Error Geek

A Simple DAO class extends JdbcDaoSupport, but, unable to inject or @autowired a “dataSource”, the method setDataSource is final, can’t override. Solution To quickly fix it, uses  @PostConstruct  to inject the  dataSource  like this : @Repository public class UserDetailsDaoImpl extends JdbcDaoSupport implements UserDetailsDao { @Autowired private DataSource dataSource ; @PostConstruct private void initialize ( ) { setDataSource ( dataSource ) ; } } Alternatively, create an own implementation of  JdbcDaoSupport  class, and do whatever you want. Dive inside the source code of  JdbcDaoSupport , it’s just a simple helper class to create a  jdbcTemplate . Source :-  https://www.mkyong.com/spring/how-to-autowire-datasource-in-jdbcdaosupport/