src/com/lyq/struts/action/SellAction.java

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package com.lyq.struts.action;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

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

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.lyq.dao.MedicineDao;
import com.lyq.dao.SellDao;
import com.lyq.persistence.Medicine;
import com.lyq.persistence.SellDetail;
import com.lyq.persistence.User;
import com.lyq.struts.form.MedicineForm;
import com.lyq.struts.form.SellDetailForm;
/**
 * 销售Action类
 * @author Li Yong Qiang
 */
public class SellAction extends BaseAction {
	//向购物车中添加药品
	public ActionForward order(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		//获取SellDetailForm
		SellDetailForm sdf = (SellDetailForm) form;
		if (sdf != null && sdf.getSellPrice() > 0 && sdf.getMedId() > 0) {
			MedicineDao medDao = new MedicineDao();
			//加载药品信息
			Medicine med = medDao.loadMedicine(sdf.getMedId());
			//如果购买的数量小于库存数量，进行错误处理
			if (med.getMedCount() < sdf.getSellCount()) {
				ActionMessages errors = new ActionMessages();
				ActionMessage message = new ActionMessage("drug.drugCount.error", "");
				errors.add("", message);
				this.saveErrors(request, errors);
				return mapping.findForward("error");
			}
			sdf.setSellTime(new Date());	
			//计算总价
			double sum = sdf.getSellPrice() * sdf.getSellCount();
			sdf.setTotal(sum);
			HttpSession session = request.getSession();
			// 获取订单
			List list = (List) session.getAttribute("order");
			List meds = new ArrayList();	// 实例化一个List对象
			if (list == null) {
				sdf.setId(1);
			} else {
				int i = 1;