orderhelper.java

网络商店

package util;

import model.*;
import java.io.*;
import java.util.*;
import java.sql.Timestamp;
import java.text.*;
import org.apache.commons.lang.StringEscapeUtils;

public class OrderHelper {
  public static String printOrder(Order o) {
    try {
      Integer id = o.getId();
      String user = o.getUser();
      List<OrderItem> items = o.getItems();
      Timestamp created = o.getCreated();
    
      String created_fmt = (created == null) ? "--" :
                       DateFormat.getDateTimeInstance().format(created);

      String output =
       "<table border=\"1\" cellpadding=\"5px\">" 
       + "<tr>" 
       + "<td colspan=\"3\">" 
       + "order id: " + (id != null ? id : "--") 
       + ", user: " + user 
       + "<br />" 
       + "created: " + created_fmt
       + "</td>" 
       + "</tr>" 
       + "<tr><td>product</td> <td>quantity</td> <td>unit price</td></tr>"
       ;

      float total = 0;
      for (OrderItem item: items) {
        float flt_price = item.getPrice().floatValue();
        String 
         fmt_price = NumberFormat.getCurrencyInstance().format(flt_price);
      
        String 
         descrip = ProductsBean.find(item.getProdId()).getDescription();
      
        output +=
          "<tr>"
          + "<td>" + StringEscapeUtils.escapeHtml(descrip) + "</td>"
          + "<td>" + item.getQty() + "</td>"
          + "<td>" + fmt_price + "</td>"
          + "</tr>"
          ;

        total += item.getQty() * flt_price;
      }
    
      String total_fmt = NumberFormat.getCurrencyInstance().format(total);
    
      output +=
        "<tr>"
        + "<td colspan=\"3\">"
        + "total: " + total_fmt
        + "</td>"
        + "</tr>"
        +"</table>" 
      ;
    
      return output;
    }
    catch(Exception x) {
      x.printStackTrace();
      System.out.println("error:" + x.getMessage());
      return "ERROR";
    }
  }
}