Spring 尝试@Autowire@组件时出现异常

当我尝试自动连接组件时，会出现NoSuchBeanDefinition异常

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.github.robertobatts.restapi.repository.OrderRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

这是我尝试自动连线的代码：

@CrossOrigin(origins = "*")
@RestController
@RequestMapping(value = "/order", produces = "application/json")
public class OrderController {

    @Autowired
    private OrderRepository repository;

...

}

这是组件：

@Component
public class OrderRepository extends InMemoryRepository<Order> {

    @Override
    protected void updateIfExists(Order original, Order updated) {
        original.setDescription(updated.getDescription());
        original.setCostInCents(updated.getCostInCents());
        original.setComplete(updated.isComplete());
    }

}

---

请将您的

@springbootplication

向上移动一个包级别

注释本身包含

@ComponentScan

和

如果未定义特定的包，将从声明此注释的类的包中进行扫描

资料来源：

---

在

34ced93

上的这些更改使用

mvn clean spring boot:run

为我提供了预期的标准输出行

diff --git a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
similarity index 86%
rename from src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java
rename to src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
index bc01db5..affb928 100644
--- a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java
+++ b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
@@ -1,3 +1,3 @@
-package com.github.robertobatts.restapi.main;
+package com.github.robertobatts.restapi;

 import org.springframework.boot.SpringApplication;
diff --git a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
index b356e74..554610a 100644
--- a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
+++ b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
@@ -1,4 +1,6 @@
 package com.github.robertobatts.restapi.repository;

+import javax.annotation.PostConstruct;
+
 import org.springframework.stereotype.Repository;

@@ -8,4 +10,9 @@ import com.github.robertobatts.restapi.domain.Order;
 public class OrderRepository extends InMemoryRepository<Order> {

+       @PostConstruct
+       private void test() {
+               System.out.println("OrderRepository ready.");
+       }
+
        @Override
        protected void updateIfExists(Order original, Order updated) {

diff--git a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
相似性指数86%
从src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java重命名
重命名为src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
索引bc01db5..affb928 100644
---a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java
+++b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
@@ -1,3 +1,3 @@
-包com.github.robertobatts.restapi.main；
+包com.github.robertobatts.restapi；
导入org.springframework.boot.SpringApplication；
diff--git a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
索引b356e74..554610a 100644
---a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
+++b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
@@ -1,4 +1,6 @@
包com.github.robertobatts.restapi.repository；
+导入javax.annotation.PostConstruct；
+
导入org.springframework.stereotype.Repository；
@@-8,4+10,9@@import com.github.robertobatts.restapi.domain.Order；
公共类OrderRepository在MemoryRepository中扩展{
+@施工后
+专用无效测试（）{
+System.out.println（“OrderRepository ready.”）；
+       }
+
@凌驾
受保护的无效更新存在（订单原始，订单更新）{

OrderController的包是什么？请显示主要的应用程序代码。可能您尚未配置要扫描的包，并且包布局不符合标准的spring引导布局，因此未发现您的bean。如果您的应用程序不在包的根目录中，则必须指定用于扫描的文件夹应该扫描e组件。你能提供项目的树状结构吗？我编辑了添加包结构的帖子查看我的包结构。SpringBootApplication已经在其他e包的基础上升级了，但仍然没有work@robertobatts请从

com.github.robertoba移动
RestApiExampleApplication
tts.restapi.main

到

com.github.robertobatts.restapi

它已经在那里了。我以前发布过github代码，但我忘记提交它。它不起作用anyway@robertobatts您是否也重构了Java文件中的包名？我将自己试一试。@robertobatts我添加了我的工作差异。请试一试。我还将推荐请使用最新版本而不是构建快照，但这可能不是问题所在。

diff --git a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
similarity index 86%
rename from src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java
rename to src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
index bc01db5..affb928 100644
--- a/src/main/java/com/github/robertobatts/restapi/main/RestApiExampleApplication.java
+++ b/src/main/java/com/github/robertobatts/restapi/RestApiExampleApplication.java
@@ -1,3 +1,3 @@
-package com.github.robertobatts.restapi.main;
+package com.github.robertobatts.restapi;

 import org.springframework.boot.SpringApplication;
diff --git a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
index b356e74..554610a 100644
--- a/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
+++ b/src/main/java/com/github/robertobatts/restapi/repository/OrderRepository.java
@@ -1,4 +1,6 @@
 package com.github.robertobatts.restapi.repository;

+import javax.annotation.PostConstruct;
+
 import org.springframework.stereotype.Repository;

@@ -8,4 +10,9 @@ import com.github.robertobatts.restapi.domain.Order;
 public class OrderRepository extends InMemoryRepository<Order> {

+       @PostConstruct
+       private void test() {
+               System.out.println("OrderRepository ready.");
+       }
+
        @Override
        protected void updateIfExists(Order original, Order updated) {