英文:
Field Repository in Controller required a bean of type Repository that could not be found
问题
Here is the translated content you requested:
我在这里首次发帖。
我正在学习Spring Boot，并一直试图让我的Spring Boot应用程序运行一段时间了。
我认为我的存储库可能有问题，因为当我将以下行添加到我的控制器类时：
@Autowired
private StoreCardRepository storeCardRepository;
我收到以下错误消息：
2023-05-09T23:39:44.036-07:00 INFO 433094 --- [ main] example.storecard.StoreCardApplication : 使用Java 18.0.2.1启动StoreCardApplication，PID为433094（/media/ryuga/656464b7-2c1e-4da4-8da9-54f5442a88fe/ryuga/IdeaProjects/storecard/target/classes在/media/ryuga/656464b7-2c1e-4da4-8da9-54f5442a88fe/ryuga/IdeaProjects/storecard中启动）
2023-05-09T23:39:44.037-07:00 INFO 433094 --- [ main] example.storecard.StoreCardApplication : 未设置活动配置文件，退回到1个默认配置文件："default"
2023-05-09T23:39:44.371-07:00 INFO 433094 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : 使用端口（s）初始化Tomcat：8080（http）
2023-05-09T23:39:44.376-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardService : 启动服务[Tomcat]
2023-05-09T23:39:44.376-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardEngine : 启动Servlet引擎：[Apache Tomcat/10.1.8]
2023-05-09T23:39:44.411-07:00 INFO 433094 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : 初始化Spring嵌入式WebApplicationContext
2023-05-09T23:39:44.412-07:00 INFO 433094 --- [ main] w.s.c.ServletWebServerApplicationContext : 根WebApplicationContext：初始化完成，耗时356毫秒
2023-05-09T23:39:44.435-07:00 WARN 433094 --- [ main] ConfigServletWebServerApplicationContext : 上下文初始化期间遇到异常-取消刷新尝试：org.springframework.beans.factory.UnsatisfiedDependencyException：通过字段'storeCardRepository'表示的未满足的依赖关系创建bean的错误：没有类型为'example.storecard.StoreCardRepository'的合格bean可用：预期至少有1个合格的bean作为自动装配候选者。依赖注释：{@org.springframework.beans.factory.annotation.Autowired(required=true)}
2023-05-09T23:39:44.436-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardService : 停止服务[Tomcat]
2023-05-09T23:39:44.443-07:00 INFO 433094 --- [ main] .s.b.a.l.ConditionEvaluationReportLogger :
启动应用程序时出错。要显示条件评估报告，请以'debug'模式重新运行应用程序。
2023-05-09T23:39:44.450-07:00 ERROR 433094 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
应用程序启动失败
***************************
描述：
在example.storecard.StoreCardController的字段storeCardRepository中需要类型为'example.storecard.StoreCardRepository'的bean，但找不到。
注入点具有以下注释：
- @org.springframework.beans.factory.annotation.Autowired(required=true)
操作：
考虑在您的配置中定义一个类型为'example.storecard.StoreCardRepository'的bean。
进程以退出代码1结束
这是您的项目结构：
以下是example.storecard文件中每个文件的代码：
StoreCard.java
package example.storecard;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public record StoreCard(@Id Long id, Double amount) {
}
StoreCardApplication.java
package example.storecard;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
public class StoreCardApplication {
public static void main(String[] args) {
SpringApplication.run(StoreCardApplication.class, args);
}
}
StoreCardController.java
package example.storecard;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Optional;
@RestController
@RequestMapping("/storecards")
public class StoreCardController {
@Autowired
private StoreCardRepository storeCardRepository;
@GetMapping("/{requestedId}")
public ResponseEntity<StoreCard> findById(@PathVariable Long requestedId){
Optional<StoreCard> storeCard = storeCardRepository.findById(requestedId);
if(storeCard.isPresent()){
return ResponseEntity.ok(storeCard.get());
}
return ResponseEntity.notFound().build();
}
}
StoreCardRepository.java
package example.storecard;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface StoreCardRepository extends CrudRepository<StoreCard, Long> {
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.0.6</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>example</groupId>
<artifactId>storecard</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>StoreCard</name>
<description>StoreCard service for woodland water store</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<details>
<summary>英文:</summary>
First post here.
I am learning spring boot and I've been stuck with trying to get my spring boot application to run for a while.
I assume something with my repository is wrong since when I add the line to my controller class
@Autowired
private StoreCardRepository storeCardRepository;
I get the following error:
2023-05-09T23:39:44.036-07:00 INFO 433094 --- [ main] example.storecard.StoreCardApplication : Starting StoreCardApplication using Java 18.0.2.1 with PID 433094 (/media/ryuga/656464b7-2c1e-4da4-8da9-54f5442a88fe/ryuga/IdeaProjects/storecard/target/classes started by ryuga in /media/ryuga/656464b7-2c1e-4da4-8da9-54f5442a88fe/ryuga/IdeaProjects/storecard)
2023-05-09T23:39:44.037-07:00 INFO 433094 --- [ main] example.storecard.StoreCardApplication : No active profile set, falling back to 1 default profile: "default"
2023-05-09T23:39:44.371-07:00 INFO 433094 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2023-05-09T23:39:44.376-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2023-05-09T23:39:44.376-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.8]
2023-05-09T23:39:44.411-07:00 INFO 433094 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2023-05-09T23:39:44.412-07:00 INFO 433094 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 356 ms
2023-05-09T23:39:44.435-07:00 WARN 433094 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'storeCardController': Unsatisfied dependency expressed through field 'storeCardRepository': No qualifying bean of type 'example.storecard.StoreCardRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2023-05-09T23:39:44.436-07:00 INFO 433094 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2023-05-09T23:39:44.443-07:00 INFO 433094 --- [ main] .s.b.a.l.ConditionEvaluationReportLogger :
Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2023-05-09T23:39:44.450-07:00 ERROR 433094 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
APPLICATION FAILED TO START
Description:
Field storeCardRepository in example.storecard.StoreCardController required a bean of type 'example.storecard.StoreCardRepository' 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 'example.storecard.StoreCardRepository' in your configuration.
Process finished with exit code 1
Here is my project structure
[Showing where files are at](https://i.stack.imgur.com/s45Oi.png)
And here is the code for each of the files in example.storecard:
StoreCard.java
package example.storecard;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public record StoreCard(@Id Long id, Double amount) {
}
StoreCardApplication.java
package example.storecard;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
public class StoreCardApplication {
public static void main(String[] args) {
SpringApplication.run(StoreCardApplication.class, args);
}
}
StoreCardController.java
package example.storecard;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Optional;
@RestController
@RequestMapping("/storecards")
public class StoreCardController {
@Autowired
private StoreCardRepository storeCardRepository;
@GetMapping("/{requestedId}")
public ResponseEntity<StoreCard> findById(@PathVariable Long requestedId){
Optional<StoreCard> storeCard = storeCardRepository.findById(requestedId);
if(storeCard.isPresent()){
return ResponseEntity.ok(storeCard.get());
}
return ResponseEntity.notFound().build();
}
}
StoreCardRepository.java
package example.storecard;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface StoreCardRepository extends CrudRepository<StoreCard, Long> {
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.0.6</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>example</groupId>
<artifactId>storecard</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>StoreCard</name>
<description>StoreCard service for woodland water store</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jdbc</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<version>8.0.33</version>
</dependency>
<dependency>
<groupId>jakarta.persistence</groupId>
<artifactId>jakarta.persistence-api</artifactId>
<version>2.2.3</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>com.h2database</groupId>-->
<!-- <artifactId>h2</artifactId>-->
<!-- <scope>runtime</scope>-->
<!-- </dependency>-->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Reading through the output I noticed 2 things
ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'storeCardController': Unsatisfied dependency expressed through field 'storeCardRepository': No qualifying bean of type 'example.storecard.StoreCardRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
and
Field storeCardRepository in example.storecard.StoreCardController required a bean of type 'example.storecard.StoreCardRepository' 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 'example.storecard.StoreCardRepository' in your configuration.
I can guess that this is saying that something is wrong with my repository class and spring boot not being able to make a bean for it for some reason. But since that is the extent of my knowledge with spring boot all I can do is google and see if there is another post out there that might solve my issue but I've found nothing so far after trying many possible solutions.
</details>
# 答案1
**得分**: 3
In the pom.xml file remove this:
```
Add following instead:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
Change the repository interface to extend JpaRepository like this:
public interface StoreCardRepository extends JpaRepository<StoreCard, Long> {
}
The entity class can't be a Java record. It should be a Java bean (POJO) with mandatory getters, setters and no-args constructor. Something like this:
@Entity
@NoArgsConstructor
@Getter
@Setter
@ToString
public class StoreCard {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private BigDecimal amount;
}
Please note: the annotations for getters and setters etc come from Lombok. Very helpful plugin. Otherwise you will need to implement it yourself.
英文:
In the pom.xml file remove this:
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jdbc</artifactId>
</dependency>
<dependency>
<groupId>jakarta.persistence</groupId>
<artifactId>jakarta.persistence-api</artifactId>
<version>2.2.3</version>
</dependency>
Add following instead:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
Change the repository interface to extend JpaRepository like this:
public interface StoreCardRepository extends JpaRepository<StoreCard, Long> {
}
The entity class can't be a Java record. It should be a Java bean (POJO) with mandatory getters, setters and no-args constructor. Something like this:
@Entity
@NoArgsConstructor
@Getter
@Setter
@ToString
public class StoreCard {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private BigDecimal amount;
}
Please note: the annotations for getters and setters etc come from Lombok. Very helpful plugin. Otherwise you will need to implement it yourself.
答案2
得分: 1
你似乎缺少包含数据源自动配置的JPA依赖项
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
英文:
It seems that you are missing the jpa dependency which contains the autoconfigure for your datasource
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
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