java - 如何解决启动ApplicationContext时出错

Question

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-07-07 12:52:59.026 ERROR 10816 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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

Description:

Field authorDao in com.Jpa.Library.libraryItem.LibraryItemApplication required a bean of type 'com.Jpa.Library.libraryItemDao.AuthorDao' 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.Jpa.Library.libraryItemDao.AuthorDao' in your configuration.

这是我的代码:

package com.Jpa.Library.libraryItem;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import com.Jpa.Library.libraryItemDao.AuthorDao;
import com.Jpa.Library.libraryItemDao.LibraryItemDao;
import com.Jpa.Library.libraryItemDao.RackDao;
import com.Jpa.Library.libraryItemDao.RackItemDao;
import com.Jpa.Library.libraryItemEntity.LibraryItem;

@SpringBootApplication
public class LibraryItemApplication implements ApplicationRunner{

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

    @Autowired
    private AuthorDao authorDao;

    @Autowired
    private LibraryItemDao libraryItemDao;

    @Autowired
    private RackDao rackDao;

    @Autowired
    private RackItemDao rackItemDao;

    @Override
    @Transactional
    public void run(ApplicationArguments args) throws Exception {
    LibraryItem libraryitem = libraryItemDao.findByTitle("Fifty Shades of Gray");
    System.out.println(libraryitem);
    }
}

Answer 1

A) 仔细阅读错误消息

B) “考虑在您的配置中定义“com.Jpa.Library.libraryItemDao.AuthorDao”类型的 bean。”