required a bean of type '' that could not be found

错误码：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-02-04 10:44:15.629 ERROR 9471 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field testservice in org.minp.vhrsstest.HelloController required a bean of type 'org.minp.vhr.service.test.Testservice' that could not be found.

The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.minp.vhr.service.test.Testservice' in your configuration.


Process finished with exit code 1

看错误信息的意思是spring找不到这个bean，也就是扫描不到

处理方式分两种

1. 保证springboot主启动类要在所有bean的同级或者上级packge
2. 通过 scanBasePackge=“org.minp” 指定扫描package
   举例
   项目分为三个模块，mapper，service，web，分别由maven管理
   dao

package org.minp.vhr.mapper;
public interface UserMapper {
	void addUser(User user);
}

service

package org.minp.vhr.service;
@Service
public class Helloservice {

	@Autowired
	UserMapper usermapper;
	
    public void helloService(){
        System.out.println("helloService");
    }
    public void addUserService(User user) {
    	usermapper.addUser(user)
    }
}

web

package org.minp.vhr.start;
@MapperScan(basePackages = "org.minp.vhr.mapper")
@SpringBootApplication(scanBasePackages = "org.minp")
public class VhrssTestApplication {
    public static void main(String[] args) {
        SpringApplication.run(VhrssTestApplication.class, args);
    }
}

@RestController
public class HelloController {
    @Autowired
    Helloservice helloservice;
    @GetMapping("/hello")
    public String hello() {
        helloservice.helloService();
        System.out.println("hello Controller");
        return "hello";
    }
	
	@PostMapping("/adduser")
	public void adduser(){
		User user = new User();
		user.setId = "1";
		user.setName = "minp";
		helloservice.addUserService(user);
		System.out.println("add user success");
	}
}

scanBasePackge 可添加多个package进行扫描
scanBasePackge={“org.minp.vhr1”,“org.minp.vhr2”,“org.minp.vhr3”}