Java General Error On Insert…???

Question

I am trying to do an Insert, Update and Delete on a table in MS Access. Everything works fine

for a SELECT statement. But when doing the o

Answer 1

Edit :

You try to Insert your Student Primary Key, if it's an Identity column, it will not work.

You need to prepare your statement like this :

PreparedStatement ps = con.prepareStatement("INSERT INTO Student(Field1,Field2,Field3,Field4,Field5,Field6,Field7) VALUES (?, ?, ?, ?, ?, ?, ?)");

Without your Primary Key set, the DB will do it for you.

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Original post :

There is a kind of similar question on StackOverflow.

You won't see any result from INSERT queries with Access until you close your Connection properly.

Your code doesn't close any resources, which will surely bring you grief. Call the close methods (in reverse order if there are more than one) in a finally block.

Here is a class DataBaseUtils to help you if needed.

public class DatabaseUtils
{
    public static Connection createConnection(String driver, String url, String username, String password) 
        throws ClassNotFoundException, SQLException
    {
        Class.forName(driver);

        return DriverManager.getConnection(url, username, password);
    }

    public static void close(Connection connection)
    {
        try
        {
            if (connection != null)
            {
                connection.close();
            }
        }
        catch (SQLException e)
        {
            e.printStackTrace(e);
        }
    }

    public static void close(Statement statement)
    {
        try
        {
            if (statement != null)
            {
                statement.close();
            }
        }
        catch (SQLException e)
        {
            e.printStackTrace(e);
        }
    }

    public static void close(ResultSet rs)
    {
        try
        {
            if (rs != null)
            {
                rs.close();
            }
        }
        catch (SQLException e)
        {
            e.printStackTrace(e);
        }
    }
}