unitservlet.java~8~

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.domain.UnitVO;
import com.dao.UnitDao;

//计量单位的servlet
public class UnitServlet
    extends HttpServlet {
  private int method;
  private UnitVO vo;
  private UnitDao dao;
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    request.setCharacterEncoding("gb2312");
    vo = new UnitVO();
    dao = new UnitDao();
    method = Integer.parseInt(request.getParameter("method"));
    switch (method) {
      case 0: {
        this.unitSelect(request, response); //全部查询
        break;
      }
      case 1: {
        this.unitInsert(request, response); //添加计量单位信息
        break;
      }
    }
  }

//添加计量单位信息
  public void unitInsert(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    String operate = request.getParameter("operate");
    String url = null;
    if (operate == null) {
      url = "dataUnit/unitInsert.jsp";
    }
    else {
      String number = "noNumber";
      vo.setUnit_number(number);
      vo.setUnit_name(request.getParameter("name"));
      vo.setUnit_remark(request.getParameter("remark"));
      if (dao.unitSelectName(request.getParameter("name")) == null) {
        dao.unitInsert(vo);
        UnitVO unit = dao.unitSelectOne(number);
        dao.unitUpdateNumber(unit.getId(), number);
        request.setAttribute("success", "添加信息成功");
      }
      else {
        request.setAttribute("success", "该名称已经存在");
      }
      url = "dataUnit/success.jsp";
    }
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(url);
    requestDispatcher.forward(request, response);
  }

//全部查询
  public void unitSelect(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    List list=dao.unitSelect();
    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(
        "dataUnit/unitSelect.jsp");
    requestDispatcher.forward(request, response);
  }

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

}