我正在使用 hibernate 来连接到 mysql 数据库。
就像在各种教程中建议的那样，我设置我的应用程序属性，如下所示：
spring.datasource.jdbcUrl=jdbc:mysql://localhost:3306/test_schema spring.datasource.username=root spring.datasource.password= spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true spring.jpa.generate-ddl=true
现在，如果我省略 hibernate 方言，它会使用 HSQLDialect ，它显示基于我的两个实体创建的两个表。但它们都没有显示在 MySQL Workbench 中...
如果我使用上面显示的方言，我会收到以下错误：
2022-04-12 13:33:50.453 WARN 26016 --- [ main] o.h.t.s.i.ExceptionHandlerLoggedImpl : GenerationTarget encountered exception accepting command : Error executing DDL "create table booking_entry (id bigint not null, employee_id bigint not null, project_id bigint, primary key (id)) engine=InnoDB" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "create table booking_entry (id bigint not null, employee_id bigint not null, project_id bigint, primary key (id)) engine=InnoDB" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlString(AbstractSchemaMigrator.java:581) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlStrings(AbstractSchemaMigrator.java:526) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.createTable(AbstractSchemaMigrator.java:293) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl.performTablesMigration(GroupedSchemaMigratorImpl.java:74) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:220) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:123) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:196) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:85) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:335) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:471) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1498) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.18.jar:5.3.18]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.18.jar:5.3.18]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.18.jar:5.3.18]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.18.jar:5.3.18]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBeanrrreee(AbstractBeanFactory.java:335) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.18.jar:5.3.18]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.18.jar:5.3.18]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.18.jar:5.3.18]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.18.jar:5.3.18]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.6.jar:2.6.6]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.6.jar:2.6.6]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.6.jar:2.6.6]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.6.jar:2.6.6]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
at com.example.demo.DemoApplication.main(DemoApplication.java:12) ~[classes/:na]
Caused by: java.sql.SQLSyntaxErrorException: unexpected token: ENGINE
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.jdbc.JDBCStatement.execute(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.6.7.Final.jar:5.6.7.Final]
... 34 common frames omitted
Caused by: org.hsqldb.HsqlException: unexpected token: ENGINE
at org.hsqldb.error.Error.parseError(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.ParserBase.unexpectedToken(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.ParserCommand.compilePart(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.ParserCommand.compileStatements(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.Session.executeDirectStatement(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
at org.hsqldb.Session.execute(Unknown Source) ~[hsqldb-2.5.2.jar:2.5.2]
... 39 common frames omitted
所以基本上 unexpected token: ENGINE 是错误。
我的项目的其余部分非常基础，就像这个 Spring 教程一样，但我使用了 JPA 存储库而不是 CRUD。
最终我尝试连接 MS Access 数据库和 MySQL 数据库。我把一切都准备好了并运行了一段时间，但现在 MySQL 部分搞砸了，所以我创建了这个具有相同问题的简单示例。
任何建议都会很有帮助，因为我已经准备好几天来解决这个问题了......
我已经尝试在MySQL Workbench上运行create table booking_entry (id bigint not null,employee_id bigint not null,project_id bigint,primary key (id))engine=InnoDB命令，效果很好。所以它与我的数据库无关。
我认为你应该尝试