Hibernate在创建表时出现异常。

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英文:

Hibernate exception in creating a table

问题

以下是您提供的内容的翻译部分:

请帮我找出这个异常的原因以及如何解决它。

我正在按照 YouTube 教程尝试在名为“abc”的 MySQL 数据库中创建一个名为“alien”的表。我正在使用 Hibernate ORM 工具和 Maven 进行操作,但是 Hibernate 抛出了异常:

org.hibernate.tool.schema.spi.CommandAcceptanceException: 通过 JDBC 语句执行 DDL“create table Alien (stud_id integer not null, age integer not null, marks integer not null, stud_name varchar(255), primary key (stud_id)) type=MyISAM”时出错

下面是完整的堆栈跟踪:

"C:\Program Files\Java\jdk-14.0.2\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\lib\idea_rt.jar=57063:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\bin" -Dfile.encoding=UTF-8 -classpath D:\BITS\Practice-School-2\Training\HibernateDemo\target\classes;C:\Users\shshw\.m2\repository\org\hibernate\hibernate-core.4.20.Final\hibernate-core-5.4.20.Final.jar;... (其他依赖)... com.Telusko.App
2020年8月27日 下午9:35:24 org.hibernate.Version logVersion
信息: HHH000412: Hibernate ORM 核心版本 5.4.20.Final
2020年8月27日 下午9:35:25 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
信息: HCANN000001: Hibernate Commons 注解 {5.1.0.Final}
2020年8月27日 下午9:35:25 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
警告: HHH10001002: 使用 Hibernate 内置连接池(不适用于生产环境!)
2020年8月27日 下午9:35:25 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
信息: HHH10001005: 使用驱动程序 [com.mysql.cj.jdbc.Driver] 中的 URL [jdbc:mysql://localhost:3306/abc]
2020年8月27日 下午9:35:25 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
信息: HHH10001001: 连接属性: {password=****, user=root}
... (其他日志)...

这是要创建表的实体类(POJO):

package com.Telusko;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Alien {

    @Id
    int stud_id;
    String stud_name;
    int marks;
    int age;

    // getter 和 setter 方法...
}

这是 Maven 项目的 pom.xml 文件:

<!-- 依赖项配置... -->

这是 Hibernate 配置文件 hibernate.cfg.xml

<!-- Hibernate 配置... -->

这是主类的代码:

package com.Telusko;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class App 
{
    public static void main( String[] args )
    {
        // 创建实体对象...
        // 配置和打开会话...
        // 保存实体并提交事务...
        System.out.println( "Hello World!" );
    }
}

以上是您提供内容的翻译。

英文:

Please help me figure out the reason of this exception and how to resolve it.

Following a youtube tutorial, I am trying to create a table named 'alien' in a MySQL database named 'abc'. I am using the Hibernate ORM tool and Maven for this but Hibernate is throwing an exception

org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL &quot;create table Alien (stud_id integer not null, age integer not null, marks integer not null, stud_name varchar(255), primary key (stud_id)) type=MyISAM&quot; via JDBC Statement

Here is the complete stack trace:

&quot;C:\Program Files\Java\jdk-14.0.2\bin\java.exe&quot; &quot;-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\lib\idea_rt.jar=57063:C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\bin&quot; -Dfile.encoding=UTF-8 -classpath D:\BITS\Practice-School-2\Training\HibernateDemo\target\classes;C:\Users\shshw\.m2\repository\org\hibernate\hibernate-core\5.4.20.Final\hibernate-core-5.4.20.Final.jar;C:\Users\shshw\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\shshw\.m2\repository\javax\persistence\javax.persistence-api\2.2\javax.persistence-api-2.2.jar;C:\Users\shshw\.m2\repository\org\javassist\javassist\3.24.0-GA\javassist-3.24.0-GA.jar;C:\Users\shshw\.m2\repository\net\bytebuddy\byte-buddy\1.10.10\byte-buddy-1.10.10.jar;C:\Users\shshw\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\shshw\.m2\repository\org\jboss\spec\javax\transaction\jboss-transaction-api_1.2_spec\1.1.1.Final\jboss-transaction-api_1.2_spec-1.1.1.Final.jar;C:\Users\shshw\.m2\repository\org\jboss\jandex\2.1.3.Final\jandex-2.1.3.Final.jar;C:\Users\shshw\.m2\repository\com\fasterxml\classmate\1.5.1\classmate-1.5.1.jar;C:\Users\shshw\.m2\repository\javax\activation\javax.activation-api\1.2.0\javax.activation-api-1.2.0.jar;C:\Users\shshw\.m2\repository\org\dom4j\dom4j\2.1.3\dom4j-2.1.3.jar;C:\Users\shshw\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.1.0.Final\hibernate-commons-annotations-5.1.0.Final.jar;C:\Users\shshw\.m2\repository\javax\xml\bind\jaxb-api\2.3.1\jaxb-api-2.3.1.jar;C:\Users\shshw\.m2\repository\org\glassfish\jaxb\jaxb-runtime\2.3.1\jaxb-runtime-2.3.1.jar;C:\Users\shshw\.m2\repository\org\glassfish\jaxb\txw2\2.3.1\txw2-2.3.1.jar;C:\Users\shshw\.m2\repository\com\sun\istack\istack-commons-runtime\3.0.7\istack-commons-runtime-3.0.7.jar;C:\Users\shshw\.m2\repository\org\jvnet\staxex\stax-ex\1.8\stax-ex-1.8.jar;C:\Users\shshw\.m2\repository\com\sun\xml\fastinfoset\FastInfoset\1.2.15\FastInfoset-1.2.15.jar;C:\Users\shshw\.m2\repository\mysql\mysql-connector-java\8.0.21\mysql-connector-java-8.0.21.jar;C:\Users\shshw\.m2\repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar com.Telusko.App
Aug 27, 2020 9:35:24 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate ORM core version 5.4.20.Final
Aug 27, 2020 9:35:25 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager &lt;clinit&gt;
INFO: HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
Aug 27, 2020 9:35:25 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Aug 27, 2020 9:35:25 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/abc]
Aug 27, 2020 9:35:25 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {password=****, user=root}
Aug 27, 2020 9:35:25 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Aug 27, 2020 9:35:25 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections &lt;init&gt;
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
Aug 27, 2020 9:35:25 PM org.hibernate.dialect.Dialect &lt;init&gt;
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
Aug 27, 2020 9:35:26 PM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@380e1909] for (non-JTA) DDL execution was not in auto-commit mode; the Connection &#39;local transaction&#39; will be committed and the Connection will be set into auto-commit mode.
Aug 27, 2020 9:35:26 PM org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException
WARN: GenerationTarget encountered exception accepting command : Error executing DDL &quot;create table Alien (stud_id integer not null, age integer not null, marks integer not null, stud_name varchar(255), primary key (stud_id)) type=MyISAM&quot; via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL &quot;create table Alien (stud_id integer not null, age integer not null, marks integer not null, stud_name varchar(255), primary key (stud_id)) type=MyISAM&quot; via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlString(AbstractSchemaMigrator.java:559)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlStrings(AbstractSchemaMigrator.java:504)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.createTable(AbstractSchemaMigrator.java:277)
at org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl.performTablesMigration(GroupedSchemaMigratorImpl.java:71)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:207)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73)
at org.hibernate.internal.SessionFactoryImpl.&lt;init&gt;(SessionFactoryImpl.java:316)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:469)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at com.Telusko.App.main(App.java:23)
Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near &#39;type=MyISAM&#39; at line 1
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:764)
at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:648)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
... 13 more
Aug 27, 2020 9:35:26 PM org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator initiateService
INFO: HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
Aug 27, 2020 9:35:26 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1146, SQLState: 42S02
Aug 27, 2020 9:35:26 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: Table &#39;abc.alien&#39; doesn&#39;t exist
Exception in thread &quot;main&quot; javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1367)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:454)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3213)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2381)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:447)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101)
at com.Telusko.App.main(App.java:28)
Caused by: org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:200)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3255)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3782)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:107)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478)
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:723)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:348)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40)
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1363)
... 9 more
Caused by: java.sql.SQLSyntaxErrorException: Table &#39;abc.alien&#39; doesn&#39;t exist
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:953)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1092)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1040)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeLargeUpdate(ClientPreparedStatement.java:1347)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdate(ClientPreparedStatement.java:1025)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:197)
... 20 more
Process finished with exit code 1

Here is the POJO/Entity for the table to be created:

package com.Telusko;

//POJO- Plain Old Java Object

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Alien {

    @Id
    int stud_id;
    String stud_name;
    int marks;
    int age;

    public int getStud_id() {
        return stud_id;
    }

    public void setStud_id(int stud_id) {
        this.stud_id = stud_id;
    }

    public String getStud_name() {
        return stud_name;
    }

    public void setStud_name(String stud_name) {
        this.stud_name = stud_name;
    }

    public int getMarks() {
        return marks;
    }

    public void setMarks(int marks) {
        this.marks = marks;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

Here is the pom.xml file for the Maven project:

&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;

&lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
  xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
  &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;

  &lt;groupId&gt;com.Telusko&lt;/groupId&gt;
  &lt;artifactId&gt;HibernateDemo&lt;/artifactId&gt;
  &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt;

  &lt;name&gt;HibernateDemo&lt;/name&gt;
  &lt;!-- FIXME change it to the project&#39;s website --&gt;
  &lt;url&gt;http://www.example.com&lt;/url&gt;

  &lt;properties&gt;
    &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
    &lt;maven.compiler.source&gt;1.7&lt;/maven.compiler.source&gt;
    &lt;maven.compiler.target&gt;1.7&lt;/maven.compiler.target&gt;
  &lt;/properties&gt;


  &lt;dependencies&gt;

    &lt;dependency&gt;
      &lt;groupId&gt;junit&lt;/groupId&gt;
      &lt;artifactId&gt;junit&lt;/artifactId&gt;
      &lt;version&gt;4.11&lt;/version&gt;
      &lt;scope&gt;test&lt;/scope&gt;
    &lt;/dependency&gt;

    &lt;!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core --&gt;
    &lt;dependency&gt;
      &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
      &lt;artifactId&gt;hibernate-core&lt;/artifactId&gt;
      &lt;version&gt;5.4.20.Final&lt;/version&gt;
    &lt;/dependency&gt;

    &lt;!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --&gt;
    &lt;dependency&gt;
      &lt;groupId&gt;mysql&lt;/groupId&gt;
      &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
      &lt;version&gt;8.0.21&lt;/version&gt;
    &lt;/dependency&gt;
  &lt;/dependencies&gt;

  &lt;build&gt;
    &lt;pluginManagement&gt;&lt;!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --&gt;
      &lt;plugins&gt;
        &lt;!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle --&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-clean-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.1.0&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging --&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-resources-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.0.2&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.8.0&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-surefire-plugin&lt;/artifactId&gt;
          &lt;version&gt;2.22.1&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-jar-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.0.2&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-install-plugin&lt;/artifactId&gt;
          &lt;version&gt;2.5.2&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-deploy-plugin&lt;/artifactId&gt;
          &lt;version&gt;2.8.2&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle --&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-site-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.7.1&lt;/version&gt;
        &lt;/plugin&gt;
        &lt;plugin&gt;
          &lt;artifactId&gt;maven-project-info-reports-plugin&lt;/artifactId&gt;
          &lt;version&gt;3.0.0&lt;/version&gt;
        &lt;/plugin&gt;
      &lt;/plugins&gt;
    &lt;/pluginManagement&gt;
  &lt;/build&gt;
&lt;/project&gt;

The hibernate.cfg.xml file:

&lt;?xml version=&#39;1.0&#39; encoding=&#39;utf-8&#39;?&gt;
&lt;!DOCTYPE hibernate-configuration PUBLIC
        &quot;-//Hibernate/Hibernate Configuration DTD//EN&quot;
        &quot;http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd&quot;&gt;
&lt;hibernate-configuration&gt;
    &lt;session-factory&gt;
        &lt;property name=&quot;hibernate.connection.driver_class&quot;&gt;com.mysql.cj.jdbc.Driver&lt;/property&gt;
        &lt;property name=&quot;hibernate.connection.url&quot;&gt;jdbc:mysql://localhost:3306/abc&lt;/property&gt;
        &lt;property name=&quot;hibernate.connection.username&quot;&gt;root&lt;/property&gt;
        &lt;property name=&quot;hibernate.connection.password&quot;&gt;&lt;/property&gt;
        &lt;property name=&quot;hibernate.dialect&quot;&gt;org.hibernate.dialect.MySQLDialect&lt;/property&gt;
        &lt;property name=&quot;hbm2ddl.auto&quot;&gt;update&lt;/property&gt;

        &lt;!--        &lt;property name=&quot;hibernate.connection.autocommit&quot;&gt;True&lt;/property&gt;--&gt;

        &lt;!-- &lt;property name=&quot;connection.username&quot;/&gt; --&gt;
        &lt;!-- &lt;property name=&quot;connection.password&quot;/&gt; --&gt;

        &lt;!-- DB schema will be updated if needed --&gt;
        &lt;!-- &lt;property name=&quot;hibernate.hbm2ddl.auto&quot;&gt;update&lt;/property&gt; --&gt;
    &lt;/session-factory&gt;
&lt;/hibernate-configuration&gt;

The main class file:

package com.Telusko;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class App 
{
    public static void main( String[] args )
    {
        Alien alien = new Alien();
        alien.setStud_id(101);
        alien.setStud_name(&quot;Navin&quot;);
        alien.setMarks(67);
        alien.setAge(22);

        Configuration configuration = new Configuration().configure().addAnnotatedClass(Alien.class);
        SessionFactory sessionFactory = configuration.buildSessionFactory();
        Session session = sessionFactory.openSession();

        Transaction transaction = session.beginTransaction();
        session.save(alien);
        transaction.commit();
        System.out.println( &quot;Hello World!&quot; );
    }
}

答案1

得分: 1

在您的 persistence.cfg.xml 文件中,您应该将方言更改为:org.hibernate.dialect.MySQL5InnoDBDialect

或者您可以直接移除它,Hibernate 应该能够自动检测到

这样应该可以让 Hibernate 创建 InnoDB 表,而不是 MyISAM。

英文:

In your persistence.cfg.xml file you should change the dialect to: org.hibernate.dialect.MySQL5InnoDBDialect

Or you can simply remove it, Hibernate should be able to detect it automatically

This should let Hibernate create InnoDB tables instead of MyISAM

答案2

得分: 1

尝试使用不同的方言,如果你正在使用MySQL v8,那么请使用这些方言:org.hibernate.dialect.MySQL8Dialectcom.mysql.cj.jdbc.Driver
问题出在方言上,你可以检查它生成的是type=MyISAM,而应该是ENGINE=MyISAM
从MySQL 5版本开始,type已被弃用,ENGINE已从那个版本开始取代它,因为你正在使用MySQL8依赖,所以需要使用ENGINE
所以查询应该像这样:
create table Alien (列名) Engine=MyISAM
使用InnoDB引擎替代MyISAM
尝试在控制台或工作台中执行查询。

英文:

Try using different dialects, if you are using MySQL v8 then use these dialects org.hibernate.dialect.MySQL8Dialect or com.mysql.cj.jdbc.Driver
error is with the dialect, you can check its generating type=MyISAM instead it should be ENGINE=MyISAM

type is deprecated from MySQL version 5, ENGINE is replaced from that version, since you are using MySQL8 dependency you need to use ENGINE

so the query should like this
create table Alien (columns names) Engine=MyISAM

use InnoDB engine instead of MyISAM

try executing the query in the console or workbench

huangapple
  • 本文由 发表于 2020年8月28日 00:20:41
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