spring-jdbc

I am collecting data and store this data in a MySQL database using Java. Additionally, I use Maven for building the project, TestNG as a test framework, and Spring-Jdbc for accessing the database. I've implemented a DAO layer that encapsulates the access to the database. Besides adding data using the DAO classes I want to execute some queries which aggregate the data and store the results in some other tables (like materialized views). Now, I would like to write some testcases which check whether the DAO classes are working as they should. Therefore, I thought of using an in-memory database

What is the main difference between Spring JDBC VS JDBC? Tomasz Nurkiewicz 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

When I insert new Date() object using jdbcTemplate to Oracle database, I can see that jdbc driver or Spring jdbcTemplate insert Date using local JVM offset. SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy"); sdf.setTimeZone(TimeZone.getTimeZone("UTC")); Date timeZoneDate = sdf.parse("09-SEP-1987"); For example when I insert Date object created in GMT this result to inserting 08-SEP-1987 in Oracle database if JVM timezone is USA. Anton Neither java.util.Date nor Oracle Date stores timezone information. In your case Jdbc driver converts your date using the JVM timezone. You can use one

After having read this article , I wish to use Spring to stream database query results directly to a JSON response to ensure constant-memory usage (no greedy loading of a List in memory). Similar to what is done in the article with Hibernate, I assembled a greetingRepository object which returns a stream of the database contents based on a JdbcTemplate . In that implementation, I create an iterator over the queried ResultSet , and I return the stream as follows: return StreamSupport.stream(spliterator(), false).onClose(() -> { log.info("Closing ResultSetIterator stream"); JdbcUtils