// AppConfig.java
@Configuration
public class AppConfig {
@Bean
public DataSource dataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/mydb");
dataSource.setUsername("username");
dataSource.setPassword("password");
return dataSource;
}
@Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
@Bean
public MyService myService(JdbcTemplate jdbcTemplate) {
return new MyServiceImpl(jdbcTemplate);
}
}
// Main.java
public class Main {
public static void main(String[] args) {
ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
MyService myService = context.getBean(MyService.class);
myService.doSomething();
}
}
// MyService.java
public interface MyService {
void doSomething();
}
// MyServiceImpl.java
public class MyServiceImpl implements MyService {
private JdbcTemplate jdbcTemplate;
public MyServiceImpl(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public void doSomething() {
// ...
}
}
