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休眠给出错误错误，因为没有互联网连接时"Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not se



有网络连接时Hibernate工作正常。但是当没有网络连接时，它会显示

对DialectResolutionInfo的访问不能在"休眠"时为空。未设置方言

错误。我认为我的应用程序在运行时试图访问互联网连接。我得到的详细错误如下:-

Dec 22, 2015 6:17:43 PMorg.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiatorinitiateService警告:HHH000181:没有遇到适当的连接提供程序，假设应用程序将提供连接初始SessionFactory创建失败。org.hibernate. hibernateexception: Access to当'hibernate '时，DialectResolutionInfo不能为空。方言没有设定org.hibernate.HibernateException:对DialectResolutionInfo的访问不能为空。方言没有设定org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect (DialectFactoryImpl.java: 104)org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect (DialectFactoryImpl.java: 71)org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure (JdbcServicesImpl.java: 209)org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService (StandardServiceRegistryImpl.java: 111)org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService (AbstractServiceRegistryImpl.java: 234)org.hibernate.service.internal.AbstractServiceRegistryImpl.getService (AbstractServiceRegistryImpl.java: 206)org.hibernate.cfg.Configuration.buildTypeRegistrations (Configuration.java: 1885)org.hibernate.cfg.Configuration.buildSessionFactory (Configuration.java: 1843)在com.pos.admin.admin_module.admin_module.hibernatefiles.hibernate.HibernateUtil.buildSessionFactory (HibernateUtil.java: 32)com.pos.admin.admin_module.admin_module.hibernatefiles.hibernate.HibernateUtil.getSessionFactory (HibernateUtil.java: 44)在com.pos.admin.admin_module.main.AdminModule.start (AdminModule.java: 21)在com.sun.javafx.application.LauncherImpl.lambda launchApplication1 163美元(未知源)在com.sun.javafx.application.PlatformImpl.lambda runAndWait 176美元(未知源)在com.sun.javafx.application.PlatformImpl.lambda零174美元(未知源)在java.security.AccessController。doPrivileged(本地方法)在com.sun.javafx.application.PlatformImpl.lambda runLater 175美元(未知源)$Future.run(来源未知)在com.sun.glass.ui.win.WinApplication。_runLoop(本地方法)在com.sun.glass.ui.win.WinApplication。λ零149美元(未知来源)在java.lang.Thread.run(来源未知)应用程序启动方法中出现异常java.lang.reflect.InvocationTargetException在sun.reflect.NativeMethodAccessorImpl。invoke0(本地方法)在sun.reflect.NativeMethodAccessorImpl。调用(未知源)在sun.reflect.DelegatingMethodAccessorImpl。调用(未知源)在java.lang.reflect.Method。调用(未知源)com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(未知源)com.sun.javafx.application.LauncherImpl.launchApplication(未知源)在sun.reflect.NativeMethodAccessorImpl。invoke0(本地方法)在sun.reflect.NativeMethodAccessorImpl。调用(未知源)在sun.reflect.DelegatingMethodAccessorImpl。调用(未知源)在java.lang.reflect.Method。调用(未知源)在sun.launcher.LauncherHelper FXHelper美元。主要(未知源)产生原因:java.lang.RuntimeException:应用程序启动方法异常com.sun.javafx.application.LauncherImpl.launchApplication1(未知源)在com.sun.javafx.application.LauncherImpl.lambda launchApplication 156美元(未知源)在java.lang.Thread.run(来源未知)原因:java.lang.ExceptionInInitializerErrorcom.pos.admin.admin_module.admin_module.hibernatefiles.hibernate.HibernateUtil.buildSessionFactory (HibernateUtil.java: 39)com.pos.admin.admin_module.admin_module.hibernatefiles.hibernate.HibernateUtil.getSessionFactory (HibernateUtil.java: 44)在com.pos.admin.admin_module.main.AdminModule.start (AdminModule.java: 21)在com.sun.javafx.application.LauncherImpl.lambda launchApplication1 163美元(未知源)在com.sun.javafx.application.PlatformImpl.lambda runAndWait 176美元(未知源)在com.sun.javafx.application.PlatformImpl.lambda零174美元(未知源)在java.security.AccessController。doPrivileged(本地方法)在com.sun.javafx.application.PlatformImpl.lambda runLater 175美元(未知源)$Future.run(来源未知)在com.sun.glass.ui.win.WinApplication。_runLoop(本地方法)在com.sun.glass.ui.win.WinApplication。λ零149美元(未知来源)…1由:org.hibernate.HibernateException: Access to DialectResolutionInfo不能为空引起。方言没有设定org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect (DialectFactoryImpl.java: 104)org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect (DialectFactoryImpl.java: 71)org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure (JdbcServicesImpl.java: 209)org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService (StandardServiceRegistryImpl.java: 111)org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService (AbstractServiceRegistryImpl.java: 234)org.hibernate.service.internal.AbstractServiceRegistryImpl.getService (AbstractServiceRegistryImpl.java: 206)org.hibernate.cfg.Configuration.buildTypeRegistrations (Configuration.java: 1885)org.hibernate.cfg.Configuration.buildSessionFactory (Configuration.java: 1843)在com.pos.admin.admin_module.admin_module.hibernatefiles.hibernate.HibernateUtil.buildSessionFactory (HibernateUtil.java: 32)…11个应用程序运行异常com. poss .admin.admin_module.main. adminmodule

我的pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.pos.admin.admin_module</groupId>
<artifactId>admin_module</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>admin_module</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<!--    <build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build> -->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--        <dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.0.5.Final</version>
</dependency> -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.5.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.37</version>
</dependency>
<!-- <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> 
<version>4.3.5.Final</version> </dependency> -->
<!-- <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> 
<version>5.2.2.Final</version> </dependency> -->
<!-- <dependency> <groupId>javax.el</groupId> <artifactId>javax.el-api</artifactId> 
<version>2.2.4</version> </dependency> <dependency> <groupId>org.glassfish.web</groupId> 
<artifactId>javax.el</artifactId> <version>2.2.4</version> </dependency> -->
</dependencies>
</project>

我的hibernate配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/point_of_sales</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">
</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.show_sql">true</property>
<!-- 
<property name="hbm2ddl.auto">update</property>  -->
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.Category"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.ProductHeader"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.PurchaseDetail"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.PurchaseHeader"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.SalesDetail"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.SalesHeader"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.Settings"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.Unit"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.User"/>
<mapping class="com.pos.admin.admin_module.hibernatefiles.dto.Supplier"/>
<!--         <mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.Supplier"/>
<mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.PurchaseHeader"/>
<mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.ProductHeader"/>
<mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.Category"/>
<mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.Unit"/> -->
<!--       <mapping class="com.pos.storekeeper.storekeeper_module.hibernateFiles.dto.User"/> -->
<!-- <mapping class="com.pos.admin.admin_module.admin_module.main.Cart1"/> --> 
</session-factory>
</hibernate-configuration>

创建Configuration和Session对象的HibernateUtil类

public class HibernateUtil {
private static SessionFactory sessionFactory;
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate-annotation.cfg.xml
Configuration configuration = new Configuration();
try{
configuration.configure("hibernate.cfg.xml");
}catch(Exception e){
System.out.println("Exception while handling configureation file :" + e.getMessage());
System.out.println("asfsdaf " + configuration);
}
System.out.println("Hibernate Annotation Configuration loaded");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
System.out.println("Hibernate Annotation serviceRegistry created");
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
}
catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
ex.printStackTrace();
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
if(sessionFactory == null) sessionFactory = buildSessionFactory();
return sessionFactory;
}
public static void closeSessionFactory(){
if(!sessionFactory.isClosed()){
System.out.println("Closing SessionFactory");
sessionFactory.close();
}
}
}

我想解决这个问题，因为互联网连接不能总是可用。谢谢你

要离线使用hibernate，您必须更改XML映射和配置文件中的DTD。确保hibernate jar在你的类路径

中
for xml mapping file
<!DOCTYPE hibernate-mapping SYSTEM 
"classpath://org/hibernate/hibernate-mapping-3.0.dtd">

配置文件:

<!DOCTYPE hibernate-configuration SYSTEM 
"classpath://org/hibernate/hibernate-configuration-3.0.dtd">

http://www.journaldev.com/2959/how-to-configure-hibernate-cfg-xml-to-work-offline

尝试删除SessionFactoryfrom this:

SessionFactory  sessionFactory = configuration.buildSessionFactory(serviceRegistry);

:

sessionFactory = configuration.buildSessionFactory(serviceRegistry);

或者像这样添加buildSessionFactory():

private static SessionFactory sessionFactory = buildSessionFactory();

您的Hibernate版本一旦能够建立JDBC连接，就能够自动配置方言。如果您不能建立JDBC连接，那可能就是问题所在。

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