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超市账单管理系统产品数据新增Servlet实现

news 2025/8/19 13:52:52

package com.test.controller;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.test.dao.BillDao;
import com.test.dao.ProviderDao;
import com.test.dao.UserDao;
import com.test.entity.Bill;
import com.test.entity.Provider;
import com.test.entity.User;
import com.test.service.BillService;
import com.test.service.ProviderService;

public class ProviderInsertServlet extends HttpServlet {

   /**
   *
   */
   private static final long serialVersionUID = 1L;

   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       req.setCharacterEncoding("utf-8");
       try {

           ProviderService Pservice = new ProviderService();
           String providerId = req.getParameter("providerId");
           Provider provider = new Provider();
           if(providerId != null) {
               provider = Pservice.selectContProvider(providerId);
               req.setAttribute("provider", provider);
           }
           req.getRequestDispatcher("/pages/providerAdd.jsp").forward(req, resp);
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

   @Override
   protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       // 设置字符集
       req.setCharacterEncoding("utf-8");
       resp.setCharacterEncoding("utf-8");
       resp.setContentType("text/html;charset=utf-8");
       // 获得用户在浏览器中输入的注册信息
       String providerId = req.getParameter("providerId");
       String providerNo = req.getParameter("proId");
       String providerName = req.getParameter("proName");
       String providerDescribe = req.getParameter("proDesc");
       String providerContacts = req.getParameter("contact");
       String providerYel = req.getParameter("phone");
       String providerLoc = req.getParameter("address");

       // 服务器的验证
       // 验证用户姓名，用户密码，确认密码，联系电话，邮箱是否为空
       // 验证用户姓名不为空
       if (providerNo == null || providerNo.trim().equals("")) {
           req.setAttribute("message", "<script>alert('编号不能为空!');</script>");
           req.getRequestDispatcher("/supermarket/pages/modify.jsp").forward(req, resp);
           return;
       }

       // 验证用户密码不为空
       if (providerName == null || providerName.trim().equals("")) {
           req.setAttribute("message", "<script>alert('名称不能为空!');</script>");
           req.getRequestDispatcher("/supermarket/pages/modify.jsp").forward(req, resp);
           return;
       }

       // 将数据封装到user message实体类的对象中
       Provider provider = new Provider();
       if(providerId != null &&!"".equals(providerId)) {
           provider.setProviderId(Integer.parseInt(providerId));
       }

       provider.setProviderNo(Integer.parseInt(providerNo));
       provider.setProviderName(providerName); // 数量1
       provider.setProviderDescribe(providerDescribe);
       provider.setProviderContacts(providerContacts);
       provider.setProviderTel(providerYel);
       provider.setProviderLoc(providerLoc);

       try {
           // 调用usermessagedao类中名为inset()方法进行用户注册操作，并获得注册是否成功
           if(providerId != null &&!"".equals(providerId)) {
               ProviderDao dao = new ProviderDao();
               int update = dao.update(provider);
               if (update > 0) {
                   HttpSession session=req.getSession(true);
                   req.setAttribute("message", "<script>alert('修改成功!');</script>");
                   resp.sendRedirect(resp.encodeRedirectURL("/supermarket/selectprovider"));
               } else {
                   req.setAttribute("message", "<script>alert('修改失败!');</script>");
                   req.getRequestDispatcher("/supermarket/provideradd").forward(req, resp);
               }
           }else {
               ProviderDao dao = new ProviderDao();
               int insert = dao.insert(provider);
               if (insert > 0) {
                   HttpSession session=req.getSession(true);
                   req.setAttribute("message", "<script>alert('添加成功!');</script>");
                   resp.sendRedirect(resp.encodeRedirectURL("/supermarket/selectprovider"));
               } else {
                   req.setAttribute("message", "<script>alert('添加失败!');</script>");
                   req.getRequestDispatcher("/supermarket/provideradd").forward(req, resp);
               }
           }

       } catch (Exception e) {
           e.printStackTrace();
           resp.sendRedirect("error.html");
       }
   }