springboot多模塊controller訪問的問題

參考 https://blog.csdn.net/qq_25091649/article/details/88429512

 

情況一：在主類直接寫controller接口，能夠訪問到

@SpringBootApplication
@RestController
public class DemoApplication {
	@RequestMapping("/index")
    public String index() {
      
        return "this is index!";
    }


	public static void main(String[] args) {
		//SpringApplication.run(DemoApplication.class, args);
		SpringApplication application = new SpringApplication(DemoApplication.class);
		application.setBannerMode(Mode.OFF);//關閉banner
		application.run(args);
	}

}

情況二：controller類單獨寫，且controller所在目錄低於主類目錄，此時也可以訪問到

　　

情況三：controller類單獨寫，且controller所在目錄不在住類目錄下，此時需要添加注解ComponentScan，里面寫入要掃描的包

 

@ComponentScan(basePackages = {"com.xiao","com.example"})
@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		//SpringApplication.run(DemoApplication.class, args);
		SpringApplication application = new SpringApplication(DemoApplication.class);
		application.setBannerMode(Mode.OFF);//關閉banner
		application.run(args);
	}

}

1、當啟動類和controller在同一類中時，需要在該類上添加注解@Controller；

2、當啟動類和controller分開時，啟動目錄高於controller目錄，啟動類上只有注解@SpringBootApplication；

3、當啟動類和controller分開時，如果啟動類在某個包下，需要在啟動類中增加注解@ComponentScan，配置需要掃描的包名；

 

補充說明：對外的只有主類所在的模塊，所以需要把其它模塊添加到住類所在模塊