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i have a ResultSet method public ResultSet getItemPurchase(String Pid) which return a Data from a database table. similarly i have another method public Resultset getItemSale(String sid). i have called them using a function ResultSet rs1 = getItemPurchase(Pid); and next function is ResultSet rs2 = getItemSale(Pid);

i want to do as following.

 1. while(rs1.next)
 2. {
 3. rs1.getString("Item");
 4.      if(rs1.getString("price")==rs2.getString("price")
 5.        {
 6.          //some code here
 7.        }
 8.      else{
 9. rs1.getDate("Purchase Date");}
 10. rs2.getString("CustomerName");
 11. }

can anybody please help me on this

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1 に答える 1

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2 つのドメイン オブジェクトを作成することをお勧めします。Plain Java オブジェクトは次のようになります。

public class ItemPurchase{
    private String price;

    //setter/getter for price

    private String purchaseDate;
    //setter/getter for purchaseDate
}
public class ItemSale{
  private String price;

    //setter/getter for price

    private String customerName;
    //setter/getter for customerName
}

次のように各結果セットを繰り返しながら、オブジェクトのリストを作成します。

public List createListOfItemPurchased(ResultSet rs){
 List<ItemPurchase> purchaseList=new ArrayList<ItemPurchase>();
 while(rs.next()){
   ItemPurchase purchaseObject=new ItemPurchase();
   purchaseObject.setPrice(rs.getString("price"));
 //fill all required data in it
  purchaseList.add(purchaseObject);
 }
  return purchaseList;
}

同じ方法で salesObjects を設定し、次のように結果を除外するメソッドを作成します。

filter(List purchaseList, List salesList){
  for(ItemPurchase purchaseObj:purchaseList){
    //process the objects according to your requirement
  }
}
于 2011-05-17T06:29:20.907 に答える