Question

我已经更换了我的电脑，我重新安装了所有：tomcat 8和6，netbeans 8，jdk 1.7，hibernate 4.3.4，但是当我运行网络应用程序时，我有这个错误。在过去用我的旧电脑我没有这个错误，但代码和lib是相同的，当我尝试从数据库中获取数据时会发生此错误

SEVERE: Servlet.service() for servlet Controller threw exception
org.dom4j.DocumentException: Connection timed out: connect Nested exception: Connection timed out: connect
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
..cut..
Nested exception: 
java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
..cut..
SEVERE: Servlet.service() for servlet Controller threw exception
java.lang.NoClassDefFoundError: Could not initialize class ..cut..HibernateUtil
at my.package.data.DataAccess.getUser(DataAccess.java:38)

这是HibernateUtil.java：

package my.package;

import org.hibernate.SessionFactory;
import org.hibernate.service.*;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {

    private static final SessionFactory sessionFactory = buildSessionFactory1();

    private static SessionFactory buildSessionFactory1() 
    {
        Configuration configuration = new Configuration().configure(); 
        StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder();
        serviceRegistryBuilder.applySettings(configuration.getProperties());
        ServiceRegistry serviceRegistry = serviceRegistryBuilder.build();
        return configuration.buildSessionFactory(serviceRegistry);
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static void shutdown() {
        getSessionFactory().close();
    }
}

Answer 1

我发现了问题：我已经在项目中添加了hibernate 3和hibernate 4，概率存在一些冲突。现在我只有hibernate 4并且没有问题

Answer 2

我们发现端口不可访问。在防火墙级别未打开端口80。请使用来自服务器的wget命令同时使用https和http。对于http，我们正在等待时间。因此，我们在防火墙级别添加了80端口，然后重新启动了jboss。它开始工作

Answer 3

如果您使用 .hbm.xml 文件升级 Hibernate 版本，请不要忘记升级您的 DTD

例如http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd => http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd

控制台中的错误是ERROR org.hibernate.util.DTDEntityResolver Don't use old DTDs, read the Hibernate 3.x Migration Guide!

org.dom4j.DocumentException：连接超时：连接和嵌套异常：连接嵌套异常

3 个答案: