MongoDBに接続できません

SpringとMongoDBを使用したJavaプロジェクトに問題があります。以下のコードを使用してください。

jira.pathとspring.data.mongodb.portを使用してjiraConfig.propertiesでデータベースに接続しようとしましたが、機能せず、解決策が見つかりません。何か忘れましたか？

public class JiraProjectBriefControllerImpl implements JiraProjectBriefController {



  @Autowired
    JiraProjectBriefRepository jiraProjectBriefRepository;

    @Override
    public void update() {
        JiraController jiraController = new JiraControllerImpl();

        List<ProjectBrief> projectBriefs = jiraController.getAllProjectsBrief();

         jiraProjectBriefRepository.save(projectBriefs);
    }

    @Override
    public List<ProjectBrief> getProjectsBrief() {
        return jiraProjectBriefRepository.findAll();
    }

    @Override
    public ProjectBrief findById(int id) {
        return jiraProjectBriefRepository.findById(id);
    }}

// 2番目のクラス

@Configuration
@EnableAutoConfiguration
public interface JiraIntegrationService {

    static void main(String[] args) {

        SpringApplication.run(JiraIntegrationService.class, args);

        JiraProjectBriefController jiraProjectBriefController = new JiraProjectBriefControllerImpl();

        jiraProjectBriefController.update();

        System.out.print(jiraProjectBriefController.getProjectsBrief());
    }

}

//エラー

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:478)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at pl.ie.service.JiraProjectBriefControllerImpl.update(JiraProjectBriefControllerImpl.java:23)
    at pl.ie.JiraIntegrationService.main(JiraIntegrationService.java:26)
    ... 6 more