBytes("ISO8859_1"));
                String owners=new String(request.getParameter("updateOwners").getBytes("ISO8859_1"));
                String pageNumber=new String(request.getParameter("pageNumber").getBytes("ISO8859_1"));
                request.setAttribute("petsName",petsName);
                request.setAttribute("birthday",birthday);
                request.setAttribute("types",types);
                request.setAttribute("owners",owners);
                request.setAttribute("pageNumber",pageNumber);
                request.setAttribute("id",id);
                ArrayList ownersArrayList = Factory.createOwners().queryAll(); //获取所有宠物主人的姓名
                request.setAttribute("ownersInfo", ownersArrayList);
                ArrayList typesArrayList = Factory.createTypes().typesQueryAll(); //获取所有宠物类别
                request.setAttribute("typesInfo", typesArrayList);

                RequestDispatcher objDispatcher=request.getRequestDispatcher("context/updatepets.jsp");
                objDispatcher.forward(request,response);

            }

            if(param.equals("delete"))//处理删除事件
            {
                InterfaceOfViewOfPets objViewOfPets = Factory.createViewOfPets();
                int deleteId= Integer.parseInt(request.getParameter("deleteid"));
                int pageNumber=Integer.parseInt(request.getParameter("pageNumber"));
                Pets petsBean=new Pets();
                petsBean.setId(deleteId);
                Factory.createPets().petsDelete(petsBean);
                request.setAttribute("petsTotalPage",
                                                objViewOfPets.totalPages());
                RequestDispatcher objDispatcher=request.getRequestDispatcher("petscontrol?param=query");
                objDispatcher.forward(request,response);
            }




            if (param.equals("querybydetail")) { //按条件查询
                String petsName = new String(request.getParameter("petsname").
                                             getBytes("ISO8859_1")); //字符转换
                String petsType = new String(request.getParameter("petstype").
                                             getBytes("ISO8859_1"));
                String petsOwner = new String(request.getParameter("petsowner").
                                              getBytes("ISO8859_1"));
                String detailpageNumber = request.getParameter(
                        "detailpageNumber");
                if (petsName.equals("") && petsType.equals("") &&
                    petsOwner.equals("")) { //当所有查询条件都为空时则显示所有的资料

                } else {

                    String command = "and pets_name like'%" + petsName +
                                     "%' and types_name like'%" + petsType +
                                     "%' and owners_name like '%" + petsOwner +
                                     "%'";
                    ArrayList objArrayList = new ArrayList();
                    objArrayList = Factory.createViewOfPets().ViewOfPetsQuery(
                            10, 1, command);
                    objSession.setAttribute("petsDetailTotalPage",
                                            Factory.createViewOfPets().
                                            totalPages());
                    request.setAttribute("petsname", petsName);
                    request.setAttribute("petstype", petsType);
                    request.setAttribute("petsowner", petsOwner);
                    request.setAttribute("queryDetailResult", objArrayList); //将返回的ArrayList传递给queryemployee.jsp页面
                    request.setAttribute("currentDetailPage", 1);
                    RequestDispatcher objDispatcher = request.
                            getRequestDispatcher(
                                    "context/querydetailpets.jsp");
                    objDispatcher.forward(request, response);
                }
            }

            if (param.equals("addPets")) { //添加新的宠物资料

                ArrayList ownersArrayList = Factory.createOwners().queryAll(); //获取所有宠物主人的姓名
                request.setAttribute("ownersInfo", ownersArrayList);
                ArrayList typesArrayList = Factory.createTypes().typesQueryAll(); //获取所有宠物类别
                request.setAttribute("typesInfo", typesArrayList);

                RequestDispatcher objDispatcher = request.getRequestDispatcher(
                        "context/addpets.jsp");
                objDispatcher.forward(request, response);

            }

            if (param.equals("addPetsSave")) { //处理新增保存

                String petName = request.getParameter("petName");
                String petsBirthday = request.getParameter("petsBirthday");
                String petsType = request.getParameter("petsType");
                String petsOwner = request.getParameter("petsOwner");
                Pets petsBean = new Pets();
                petsBean.setBirth_date(petsBirthday);
                petsBean.setName(petName);
                petsBean.setType_id(Factory.createTypes().nameForId(petsType));
                petsBean.setOwner_id(Factory.createOwners().nameForId(petsOwner));
                Factory.createPets().petsInsert(petsBean);
                RequestDispatcher objDispatcher = request.getRequestDispatcher(
                        "petscontrol?param=addPets");
                objDispatcher.forward(request, response);

            }
        }
        if (param.equals("querydetail")) {
            String detailpageNumber = request.getParameter("detailpageNumber");
            if (detailpageNumber != null) {
                if (detailpageNumber.equals("firstPage")) { //处理条件查询的翻页事件
                    ArrayList objArrayList = new ArrayList();
                    String command = "and pets_name like'%" +
                                     new String(request.getParameter("petsname").
                                                getBytes("ISO8859_1")) +
                                     "%' and types_name like'%" +
                                     new String(request.getParameter("petstype").
                                                getBytes("ISO8859_1")) +
                                     "%' and owners_name like '%" +
                                     new String(
                                             request.getParameter("petsowner").
                                             getBytes("ISO8859_1")) + "%'";
                    objArrayList = new ArrayList();
                    objArrayList = Factory.createViewOfPets().ViewOfPetsQuery(
                            12, 1, command);
                    objSession.setAttribute("petsDetailTotalPage",
                                            Factory.createViewOfPets().
                                            totalPages());
                    request.setAttribute("queryDetailResult", objArrayList); //将返回的ArrayList传递给queryemployee.jsp页面
                    request.setAttribute("currentDetailPage", 1);
                    request.setAttribute("petsname",
                                         new String(request.
                            getParameter("petsname").
                            getBytes("ISO8859_1")));
                    request.setAttribute("petstype",
                                         new String(request.
                            getParameter("petstype").
                            getBytes("ISO8859_1")));
                    request.setAttribute("petsowner",
                                         new String(request.
                            getParameter("petsowner").
                            getBytes("ISO8859_1")));

                    RequestDispatcher objDispatcher = request.
                            getRequestDispatcher(
                                    "context/querydetailpets.jsp");
                    objDispatcher.forward(request, response);

                }

            }

        }

    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy() {
    }
}