Can you explain the differences between standard JDBC and using JdbcTemplate when working with databases?

JDBC is the standard Java API for working with databases, which requires developers to manage connections, prepared statements, exception handling, and resource release on their own.

JdbcTemplate is a class from the Spring Framework that simplifies JDBC operations by wrapping standard operations and automatically managing resources.

Main differences:

• Resource management: JdbcTemplate automatically opens and closes connections, statements, and result sets, reducing the risk of leaks.

• Exception handling: JdbcTemplate converts SQLException into unchecked DataAccessException, simplifying error handling.

• Code simplification: JdbcTemplate provides convenient methods for executing queries, updates, and result mapping, reducing boilerplate code.

Example using JdbcTemplate:

String sql = "SELECT name FROM users WHERE id = ?";
String name = jdbcTemplate.queryForObject(sql, new Object[]{userId}, String.class);

Standard JDBC code would be longer, with explicit creation of PreparedStatement, ResultSet, and resource closing.