Difference Between Spring JDBC Vs Plain JDBC?

Question

What is the main difference between Spring JDBC VS JDBC?

Answer 1

Let me show you some simple example using JDBC:

final Connection connection = ds.getConnection();
try {
    final Statement statement = connection.createStatement();
    try {
        final ResultSet resultSet = statement.executeQuery("SELECT COUNT(*) FROM Orders");
        try {
            resultSet.next();
            final int c = resultSet.getInt(1);
        } finally {
            resultSet.close();
        }
    } finally {
        statement.close();
    }
} finally {
    connection.close();
}

It's much better when try-with-resources though:

try (
        Connection connection = ds.getConnection();
        Statement statement = connection.createStatement();
        ResultSet resultSet = statement.executeQuery("SELECT COUNT(*) FROM Orders");
) {
    resultSet.next();
    final int c = resultSet.getInt(1);
}

Of course you can extract common code and use template method Design Pattern. Effectively you'd reinvent JdbcTemplate:

final int c = new JdbcTemplate(ds).queryForInt("SELECT COUNT(*) FROM Orders");

Also Spring JDBC provides exception translation (no more checked SQLException and differences between databases/dialects) and simple ORM capabilities.