Question

i’m gonna create class that will operate on database. The class will have functions addRecord(), getAllRecords(), stuff like that. I’m looking for a good approach to design the class. Should i have to:
1) create new Connection for every function. Like this:

void readRecords(){
    try {
        Connection con = DriverManager.getConnection (connectionURL);

        Statement stmt = con.createStatement();

        ResultSet rs = stmd.executeQuery("select moviename, releasedate from movies");

        while (rs.next())
            System.out.println("Name= " + rs.getString("moviename") + " Date= " + rs.getString("releasedate");
    }
    catch (SQLException e) {
        e.printStackTrace();
    }
    catch (Exception e) {
        e.printStackTrace();
    }
    finally {
        con.close();
    }
}

or

2) it’s better to have one connection as a memeber variable

class MyClass{
     private  Connection con;

     public MyClass(){
          con = DriverManager.getConnection (connectionURL);
     }
}

and create just the statement for every function.

3) or something else…

Answer 1

If there are frequent regular jdbc calls, then use a database connection pool.