Просмотр исходного текста страницы Программа на Java для заполнения БД

<pre>
package ru.aftu;

public class Sample2 {
   public static final String[] REGIONS = {"MSK", "EKB", "SPB"};
   public static final int SHOP_PER_REGION=3;

   public static final int SELLERS_PER_SHOP=3;

   public static final String[] FIRST_NAMES = {"Anna", "Maria",
"Elena", "Alexandra", "Viktoria", "Irina", "Alena"};

   public static final String[] LAST_NAMES = {"Ivanova", "Petrova",
"Sidorova", "Kuznetsova", "Lebedeva", "Zaiceva", "Medvedeva"};

   public static final String[] SEQUENCES = {"item_id_seq",
"receipt_id_seq", "seller_id_seq", "shop_id_seq"};

   public static final String[][] ITEMS =
{{"Danone","Youghurt"},{"Valio","Youghurt"}, {"Valio", "Butter"},
{"Pork", "Meat"}, {"Beef", "Meat"}};

   public static final int RECEIPT_COUNT=1500;

   public static final int CLIENT_COUNT=100;

   public static void main(String[] args) {

     for (int i =0; i<SEQUENCES.length; i++) {
         System.out.println("SELECT setval('"+SEQUENCES[i]+"', 1, false);");
     }

     System.out.println("TRUNCATE TABLE shop CASCADE;");
     System.out.println("TRUNCATE TABLE item CASCADE;");

     for (int i=0; i < REGIONS.length; i++) {
         for (int j =0; j < SHOP_PER_REGION; j++) {
           System.out.println("INSERT INTO shop (region) values ('"+
REGIONS[i] + "');");
         }
     }

     int shop_count = REGIONS.length * SHOP_PER_REGION;

     for (int i = 0; i < shop_count; i++) {
         for (int j = 0; j < SELLERS_PER_SHOP; j++) {
             System.out.println("INSERT INTO seller(name, shop_id)
VALUES ('"+getName(i * SELLERS_PER_SHOP + j)+"', "+(i+1)+");");
         }
     }

     int seller_count =shop_count * SELLERS_PER_SHOP;

     for (int i=0; i< ITEMS.length; i++) {
         System.out.println("INSERT INTO item (name, type, price)
VALUES ('"+ITEMS[i][0]+"','"+ITEMS[i][1]+"',"+ITEMS[i][0].length()+");");
     }

     // checks generation

     for (int i = 0; i < RECEIPT_COUNT; i++) {
         // card, seller, time
         System.out.println("INSERT INTO receipt(discount_card,
seller_id, time) VALUES ('"+rand(CLIENT_COUNT)+"',
"+rand(seller_count)+", current_timestamp);");

         for (int j = 0; j < ITEMS.length; j++) {
             int count = rand(3) - 1;

             if (count > 0) {
                 System.out.println("INSERT INTO receipt_item
(receipt_id, item_id, amount) VALUES ("+(i+1)+", "+(j+1)+",
"+count+");");
             }
         }
     }
   }

   private static int rand(int count) {
       return (int)Math.floor(Math.random() * count) + 1;
   }

   private static String getName(int i) {
       return FIRST_NAMES[i % FIRST_NAMES.length] + " " + LAST_NAMES[
(i / FIRST_NAMES.length) % LAST_NAMES.length ];
   }
}
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