I'm working on a basic application using Java Spring Boot, I'm stuck on this error:

我正在使用Java Spring Boot开发一个基本的应用程序，我遇到了这个错误：

This is the error message:

以下是错误消息：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-12-16 12:44:40.321 ERROR 5698 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userRepository in com.htamayo.sbcrashcourse.SbcrashcourseApplication required a bean named 'entityManagerFactory' 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 named 'entityManagerFactory' in your configuration.

1. My main class looks like this:

   
   

    package com.htamayo.sbcrashcourse;
   
    import com.htamayo.sbcrashcourse.lendingengine.domain.model.User;
    import com.htamayo.sbcrashcourse.lendingengine.domain.repository.UserRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
   
    @SpringBootApplication
    @ComponentScan(basePackages = {"com.htamayo.sbcrashcourse.lendingengine"})
    @EnableJpaRepositories("com.htamayo.sbcrashcourse.lendingengine.domain.repository")
    public class SbcrashcourseApplication implements CommandLineRunner {
   
    @Autowired
    private UserRepository userRepository;
   
    public static void main(String[] args) {SpringApplication.run(SbcrashcourseApplication.class, args);}
   
    @Override
    public void run(String... args) throws Exception {
        userRepository.save(new User(1, "John", "B", 27, "Software Developer"));
        userRepository.save(new User(2, "Peter", "C", 21, "Pilot"));
        userRepository.save(new User(3, "Henry", "E", 21, "Unemployed"));
    }
   

   
   

   }

   
   



2. UserRepository class is this:

   
   

   package com.htamayo.sbcrashcourse.lendingengine.domain.repository;
   
    import com.htamayo.sbcrashcourse.lendingengine.domain.model.User;
    import org.springframework.data.jpa.repository.JpaRepository;
   
    public interface UserRepository extends JpaRepository<User, Long> {
   
    }
   

   
   



3. And my pom.xml looks like this:

   
   

    <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.4.32.Final</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>5.3.9</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.9</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.5.7.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>5.5.7.Final</version>
    </dependency>
    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.1</version>
    </dependency>
   

   
   
   
   
   
   org.springframework.boot
   spring-boot-maven-plugin
   
   
   
   

I've been searching for solutions on Google but so far nothing, so my question is: I don't understand how to overcome the EntityManagerFactory error, am I missing a dependency? or should I refactor my code? any solutions?

我一直在Google上寻找解决方案，但到目前为止还没有找到任何解决方案，所以我的问题是：我不知道如何克服EntityManager Factory错误，我是不是错过了一个依赖项？或者我应该重构我的代码？有什么解决办法吗？

Thanks a lot for your suggestions.

非常感谢你的建议。

Well, after 17 days finally I got the solution:

17天后，我终于找到了答案：

my problem was on properties file, for some reason I used this line (I can't remember why):
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

我的问题出在属性文件上，出于某种原因，我使用了这一行（我不记得为什么）：spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

I just commented it and problem solved.

我只是评论了一下，问题就解决了。

Lessons learned:

吸取的经验教训：

1. always document your code


2. JitterTed's discord is a great source of answers.

Issue : Consider defining a bean named 'entityManagerFactory' in your configuration.

问题：考虑在您的配置中定义一个名为‘entityManagerFactory’的Bean。

Resolution: After 3 days of struggle I found my problem was due to a property on properties file: spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

解决方案：经过3天的努力，我发现我的问题是由于属性文件中的一个属性：spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

Post commented, at least this issue resolved.
I got another issue, which I will update soon.

波斯特评论说，至少这个问题得到了解决。我有另一期，我会很快更新的。