java - 无法找到所需类型的 Bean 中的字段 请考虑在配置中定义该类型的 Bean

Question

我在尝试运行我的应用程序时收到以下错误:

Field edao in com.alon.service.EmployeeServiceImpl required a bean of type 'com.alon.repository.EmployeeRepository' 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 'com.alon.repository.EmployeeRepository' in your configuration.

项目结构:

员工存储库:

package com.alon.repository;

import com.alon.model.Employee;
import org.springframework.stereotype.Repository;
import java.util.List;

@Repository
public interface EmployeeRepository {
    List<Employee> findByDesignation(String designation);
    void saveAll(List<Employee> employees);
    Iterable<Employee> findAll();
}

EmployeeServiceImpl:

package com.alon.service;

import com.alon.model.Employee;
import com.alon.repository.EmployeeRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeRepository edao;

    @Override
    public void saveEmployee(List<Employee> employees) {
        edao.saveAll(employees);
    }

    @Override
    public Iterable<Employee> findAllEmployees() {
        return edao.findAll();
    }

    @Override
    public List<Employee> findByDesignation(String designation) {
        return edao.findByDesignation(designation);
    }
}

我的应用程序:

package com.alon;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

Answer 1

由于您添加了 spring-boot 标签，我猜您正在使用 sprig data jpa。您的存储库接口(interface)应该扩展 org.springframework.data.repository.Repository (标记接口(interface))或其子接口(interface)之一(通常 org.springframework.data.repository.CrudRepository )用于指示 spring 提供存储库的运行时实现，如果这些接口(interface)中的任何一个未扩展，您将得到

bean of type 'com.alon.repository.EmployeeRepository' that could not be found.