creditservlet.java

销售管理系统 随着我国国民经济的持续发展

package com.webtier;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.dao.CreditDao;
import com.domain.CreditVO;

public class CreditServlet
    extends HttpServlet {
  private int method;
  private CreditVO vo;
  private CreditDao dao;
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    request.setCharacterEncoding("gb2312");
    vo = new CreditVO();
    dao = new CreditDao();
    method = Integer.parseInt(request.getParameter("method"));
   switch (method) {
       case 0: {
         this.creditSelect(request, response); //全部查询
         break;
       }
       case 1: {
         this.creditInsert(request, response); //添加计量单位信息
         break;
       }
       case 2: {
         this.creditDelete(request, response); //删除操作
         break;
       }
       case 3: {
         this.creditSelectOne(request, response); //查询要修改信息的操作
         break;
       }
       case 4:{
         this.creditUpdate(request,response);//修改操作
         break;
       }
     }
  }

//修改操作
  public void creditUpdate(HttpServletRequest request,
                           HttpServletResponse response) throws
      ServletException, IOException {
    vo.setCredit_number(request.getParameter("number"));
    vo.setCredit_name(request.getParameter("name"));
    vo.setCredit_remark(request.getParameter("remark"));
    dao.creditUpdate(vo);
    request.setAttribute("success", "修改信息成功");
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataCredit/success.jsp");
    requestDispatcher.forward(request, response);

  }

//查询要修改信息的操作
  public void creditSelectOne(HttpServletRequest request,
                            HttpServletResponse response) throws
      ServletException, IOException {
    request.setAttribute("credit",
                         dao.creditSelectOne(request.getParameter("number")));
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataCredit/creditUpdate.jsp");
    requestDispatcher.forward(request, response);
  }

//删除操作
  public void creditDelete(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    dao.creditDelete(Integer.valueOf(request.getParameter("id")));
    request.setAttribute("success", "删除信息成功");
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataCredit/success.jsp");
    requestDispatcher.forward(request, response);
  }

//添加计量单位信息
  public void creditInsert(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    String operate = request.getParameter("operate");
    String url = null;
    if (operate == null) {
      url = "dataCredit/creditInsert.jsp";
    }
    else {
      String number = "noNumber";
      vo.setCredit_number(number);
      vo.setCredit_name(request.getParameter("name"));
      vo.setCredit_remark(request.getParameter("remark"));
      if (dao.creditSelectName(request.getParameter("name")) == null) {
        dao.creditInsert(vo);
        CreditVO credit = dao.creditSelectOne(number);
        dao.creditUpdateNumber(credit.getId(), number);
        request.setAttribute("success", "添加信息成功");
      }
      else {
        request.setAttribute("success", "该名称已经存在");
      }
      url = "dataCredit/success.jsp";
    }
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(url);
    requestDispatcher.forward(request, response);
  }

//全部查询
  public void creditSelect(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    List list = dao.creditSelect();
    int pageNumber = list.size(); //计算出有多少条记录
    int maxPage = pageNumber; //计算有多少页数
    String number = request.getParameter("i");
    if (maxPage % 5 == 0) {
      maxPage = maxPage / 5;
    }
    else {
      maxPage = maxPage / 5 + 1;
    }
    if (number == null) {
      number = "0";
    }
    request.setAttribute("number", String.valueOf(number));
    request.setAttribute("maxPage", String.valueOf(maxPage));
    request.setAttribute("pageNumber", String.valueOf(pageNumber));
    request.setAttribute("list", list);
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataCredit/creditSelect.jsp");
    requestDispatcher.forward(request, response);
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    doGet(request, response);
  }
}