Spring-Bootで埋め込みTomcatを開始できません

Question

SpringでREST APIを作成していますが、アプリケーションを実行しようとすると大きなエラーログが表示されます。私は、これが問題全体を引き起こすものだと思う。

2016-07-04 21:25:28.267 INFO 532 --- [   main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 
    2016-07-04 21:25:28.282 INFO 532 --- [   main] o.apache.catalina.core.StandardService : Starting service Tomcat 
    2016-07-04 21:25:28.284 INFO 532 --- [   main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.36 
    2016-07-04 21:25:28.398 INFO 532 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]  : Initializing Spring embedded WebApplicationContext 
    2016-07-04 21:25:28.399 INFO 532 --- [ost-startStop-1] o.s.web.context.ContextLoader   : Root WebApplicationContext: initialization completed in 2417 ms 
    2016-07-04 21:25:29.142 INFO 532 --- [ost-startStop-1] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default' 
    2016-07-04 21:25:29.153 INFO 532 --- [ost-startStop-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [ 
     name: default 
     ...] 
    2016-07-04 21:25:29.236 INFO 532 --- [ost-startStop-1] org.hibernate.Version     : HHH000412: Hibernate Core {4.3.11.Final} 
    2016-07-04 21:25:29.238 INFO 532 --- [ost-startStop-1] org.hibernate.cfg.Environment   : HHH000206: hibernate.properties not found 
    2016-07-04 21:25:29.240 INFO 532 --- [ost-startStop-1] org.hibernate.cfg.Environment   : HHH000021: Bytecode provider name : javassist 
    2016-07-04 21:25:29.453 INFO 532 --- [ost-startStop-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {4.0.5.Final} 
    2016-07-04 21:25:29.517 INFO 532 --- [ost-startStop-1] org.hibernate.dialect.Dialect   : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect 
    2016-07-04 21:25:29.729 ERROR 532 --- [ost-startStop-1] o.s.b.c.embedded.tomcat.TomcatStarter : Error starting Tomcat context: org.springframework.beans.factory.BeanCreationException 
    2016-07-04 21:25:29.774 WARN 532 --- [   main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat 
    2016-07-04 21:25:29.793 ERROR 532 --- [   main] o.s.boot.SpringApplication    : Application startup failed 

、障害の根本的な原因は次のとおりです。

Caused by: org.hibernate.MappingException: Could not determine type for: java.util.List, at table: comment, for columns: [org.hibernate.mapping.Column(responses)] 
    at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:349) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:322) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.mapping.Property.isValid(Property.java:241) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:496) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.mapping.RootClass.validate(RootClass.java:270) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.cfg.Configuration.validate(Configuration.java:1360) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1851) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] 
    ... 200 common frames omitted 

これは私のGradleのビルドファイルでは、

buildscript { 
    repositories { 
     mavenCentral() 
    } 
    dependencies { 
     classpath('org.springframework.boot:spring-boot-gradle-plugin:1.3.6.RELEASE') 
    } 
} 

apply plugin: 'java' 
apply plugin: 'spring-boot' 

sourceCompatibility = 1.8 

repositories { 
    mavenCentral() 
} 

dependencies { 

    compile 'org.springframework.boot:spring-boot-starter-data-rest' 
    compile 'org.springframework.boot:spring-boot-starter-data-jpa' 
    compile 'com.h2database:h2' 
    testCompile group: 'junit', name: 'junit', version: '4.11' 
} 

これは私のアプリケーションクラス

​​

私ができることです何が間違っているのかを理解しているようだere。資料は https://github.com/soumasish/Bulletin-Board-Rest-Api でご覧になれます。

Answer 1

エンティティにマッピング情報を含めていません。 @OneToManyと@ManyToOneを使用する必要があります。これにより、Hibernateはエンティティ同士の関係を知ることができます。