java.lang.NullPointerException: невозможно вызвать "org" .hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(java.sql.SQLException, String)", поскольку возвращаемое значение "org.hibernate.r
ChatGPT сообщило мне следующее:
Похоже, что сообщение об ошибке было обрезано. Однако опубликованная вами часть предполагает, что в Java при использовании Hibernate возникло исключение NullPointerException. Обычно это исключение. указывает, что ваш код пытался использовать ссылку на объект, для которой было установлено значение NULL.
В этом контексте ошибка включает в себя попытку вызвать метод для нулевого объекта в Hibernate, который является объектом -Инструмент реляционного сопоставления (ORM) для Java. Это может произойти по нескольким причинам:
Неинициализированная или неправильно настроенная SessionFactory: перед попыткой использования убедитесь, что ваша SessionFactory правильно настроена и инициализирована. это.
Проблемы с подключением к базе данных. Проблема может быть связана с настройкой подключения к базе данных. Проверьте строки подключения к базе данных, учетные данные и доступность.
Ошибочный запрос или сопоставление отношений сущностей. Проблема также может возникнуть из-за ошибочного запроса или неправильного сопоставления отношений сущностей, что приводит к возврату нулевых значений, где ожидается объект.
Если вы предоставите более подробную информацию о коде и контексте, в котором возникает эта ошибка, я смогу предложить более целенаправленное решение!
но это не дает мне того, что я хочу.
Код: Выделить всё
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/\\ / _'_ _ _(_)_ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _ | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |__| .|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.3.1)
2024-07-05T23:24:35.440+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] c.S.StudentManagmentApplication : Starting StudentManagmentApplication using Java 17.0.9 with PID 9316 (D:\StudentManage\StudentManagment\target\classes started by gaurav in D:\StudentManage\StudentManagment)
2024-07-05T23:24:35.444+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] c.S.StudentManagmentApplication : No active profile set, falling back to 1 default profile: "default"
2024-07-05T23:24:35.571+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2024-07-05T23:24:35.576+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2024-07-05T23:24:36.776+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2024-07-05T23:24:36.813+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 21 ms. Found 0 JPA repository interfaces.
2024-07-05T23:24:37.906+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2024-07-05T23:24:37.922+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2024-07-05T23:24:37.923+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.25]
2024-07-05T23:24:38.043+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2024-07-05T23:24:38.047+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2464 ms
2024-07-05T23:24:38.304+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2024-07-05T23:24:38.398+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 6.5.2.Final
2024-07-05T23:24:38.456+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.h.c.internal.RegionFactoryInitiator : HHH000026: Second-level cache disabled
2024-07-05T23:24:38.892+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.s.o.j.p.SpringPersistenceUnitInfo : No LoadTimeWeaver setup: ignoring JPA class transformer
2024-07-05T23:24:38.936+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2024-07-05T23:24:40.397+05:30 WARN 9316 --- [StudentManagment ] [ restartedMain] o.h.e.j.e.i.JdbcEnvironmentInitiator : HHH000342: Could not obtain connection to query metadata
java.lang.NullPointerException: Cannot invoke "org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(java.sql.SQLException, String)" because the return value of "org.hibernate.resource.transaction.backend.jdbc.internal.JdbcIsolationDelegate.sqlExceptionHelper()" is null
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcIsolationDelegate.delegateWork(JdbcIsolationDelegate.java:116) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.getJdbcEnvironmentUsingJdbcMetadata(JdbcEnvironmentInitiator.java:290) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:123) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:77) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:130) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:238) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:215) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.boot.model.relational.Database.(Database.java:45) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.getDatabase(InFlightMetadataCollectorImpl.java:221) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.(InFlightMetadataCollectorImpl.java:189) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:171) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1431) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1502) ~[hibernate-core-6.5.2.Final.jar:6.5.2.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:75) ~[spring-orm-6.1.10.jar:6.1.10]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:390) ~[spring-orm-6.1.10.jar:6.1.10]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-6.1.10.jar:6.1.10]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-6.1.10.jar:6.1.10]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:366) ~[spring-orm-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1835) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1784) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:600) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-6.1.10.jar:6.1.10]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:952) ~[spring-context-6.1.10.jar:6.1.10]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) ~[spring-context-6.1.10.jar:6.1.10]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.3.1.jar:3.3.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.3.1.jar:3.3.1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.3.1.jar:3.3.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.3.1.jar:3.3.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.3.1.jar:3.3.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.3.1.jar:3.3.1]
at com.StudentManagment.StudentManagmentApplication.main(StudentManagmentApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50) ~[spring-boot-devtools-3.3.1.jar:3.3.1]
2024-07-05T23:24:40.477+05:30 WARN 9316 --- [StudentManagment ] [ restartedMain] org.hibernate.orm.deprecation : HHH90000025: MySQL8Dialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)
2024-07-05T23:24:40.479+05:30 WARN 9316 --- [StudentManagment ] [ restartedMain] org.hibernate.orm.deprecation : HHH90000026: MySQL8Dialect has been deprecated; use org.hibernate.dialect.MySQLDialect instead
2024-07-05T23:24:40.981+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
2024-07-05T23:24:40.991+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2024-07-05T23:24:41.094+05:30 WARN 9316 --- [StudentManagment ] [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2024-07-05T23:24:41.599+05:30 WARN 9316 --- [StudentManagment ] [ restartedMain] ion$DefaultTemplateResolverConfiguration : Cannot find template location: classpath:/templates/ (please add some templates, check your Thymeleaf configuration, or set spring.thymeleaf.check-template-location=false)
2024-07-05T23:24:41.800+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2024-07-05T23:24:41.871+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path '/'
2024-07-05T23:24:41.905+05:30 INFO 9316 --- [StudentManagment ] [ restartedMain] c.S.StudentManagmentApplication : Started StudentManagmentApplication in 7.172 seconds (process running for 8.232)
Подробнее здесь: https://stackoverflow.com/questions/787 ... -hibernate
