尝试使用 mysql 学习带有外键和一对多关系关系的 Spring Boot 但是
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【中文标题】尝试使用 mysql 学习带有外键和一对多关系关系的 Spring Boot 但是【英文标题】：trying to learn Springboot with foreign key and one to many relationship relationship using mysql but 【发布时间】：2019-03-09 19:51:29 【问题描述】：试图在 Spring Boot 中获取外键一对多关系，但我没有得到什么是错误和解决方案 Project struture
这是我的用户模型类 打包在.cubereum.Phoenix_backend.models；
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.TableGenerator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.ToString;
@Entity
public class User
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "user_id", updatable = false, nullable = false)
private int user_id;
@Column(name = "active")
private boolean active;
@Column(name = "department")
private String department;
@Column(name = "division")
private String division;
@Column(name = "email")
private String email;
@Column(name = "employee_id")
private String employee_id;
@Column(name = "mobile_number")
private String mobile_number;
@Column(name = "first_name")
private String first_name;
@Column(name = "last_name")
private String last_name;
@Column(name = "nickname")
private String nickname;
@Column(name = "landline_number")
private String landline_number;
@Column(name = "role_id")
private String role_id;
@Column(name = "title")
private String title;
@Column(name = "city")
private String city;
@Column(name = "username")
private String username;
@Column(name = "passwords")
private String passwords;
@Column(name = "created_by")
private String created_by;
@Column(name = "created_date")
private Date created_date;
@Column(name = "modified_by")
private String modified_by;
@Column(name = "modified_date")
private Date modified_date;
@Column(name = "manager")
private String manager;
@JoinColumn(name = "org_id")
@OneToMany
@JsonIgnore
private Organization organization;
public Organization getOrganization()
return organization;
public void setOrganization(Organization organization)
this.organization = organization;
这是我的组织模型类 打包在.cubereum.Phoenix_backend.models；
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.*;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.ToString;
@Entity
public class Organization
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "org_id", updatable = false, nullable = false)
private int org_id;
@Column(name = "org_code") private int org_code;
@Column(name = "org_name") private String org_name;
@Column(name = "org_description") private String org_description;
@Column(name = "parent_org") private String parent_org;
@Column(name = "address") private String address;
@Column(name = "contact_number") private String contact_number;
@Column(name = "created_by") private String created_by;
@Column(name = "created_date") private Date created_date;
@Column(name = "last_modified_by") private String last_modified_by;
@Column(name = "last_modified_date") private Date last_modified_date;
@ManyToOne
private Set<User> roles = new HashSet<>(0);
public Set<User> getRoles()
return roles;
public void setRoles(Set<User> roles)
this.roles = roles;
这是我的用户服务类
package in.cubereum.Phoenix_backend.endpoints;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import in.cubereum.Phoenix_backend.repository.Userrepository;
@RestController
@RequestMapping(path = "/main")
@Component
@CrossOrigin(origins = "*")
public class UserService
@Autowired
private Userrepository userrepository;
这是我的组织存储库接口
package in.cubereum.Phoenix_backend.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import in.cubereum.Phoenix_backend.models.Organization;
@Repository
public interface Organizationrepository extends JpaRepository<Organization, String>
这是我的用户存储库
package in.cubereum.Phoenix_backend.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import in.cubereum.Phoenix_backend.models.User;
@Repository
public interface Userrepository extends JpaRepository<User, String>
这是我的主要应用程序类
package in.cubereum.Phoenix_backend;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@SpringBootApplication(scanBasePackages="in.cubereum.Phoenix_backend.repository")
@EnableJpaRepositories(basePackages = "in.cubereum.Phoenix_backend.repository")
public class Phoenix_backendApplication extends SpringBootServletInitializer
@Bean
public WebMvcConfigurer corsConfigurer()
return new WebMvcConfigurerAdapter()
@Override
public void addCorsMappings(CorsRegistry registry)
registry.addMapping("/greeting-javaconfig").allowedOrigins("http://localhost:");
;
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application)
return application.sources(Phoenix_backendApplication.class);
public static void main(String[] args)
SpringApplication.run(Phoenix_backendApplication.class, args);
这是我的 build.gradle 文件
buildscript
repositories
mavenCentral()
dependencies
classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.3.RELEASE")
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'war'
group = 'in.cubereum'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories
mavenCentral()
// In this section you declare where to find the dependencies of your project
repositories
// Use jcenter for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
jcenter()
dependencies
// This dependency is used internally, and not exposed to consumers on their own compile classpath.
implementation 'com.google.guava:guava:23.0'
// This dependency is exported to consumers, that is to say found on their compile classpath.
// https://mvnrepository.com/artifact/org.apache.commons/commons-math3
compile group: 'org.apache.commons', name: 'commons-math3', version: '3.6.1'
// Use JUnit test framework
testImplementation 'junit:junit:4.12'
compile('org.springframework.boot:spring-boot-starter')
testCompile('org.springframework.boot:spring-boot-starter-test')
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web
compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.0.4.RELEASE'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent
compile group: 'org.springframework.boot', name: 'spring-boot-starter-parent', version: '2.0.3.RELEASE', ext: 'pom'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '2.0.3.RELEASE'
// https://mvnrepository.com/artifact/mysql/mysql-connector-java
compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.47'
// https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml
compile group: 'com.fasterxml.jackson.dataformat', name: 'jackson-dataformat-xml', version: '2.9.6'
providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat:2.0.4.RELEASE'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-json
compile group: 'org.springframework.boot', name: 'spring-boot-starter-json', version: '2.0.5.RELEASE'
// https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind
compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind'
// https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple
compile group: 'com.googlecode.json-simple', name: 'json-simple'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools
compile group: 'org.springframework.boot', name: 'spring-boot-devtools', version: '2.0.4.RELEASE'
// https://mvnrepository.com/artifact/org.hibernate/hibernate-core
compile group: 'org.hibernate', name: 'hibernate-core', version: '4.1.4.Final'
// https://mvnrepository.com/artifact/javax.persistence/javax.persistence-api
compile group: 'javax.persistence', name: 'javax.persistence-api', version: '2.2'
// https://mvnrepository.com/artifact/org.projectlombok/lombok
compile group: 'org.projectlombok', name: 'lombok', version: '1.16.6'
这是我得到的控制台输出
17:36:28.478 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []
17:36:28.481 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Excluded patterns for restart : [/spring-boot-actuator/target/classes/, /spring-boot-devtools/target/classes/, /spring-boot/target/classes/, /spring-boot-starter-[\w-]+/, /spring-boot-autoconfigure/target/classes/, /spring-boot-starter/target/classes/]
17:36:28.481 [main] DEBUG org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs for reloading : [file:/home/cubereum/workspace/Phoenix_backend/bin/]
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.3.RELEASE)
2018-10-04 17:36:29.008 INFO 20416 --- [ restartedMain] i.c.P.Phoenix_backendApplication : Starting Phoenix_backendApplication on cubereum with PID 20416 (/home/cubereum/workspace/Phoenix_backend/bin started by cubereum in /home/cubereum/workspace/Phoenix_backend)
2018-10-04 17:36:29.012 INFO 20416 --- [ restartedMain] i.c.P.Phoenix_backendApplication : No active profile set, falling back to default profiles: default
2018-10-04 17:36:29.140 INFO 20416 --- [ restartedMain] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@4eaf4b3d: startup date [Thu Oct 04 17:36:29 IST 2018]; root of context hierarchy
2018-10-04 17:36:31.116 INFO 20416 --- [ restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$d548bd60] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-10-04 17:36:31.675 INFO 20416 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-10-04 17:36:31.722 INFO 20416 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-10-04 17:36:31.722 INFO 20416 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-10-04 17:36:31.734 INFO 20416 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-10-04 17:36:31.841 INFO 20416 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-10-04 17:36:31.842 INFO 20416 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2710 ms
2018-10-04 17:36:32.041 INFO 20416 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-10-04 17:36:32.047 INFO 20416 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-10-04 17:36:32.047 INFO 20416 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-10-04 17:36:32.047 INFO 20416 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-10-04 17:36:32.048 INFO 20416 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-10-04 17:36:32.182 WARN 20416 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: At least one JPA metamodel must be present!
2018-10-04 17:36:32.190 INFO 20416 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2018-10-04 17:36:32.225 INFO 20416 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-10-04 17:36:32.233 ERROR 20416 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: At least one JPA metamodel must be present!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1708) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:581) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:741) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at in.cubereum.Phoenix_backend.Phoenix_backendApplication.main(Phoenix_backendApplication.java:34) [bin/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.4.RELEASE.jar:2.0.4.RELEASE]
Caused by: java.lang.IllegalArgumentException: At least one JPA metamodel must be present!
at org.springframework.util.Assert.notEmpty(Assert.java:450) ~[spring-core-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.<init>(JpaMetamodelMappingContext.java:54) ~[spring-data-jpa-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.createInstance(JpaMetamodelMappingContextFactoryBean.java:88) ~[spring-data-jpa-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.createInstance(JpaMetamodelMappingContextFactoryBean.java:43) ~[spring-data-jpa-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.beans.factory.config.AbstractFactoryBean.afterPropertiesSet(AbstractFactoryBean.java:141) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1767) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
... 21 common frames omitted
【问题讨论】：
IllegalArgumentException: At least one JPA metamodel must be present的可能重复@ManyToOne private Set<User> roles = new HashSet<>(0);去掉初始化
【参考方案1】：
我认为你使用MyISAM 引擎，使用InnoDB。支持Foreign Keys。
将此行添加到您的application.properties
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL57InnoDBDialect
【讨论】：
以上是关于尝试使用 mysql 学习带有外键和一对多关系关系的 Spring Boot 但是的主要内容，如果未能解决你的问题，请参考以下文章