我正在尝试设置此项目https://github.com/callicoder/spring-security-react-ant-design-polls-app，我做了安装部分列出的所有操作（下载git内容，运行mvnw.cmd spring-boot：run），但出现了这个奇怪的错误：
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 20.972 s
[INFO] Finished at: 2019-04-27T00:52:35+02:00
[INFO] Final Memory: 45M/542M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.0.RELEASE:run (default-cli) on project polls: An exception occurred while running. null: InvocationTargetException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat: Error creating bean with name 'securityConfig': Unsatisfied dependency expressed through field 'customUserDetailsService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customUserDetailsService': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#37be5564' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#37be5564': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory: Unable to open JDBC Connection for DDL execution: Communications link failure
[ERROR]
[ERROR] The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Connection refused: connect
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
此外，我正在使用最新版本的JDK（1.8）和最新版本的Java。 希望获得帮助，感谢您的阅读，希望很快见到您！