Question

我在Spring编写REST Api，当我尝试运行应用程序时，我收到了一个巨大的错误日志。我认为这是触发整个问题的原因。

    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

失败的根本原因是：

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

这是我的gradle构建文件，

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'
}

这是我的应用程序类

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

我似乎无法理解这里出了什么问题。来源可在 https://github.com/soumasish/Bulletin-Board-Rest-Api 任何帮助表示赞赏。

Answer 1

您尚未在实体中包含任何映射信息。您需要使用@OneToMany和@ManyToOne，以便Hibernate知道您的实体如何相互关联。

Spring-Boot无法启动嵌入式Tomcat

1 个答案: