java - @SpringBootApplication注解的含义

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class,
                                  DataSourceTransactionManagerAutoConfiguration.class })
                              
                             

注解中，exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class 作用是什么？

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
    return application.sources(Main.class);
}

这个代码是干吗的？