productsbean.java

网络商店

package model;

import java.util.*;

public class ProductsBean {

  private static List<Product> list = null;

  public static List<Product> findAll() throws Exception {
    if (list == null) {
      list = Products.findAll();
    }
    return list;
  }

  public static void createTable() throws Exception {
    Products.createTable();
    list = null;
  }

  public static void create(Product p) throws Exception {
    Products.create(p);
    list = null;
  }
   public static void updateRecord(int id, String price) throws Exception {
        Products.updateRecord(id, price);
        list = null;
    }
   public static List<Product> getList() throws Exception {
    System.out.println("getList");
    if ( list == null ) 
      list = Products.findAll();
    return list;
  }

  public static Product find(int id) throws Exception {
    return Products.find(id);
  }
  
  public static java.math.BigDecimal findPrice(int id) throws Exception {
    return Products.findPrice(id);
  }
  public static String findDesc(int id) throws Exception {
    return Products.findDesc(id);
  }
}