"Could not autowire. No beans of type... found" with Simple project
Solution 1
A couple of possibilities here.
You need to add the @EnableJpaRepositories(basePackages = {"your.pkg.here"})
to the TestApplication
. This tells Spring Data to look for your repository classes under the specified package. If the repository package name is the same as the TestApplication
, you can skip the basePackages
part.
Similarly, if your TestApplication
and SimpRepository
are not in the same package, you need to add a @ComponentScan
with the list of all relevant packages.
Solution 2
I missed a simple @Component
for the class. This could be one basic problem.
Solution 3
Add a simple @Repository
annotation above your repository class and it will work fine.
IcedDante
Updated on July 09, 2022Comments
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IcedDante almost 2 years
I downloaded the simple JPA Spring Boot tutorial and it worked just fine. However, when I attempt to replicate this simple behavior in my own test project, I get a "could not autowire" error on the bean injection in my Application.demo() method that returns a CommandLineRunner. The project is so barebones I don't even know what to submit but here's the POM:
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>test</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
And the application.
package com.example; @SpringBootApplication public class TestApplication { public static void main(String[] args) { SpringApplication.run(TestApplication.class, args); } @Bean //errors with: "Could not autowire. No beans of 'SimpRepository' type found" public CommandLineRunner demo(SimpRepository repository) { return (args) -> { }; } }
And the Repository service:
package com.example; public interface SimpRepository extends CrudRepository<Simp, Long> { }
for the following entity:
package com.example; @Entity public class Simp { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String value; public Simp(String value) { this.value = value; } }