java hibernate xml配置似乎不起作用

Question

我正在学习hibernate，并试图进行xml配置，但这似乎不起作用

冬眠。cfg。xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
 <session-factory>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.password">87654321</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/protein_tracker</property>

  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.default_schema">protein_tracker</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  <property name="hibernate.show_sql">true</property>
  <property name="hibernate.hbm2ddl.auto">create</property>
  <mapping resource="com/andrei/User.hbm.xml"/>
 </session-factory>
</hibernate-configuration>

<property name="hibernate.hbm2ddl.auto">create</property>不起作用。我得到一个例外：数据库中没有可用的表

用户。哈佛商学院。xml：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<class name="com.andrei.User" table="Users">
    <id name="id" type="int">
        <column name="ID" />
        <generator class="identity" />
    </id>
    <property name="name" type="java.lang.String">
        <column name="NAME" />
    </property>
    <property name="total" type="int">
        <column name="TOTAL" />
    </property>
    <property name="goal" type="int">
        <column name="GOAL" />
    </property>
</class>
</hibernate-mapping>

在用户界面中。哈佛商学院。xml我指定表是用户，但应用程序会查找表用户，这正是我实体的名称

用户。班级：

@Entity
//@Table(name="users")  
public class User {

@Id
private int id;
private String name;
private int total;
private int goal;

public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getTotal() {
    return total;
}
public void setTotal(int total) {
    this.total = total;
}
public int getGoal() {
    return goal;
}
public void setGoal(int goal) {
    this.goal = goal;
}

}

如果我从用户类中取消注释@Table注释，应用程序将查找正确的（users）表。为什么xml配置不起作用

下面您可以看到休眠助手类，以及我的main（）

冬眠性。java

public class HibernateUtilities {

private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;

static {
    try {
        Configuration conf = new Configuration().configure();
        conf.addAnnotatedClass(com.andrei.User.class);
        conf.configure();

        serviceRegistry = new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build();
        sessionFactory = conf.buildSessionFactory(serviceRegistry);
    } catch (HibernateException e) {
        System.out.println("problem creating session factory: " + e);
    }
}

public static SessionFactory getSessionFactory() {
    return sessionFactory;
}
}

Main。java

public static void main(String[] args) {
    Session session = HibernateUtilities.getSessionFactory().openSession();
    session.beginTransaction();

    User user = new User();
    user.setName("first name");
    user.setGoal(250);

    session.save(user);

    session.getTransaction().commit();
    session.close();
    HibernateUtilities.getSessionFactory().close();

}

以下是我的问题

1. 为什么xml配置不起作用？用户中指定的表名。哈佛商学院。xml是用户，但应用程序会查找表用户
2. 为什么<property name="hibernate.hbm2ddl.auto">create</property>不起作用

以下是我的日志：

Hibernate: drop table if exists users Dec 26, 2017 4:55:42 PM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@4612b856] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode. Hibernate: create table users (id integer not null, goal integer not null, name varchar(255), total integer not null, primary key (id)) type=MyISAM Dec 26, 2017 4:55:42 PM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@74eb909f] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode. Dec 26, 2017 4:55:42 PM org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException WARN: GenerationTarget encountered exception accepting command : Error executing DDL via JDBC Statement org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL via JDBC Statement at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:315) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135) at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155) at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72) at org.hibernate.internal.SessionFactoryImpl.(SessionFactoryImpl.java:313) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:452) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:710) at com.andrei.HibernateUtilities.(HibernateUtilities.java:21) at com.andrei.Program.main(Program.java:8) Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 'type=MyISAM' at line 1 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.Util.getInstance(Util.java:408) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:944) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2480) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2438) at com.mysql.jdbc.StatementImpl.executeInternal(StatementImpl.java:845) at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:745) at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ... 13 more

Dec 26, 2017 4:55:42 PM org.hibernate.tool.schema.internal.SchemaCreatorImpl applyImportSources INFO: HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@2826f61' Hibernate: insert into users (goal, name, total, id) values (?, ?, ?, ?) Dec 26, 2017 4:55:42 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions WARN: SQL Error: 1146, SQLState: 42S02 Dec 26, 2017 4:55:42 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions ERROR: Table 'protein_tracker.users' doesn't exist Dec 26, 2017 4:55:42 PM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release INFO: HHH000010: On release of batch it still contained JDBC statements Dec 26, 2017 4:55:42 PM org.hibernate.internal.ExceptionMapperStandardImpl mapManagedFlushFailure ERROR: HHH000346: Error during managed flush [org.hibernate.exception.SQLGrammarException: could not execute statement] Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:149) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:157) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:164) at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1443) at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:493) at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3207) at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2413) at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:156) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231) at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68) at com.andrei.Program.main(Program.java:17) 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:111) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:178) at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3013) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3513) at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:589) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:463) at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337) at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1437) ... 9 more Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'protein_tracker.users' doesn't exist at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at com.mysql.jdbc.Util.getInstance(Util.java:408) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:944) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2484) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858) at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2079) at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2013) at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5104) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1998) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175) ... 18 more

上面的一行：

Hibernate: create table users (id integer not null, goal integer not null, name varchar(255), total integer not null, primary key (id)) type=MyISAM

但在此之后，有一个例外，我不明白。在mySql中，没有创建表

非常感谢大家，祝大家新年快乐