电子商务毕业论文 第9页

CD在线商店销售系统设计|电子商务网站毕业设计|电子商务毕业论文 第9页|免费论文
 if (purchaselist == null) { //第一次购买
        purchaselist = new Vector();
        purchaselist.addElement(iList);
      }

      else { // 不是第一次购买
        for (int i = 0; i < purchaselist.size(); i++) {
          allorder itList = (allorder) purchaselist.elementAt(i);
          if (iList.getcdNo() == itList.getcdNo()) {
            itList.setAmount(itList.getAmount() + iList.getAmount());
            purchaselist.setElementAt(itList, i);
            match = true;
            break;
          } //if name matches结束
        } // for循环结束
        if (!match)
          purchaselist.addElement(iList);
      }
      session.setAttribute("shopcar", purchaselist);
      return true;
    }
    /**
     * 修改已经放进购物车的数据
     * @param newrequest
     * @return
     */
    public boolean modiShoper(HttpServletRequest newrequest) {
      request = newrequest;
      String ID = request.getParameter("cdid");
      String Amount = request.getParameter("amount");
      long cdid = 0;
      int amount = 0;
      try {
        cdid = Long.parseLong(ID);
        amount = Integer.parseInt(Amount);
      }
      catch (Exception e) {
        return false;
      }
      if (amount < 1)
        return false;
      session = request.getSession(false);
      if (session == null) {
        return false;
      }
      purchaselist = (Vector) session.getAttribute("shopcar");
      if (purchaselist == null) {
        return false;
      }
      sqlStr = "select leav_number from cd where id=" + cdid;
      try {
        DataBase db = new DataBase();
                  db.connect();
                  stmt = db.conn.createStatement ();

        rs = stmt.executeQuery(sqlStr);
        if (rs.next()) {
          if (amount > rs.getInt(1)) {
            leavecd = rs.getInt(1);
            isEmpty = true;
            return false;
          }
        }
        close();
      }
      catch (SQLException e) {
        return false;
      }
      for (int i = 0; i < purchaselist.size(); i++) {
        allorder itList = (allorder) purchaselist.elementAt(i);
        if (cdid == itList.getcdNo()) {
          itList.setAmount(amount);
          purchaselist.setElementAt(itList, i);
          break;
        } //if name matches结束
      } // for循环结束
      return true;
    }
    /**
     *删除购物车中数据
     * @param newrequest
     * @return
     */
    public boolean delShoper(HttpServletRequest newrequest) {
      request = newrequest;
      String ID = request.getParameter("cdid");
      long cdid = 0;
      try {
        cdid = Long.parseLong(ID);
      }
      catch (Exception e) {
        return false;
      }
      session = request.getSession(false);
      if (session == null) {
        return false;
      }
      purchaselist = (Vector) session.getAttribute("shopcar");
      if (purchaselist == null) {
        return false;
      }

      for (int i = 0; i < purchaselist.size(); i++) {
        allorder itList = (allorder) purchaselist.elementAt(i);
        if (cdid == itList.getcdNo()) {
          purchaselist.removeElementAt(i);
          break;
        } //if name matches结束
      } // for循环结束
      return true;
    }
    /**
     * 提交购物车
     * @param newrequest
     * @return
     * @throws java.lang.Exception
     */
    public boolean payout(HttpServletRequest newrequest) throws Exception {
      op_user opUser=new op_user();
      request = newrequest;
      session = request.getSession(false);
    // System.out.print("f1");
      if (session == null) {
        return false;
      }
      String Userid = (String) session.getAttribute("userid"); //取得用户ID号
      long userid = 0;
      if (Userid == null || Userid.equals("")) {
        isLogin = false;
        return false;
      }
      else {
        try {
          userid = Long.parseLong(Userid);
        }
        catch (NumberFormatException e) {
        //  System.out.print(e.getMessage());
          return false;
        }
      }
751com.cn
      String TotalPrice = request.getParameter("totalprice");
      float payPrice=(Float.parseFloat(TotalPrice))*opUser.getUserRate(Userid);
      long timeInMillis = System.currentTimeMillis();
  //System.out.println("f4");
      sqlStr = "insert into orders (orderId,UserId,SubmitTime,ConsignmentTime,TotalPrice,content,IPAddress,IsPayoff,IsSales) values (";
      orderId=""+timeInMillis;//以系统时间产生位移的订单编号
      sqlStr = sqlStr  + orderId + ",'";
      sqlStr = sqlStr + userid + "',GETDATE(),GETDATE()+7,'";
      sqlStr = sqlStr + payPrice + "','";
      sqlStr = sqlStr + dataFormat.toSql(Content) + "','";
      sqlStr = sqlStr + IP + "',1,1)";
    //  System.out.print(sqlStr);
    //String setIdSql="udate orders set orderid=orderid+id where UserId = " + userid;
      try {
        stmt.execute(sqlStr);
        //stmt.execute(setIdSql);
       // sqlStr = "select max(id) from orders where UserId = " + userid;
       // rs = stmt.executeQuery(sqlStr);

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