原因：NoSuchBeanDefinitionException：xxx类型的合格bean至少应包含1个符合自动装配候选条件的bean。 [英] Caused by: NoSuchBeanDefinitionException: No qualifying bean of type xxx expected at least 1 bean which qualifies as autowire candidate

问题描述

以下代码如下：

package far.botshop.backend.controller;

/**
 */
import java.util.logging.Logger;

import far.botshop.backend.storage.StorageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class FileUploadController {

    private final StorageService storageService;

    @Autowired
    public FileUploadController(StorageService storageService) {
        this.storageService = storageService;
    }

并创建以下类：

package far.botshop.backend.storage;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties("storage")
public class StorageProperties {
    /**
     * Folder location for storing files
     */
    private String location = "upload-dir";

    public String getLocation() {
        return location;
    }

    public void setLocation(String location) {
        this.location = location;
    }

}

我相信应该很容易找到StorageProperties ，但由于某种原因，我遇到此错误：

I believe StorageProperties should be easily found, but for some reason I'm getting this error:

UnsatisfiedDependencyException：创建名称为
'fileSystemStorageService'的bean时出错文件
[/home/x/workspace/botshop-backend-java/target/classes/far/botshop/backend/storage/FileSystemStorageService.class]：
通过构造函数参数0表示的不满意依赖性；
嵌套异常是
org.springframework.beans.factory.NoSuchBeanDefinitionException：没有
个类型为
的合格Bean可以使用 far.botshop.backend.storage.StorageProperties类型：预期为
至少有1个可以成为自动装配候选者的bean。

UnsatisfiedDependencyException: Error creating bean with name 'fileSystemStorageService' defined in file [/home/x/workspace/botshop-backend-java/target/classes/far/botshop/backend/storage/FileSystemStorageService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'far.botshop.backend.storage.StorageProperties' available: expected at least 1 bean which qualifies as autowire candidate.

有什么想法吗？

推荐答案

在StorageProperties类上添加@Component注释。

Add @Component Annotation over StorageProperties class.

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