The JdbcTemplate class is the main class of the JDBC Core package. The JdbcTemplate (The class internally use JDBC API) helps to eliminate lot of code you write with simple JDBC API (Creating connection, closing connection, releasing resources, handling JDB Exceptions, handle transaction etc.). The JdbcTemplate handles the creation and release of resources, which helps you to avoid common error like forgetting to close connection.- Examples :1. Getting row count from database.int rowCount = this.jdbcTemplate.queryForObject("select count(*) from t_employee", int.class);2. Querying for a String.String lastName = this.jdbcTemplate.queryForObject( "select last_name from t_employee where Emp_Id = ?", new Object[]{377604L}, String.class);3. Querying for ObjectEmployee employee = this.jdbcTemplate.queryForObject( "select first_name, last_name from t_employee where Emp_Id = ?", new Object[]{3778604L}, new RowMapper(){public Employee mapRow(ResultSet rs, int rowNum) throws SQLException {Employee employee = new Employee();employee.setFirstName(rs.getString("first_name"));employee.setLastName(rs.getString("last_name"));return employee;}});4. Querying for N number of objects.List employeeList = this.jdbcTemplate.query("select first_name, last_name from t_employee", new RowMapper() {public Employee mapRow(ResultSet rs, int rowNum) throws SQLException {   Employee employee = new Employee();   employee.setFirstName(rs.getString("first_name"));   employee.setLastName(rs.getString("last_name"));   return employee;}});   _{Your Comment}