spring boot jpa启动错误Consider defining a bean of type ‘com.example.security.dao.UserDao‘

spring boot 启动类不在根目录整合spring boot jpa启动报错：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-12-02 17:14:08.940 ERROR 3868 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Parameter 0 of constructor in com.example.security.service.UserServiceImpl required a bean of type 'com.example.security.dao.UserDao' that could not be found.


Action:

Consider defining a bean of type 'com.example.security.dao.UserDao' in your configuration.

Disconnected from the target VM, address: '127.0.0.1:52540', transport: 'socket'

Process finished with exit code 1

解决方法：
1、需要在启动类加上以下注解
@EnableJpaRepositories(basePackages = {“com.example.security”})
@EntityScan(basePackages = {“com.example.security”})

/**
 * {@link EnableJpaRepositories} 扫描 @Repository 注解
 * {@link EntityScan} 扫描 @Entity 注解
 * {@link ComponentScan}扫描 @Controller、@Service 注解
 * @author 
 */
@SpringBootApplication
@EnableJpaRepositories(basePackages = {"com.example.security"})
@EntityScan(basePackages = {"com.example.security"})
@ComponentScan({"com.example.security"})
public class BootStartApplication {

    public static void main(String[] args) {
        SpringApplication.run(BootStartApplication .class, args);
    }

}