我试图使用hibernate在H2 db中插入模拟数据，但我面临以下错误
引起：java.lang.IllegalStateException：文件被锁定：nio：/Development/hiber/data/contactmgr.mv.db [1.4.192 / 7]
，之前我认为这是因为用户名和密码属性，但即使从hibernate.cfg.xml中删除它，我偶然发现了这个错误。
线程“main”中的异常java.lang.ExceptionInInitializerError由以下原因引起：org.hibernate.exception.JDBCConnectionException：在org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator上调用Driver＃connect时出错。$ 1 $ 1.convert（BasicConnectionCreator.java： 122）org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException（BasicConnectionCreator.java:140）org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection（DriverConnectionCreator.java:58）at org位于org.hibernate.boot的org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure（DriverManagerConnectionProviderImpl.java:106）中的.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection（BasicConnectionCreator.java:75） .registry.internal.StandardServiceRegistryImpl.configureService（StandardServiceRegistryImpl.java:111）at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService（AbstractServi） ceRegistryImpl.java:234）org.hibernate上的org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:206）org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess（JdbcServicesImpl.java:260）位于org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService的org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService（StandardServiceRegistryImpl.java:111）中的.engine.jdbc.internal.JdbcServicesImpl.configure（JdbcServicesImpl.java:94） （AbstractServiceRegistryImpl.java:234）org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:206）org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices（DefaultIdentifierGeneratorFactory.java:147）org。 org.hibernate.service.internal.AbstractServiceRegistryImpl.in中的hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies（AbstractServiceRegistryImpl.java:272） itializeService（AbstractServiceRegistryImpl.java:231）位于org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:206）的org.hibernate.metamodel.source.internal.MetadataImpl。（MetadataImpl.java:120）org。 hibernate.metamodel.source.internal.MetadataBuilderImpl.build（MetadataBuilderImpl.java:123）位于com.hibernate.demo.Application.buildSesssionFactory上的org.hibernate.metamodel.MetadataSources.buildMetadata（MetadataSources.java:151）（Application.java： 46）在com.hibernate.demo.Application。（Application.java:17）引起：org.h2.jdbc.JdbcSQLException：数据库可能已在使用中：null。可能的解决方案：关闭所有其他连接;在org.h2.mvstore的org.h2.message.DbException.get（DbException.java:168）的org.h2.message.DbException.getJdbcSQLException（DbException.java：345）处使用服务器模式[90020-192]。 db.MVTableEngine $ Store.convertIllegalStateException（MVTableEngine.java:187）org.h2.mvstore.db.MVTableEngine $ Store.open（MVTableEngine.java:167）org.h2.mvstore.db.MVTableEngine.init（MVTableEngine。 java：99）org.h2.engine.Database.getPageStore（Database.java:2463）atg.h2.engine.Database.open（Database.java:692）atg.h2.engine.Database.openDatabase（Database .java：270）org.h2.engine.Database。（Database.java:264）atg.h2.engine.Engine.openSession（Engine.java:64）atg.h2.engine.Engine.openSession（Engine） .java：176）org.h2.engine.Engine.createSessionAndValidate（Engine.java:154）org.h2.engine.Engine.createSession（Engine.java:137）atg.h2.engine.Engine.createSession（ Engine.java:27）org.h2.jdbc.JdbcConnection上的org.h2.engine.SessionRemote.connectEmbeddedOrServer（SessionRemote.java:349）。（JdbcConnec在org.hibernate.engine.jdbc.connections.internal的org.h2.jdbc.JdbcConnection。（JdbcConnection.java:102）org.h2.Driver.connect（Driver.java:72）处.ed.java：118。 DriverConnectionCreator.makeConnection（DriverConnectionCreator.java:55）... 19更多引起：java.lang.IllegalStateException：文件被锁定：nio：/Development/hiber/data/contactmgr.mv.db [1.4.192 / 7] org.h2.mvstore.DataUtils.newIllegalStateException（DataUtils.java:773）org.h2.mvstore.FileStore.open（FileStore.java:172）atg.h2.mvstore.MVStore。（MVStore.java:344）在org.h2.mvstore.MVStore $ Builder.open（MVStore.java:2893）org.h2.mvstore.db.MVTableEngine $ Store.open（MVTableEngine.java:154）... 34更多信息
这是我正在使用的hibernate.cfg.xml文件：
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.h2.Driver</property>
<property name="connection.url">jdbc:h2:./data/contactmgr</property>
<property name="hibernate.default_schema">PUBLIC</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.H2Dialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
<property name="show_sql">true</property>
<mapping class="com.hibernate.demo.model.Contact"/>
</session-factory>
</hibernate-configuration>
以下是我的主要课程：
public class Application {
//Session factory
private static final SessionFactory sessionFactory = buildSesssionFactory();
public static void main(String[] args) {
Contact contact = new Contact.ContactBuilder("Bob", "marley").withEmail("[email protected]").withPhone(5859789791L).build();
//Open a Session
Session session = sessionFactory.openSession();
//Begin a Transaction
session.beginTransaction();
//Use the session to save the contact
session.save(contact);
//Commit the transaction
session.getTransaction().commit();
// Close the session
session.close();
}
private static SessionFactory buildSesssionFactory() {
// Create a StandardServiceRegistry
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
final ServiceRegistry registry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
return new MetadataSources(registry).buildMetadata().buildSessionFactory();
抛出此异常是因为H2 db文件已在使用中。 （可能是因为你的db文件存在一些不一致或类似的问题）
我建议如下：
如果您不希望对数据库进行任何锁定，则可以按如下方式配置数据库连接URL：
<property name="connection.url">jdbc:h2:./data/contactmgr;DB_CLOSE_ON_EXIT=TRUE;FILE_LOCK=NO</property>
文件：