Question

我的项目是java ee web应用程序我将hibernate用于数据库目的。我现在将一个数据库连接到这个应用程序我需要将另一个mysql数据库连接到这个项目我该怎么办呢？你能给我正确的链接或解决方案吗？高级

我使用了第一个答案，但是它给了你这个例外，请你帮我解决这个问题 {16：02：39,552 WARN SettingsFactory - 无法获取连接元数据 java.sql.SQLException：没有为hsqldb找到合适的驱动程序：hsql：//127.0.0.1：9001 / openreports at java.sql.DriverManager.getConnection（Unknown Source） at java.sql.DriverManager.getConnection（Unknown Source）在org.hibernate.connection.DriverManagerConnectionProvider.getConnection（DriverManagerConnectionProvider.java:110）在org.hibernate.cfg.SettingsFactory.buildSettings（SettingsFactory.java:72）在org.hibernate.cfg.Configuration.buildSettings（Configuration.java:1881）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1174）在org.efs.openreports.actions.admin.ServerDataAction。（ServerDataAction.java:23） at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method） at sun.reflect.NativeConstructorAccessorImpl.newInstance（Unknown Source） at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（Unknown Source） at java.lang.reflect.Constructor.newInstance（Unknown Source）在org.springframework.beans.BeanUtils.instantiateClass（BeanUtils.java:84）在org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate（SimpleInstantiationStrategy.java:71）在org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor（ConstructorResolver.java:150）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor（AbstractAutowireCapableBeanFactory.java:745）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowire（AbstractAutowireCapableBeanFactory.java:253）在com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean（SpringObjectFactory.java:145）在com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean（SpringObjectFactory.java:128）在com.opensymphony.xwork2.ObjectFactory.buildBean（ObjectFactory.java:143）在com.opensymphony.xwork2.ObjectFactory.buildAction（ObjectFactory.java:113）在com.opensymphony.xwork2.DefaultActionInvocation.createAction（DefaultActionInvocation.java:275）在com.opensymphony.xwork2.DefaultActionInvocation.init（DefaultActionInvocation.java:365）在com.opensymphony.xwork2.DefaultActionInvocation.access $ 000（DefaultActionInvocation.java:38）在com.opensymphony.xwork2.DefaultActionInvocation $ 1.doProfiling（DefaultActionInvocation.java:83）在com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile（UtilTimerStack.java:455）在com.opensymphony.xwork2.DefaultActionInvocation。（DefaultActionInvocation.java:74）在com.opensymphony.xwork2.DefaultActionProxy.prepare（DefaultActionProxy.java:189）在org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy（StrutsActionProxyFactory.java:41）在org.apache.struts2.dispatcher.Dispatcher.serviceAction（Dispatcher.java:494）在org.apache.struts2.dispatcher.FilterDispatcher.doFilter（FilterDispatcher.java:419）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206） at org.displaytag.filter.ResponseOverrideFilter.doFilter（ResponseOverrideFilter.java:125）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:233） at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:191）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:127） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:102）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:109）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:293）在org.apache.coyote.http11.Http11Processor.process（Http11Processor.java:859）在org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process（Http11Protocol.java:602）在org.apache.tomcat.util.net.JIoEndpoint $ Worker.run（JIoEndpoint.java:489）在java.lang.Thread.run（未知来源） 16：02：39,610 WARN SessionFactoryObjectFactory - InitialContext没有实现EventContext这是我的错误msg什么是共鸣这可以请你帮助我..........}

Answer 1

要连接两个数据库，您需要两个SessionFactory

<强>提示：

 SessionFactory sessionFactory1 = new  Configuration().configure("config1.cfg.xml").buildSessionFactory();
 SessionFactory sessionFactory2 = new Configuration().configure("config2.cfg.xml").buildSessionFactory();


void yourMethod() {
        try {
            session = sessionFactory1.openSession();
            // here play with session of sessionFactory1
            session.close();

            session = sessionFactory2.openSession();
           // here play with session of sessionFactory2
            session.close();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            System.out.println("It works");
        }
    }

如果您使用的是弹簧，请参阅load two database

如何将两个数据库连接到hibernate eclipse web项目？

1 个答案: