What does JdbcTemplate return?

JdbcTemplate. update() returns number of rows affected – so you not only know that delete/update was sucessfull, you also know how many rows were deleted/updated.

What is JdbcTemplate RowMapper?

RowMapper interface is used by JdbcTemplate for mapping rows of a ResultSet on a per-row basis. Implementations of this interface perform the actual work of mapping each row to a result object. SQLExceptions if any thrown will be caught and handled by the calling JdbcTemplate.

What is MapSqlParameterSource in Java?

public class MapSqlParameterSource extends AbstractSqlParameterSource. SqlParameterSource implementation that holds a given Map of parameters. This class is intended for passing in a simple Map of parameter values to the methods of the NamedParameterJdbcTemplate class.

What is JdbcTemplate?

JdbcTemplate class is the central class in the JDBC core package. It simplifies the use of JDBC and helps to avoid common errors. It executes core JDBC workflow, leaving the application code to provide SQL and extract results.

How does JdbcTemplate query work?

The JdbcTemplate class executes SQL queries, update statements and stored procedure calls, performs iteration over ResultSet s and extraction of returned parameter values. It also catches JDBC exceptions and translates them to the generic, more informative, exception hierarchy defined in the org. springframework.

What is the use of RowMapper?

Interface RowMapper An interface used by JdbcTemplate for mapping rows of a ResultSet on a per-row basis. Implementations of this interface perform the actual work of mapping each row to a result object, but don’t need to worry about exception handling.

Is JdbcTemplate faster than JPA?

At work we use Hibernate JDBCTemplate because it has more flexibility. It also has better performance than JPA because you are not “loading” a lot of unnecessary data into your app. In the JDBCTemplate case, your SQL skills go a long way in giving you exactly what you need at the right speed.

Can we use Hibernate with JdbcTemplate?

Mostly we are using hibernate for normal operations, if there are big queries or heavy operations, we check performance for jdbc and hibernate whichever better we use it. The good point is HibernateTransactionManager works for both (JdbcTemplate, plain jdbc) and hibernate.

Can you inject null and empty string values in Spring?

In Spring dependency injection, we can inject null and empty values. In XML configuration, null value is injected using element.