超市账单管理系统产品数据新增Servlet实现
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");
?? ??? ?}
?? ?}
}