我正在创建一个spring boot application，其中任何客户端都可以提交请求，这些请求可以是GET、PUT、POST、DELETE。
但在创建此应用程序时，我收到以下错误：

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

Description:

Parameter 0 of constructor in com.idr.springboot.service.PersonService required a bean of type 'com.idr.springboot.dao.PersonDao' that could not be found.

The following candidates were found but could not be injected:
    - User-defined bean

Action:

Consider revisiting the entries above or defining a bean of type 'com.idr.springboot.dao.PersonDao' in your configuration.

我的应用程序的结构是：

个人道.java

package com.idr.springboot.dao;

import com.idr.springboot.model.Person;
import java.util.UUID;

public interface PersonDao {

    int insertPerson(UUID id, Person person);

    default int insertPerson(Person person) {
        UUID id = UUID.randomUUID();
        return insertPerson(id, person);
    }

}

个人服务.java

package com.idr.springboot.service;

import com.idr.springboot.dao.PersonDao;
import com.idr.springboot.model.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

@Service
public class PersonService {

    private final PersonDao personDao;

    @Autowired
    public PersonService(@Qualifier("fake demo") PersonDao personDao) {
        this.personDao = personDao;
    }

    public int addPerson(Person person) {
        return personDao.insertPerson(person);
    }
}

型
我知道，许多问题与以下错误，已经被问到，但我仍然无法解决这个问题。

Parameter 0 of constructor in com.idr.springboot.service.PersonService required a bean of type 'com.idr.springboot.dao.PersonDao' that could not be found.

我尝试用@Service、@Repository、@Component注解PersonDao.java，但仍然得到相同的错误。
我甚至尝试过这些答案的解决方案：
(1)Parameter 0 of constructor in required a bean of type 'java.lang.String' that could not be found
(2)Spring - Error Parameter 0 of constructor in Service required a bean of type Configuration that could not be found
(3)Parameter 0 of constructor in ..... Spring Boot
但我还是无法解决我的问题。