Question

我正在使用eclipse kepler和PostgreSQL，我想将我的项目连接到服务器的PostgreSQL数据库，所以我从<jdbc.url>jdbc:postgresql://localhost:5433/${db.name}</jdbc.url>更改了我的网址到<jdbc.url>jdbc:postgresql://192.168.1.1:5433/${db.name}</jdbc.url> 但现在它开始给我错误

{ SEVERE：将上下文初始化事件发送到类org.springframework.web.context.ContextLoaderListener的侦听器实例的异常 org.springframework.beans.factory.BeanCreationException：使用名称＆＃39; org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor＃0＆＃39;创建bean时出错：bean的初始化失败;嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39; entityManagerFactory＆＃39;的bean时出错。在URL [file：/ E：/Java%20Project/DTSAdminPortal/common/target/classes/jpa.xml]中定义：init方法的调用失败;嵌套异常是javax.persistence.PersistenceException：[PersistenceUnit：hibernatePersistenceUnit]无法构建EntityManagerFactory 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:527）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:294）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:225）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:291）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）在org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors（AbstractApplicationContext.java:733） at org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:454）在org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:383）在org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader.java:283）在org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:111）在org.apache.catalina.core.StandardContext.listenerStart（StandardContext.java:4135）在org.apache.catalina.core.StandardContext.start（StandardContext.java:4630）在org.apache.catalina.core.ContainerBase.start（ContainerBase.java:1045）在org.apache.catalina.core.StandardHost.start（StandardHost.java:785）在org.apache.catalina.core.ContainerBase.start（ContainerBase.java:1045）在org.apache.catalina.core.StandardEngine.start（StandardEngine.java:445）在org.apache.catalina.startup.Embedded.start（Embedded.java:825）在org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer（AbstractRunMojo.java:558）在org.codehaus.mojo.tomcat.AbstractRunMojo.execute（AbstractRunMojo.java:255）在org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo（DefaultBuildPluginManager.java:106）在org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:208）在org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:153）在org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:145）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:84）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:59）在org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild（LifecycleStarter.java:183）在org.apache.maven.lifecycle.internal.LifecycleStarter.execute（LifecycleStarter.java:161）在org.apache.maven.DefaultMaven.doExecute（DefaultMaven.java:317）在org.apache.maven.DefaultMaven.execute（DefaultMaven.java:152）在org.apache.maven.cli.MavenCli.execute（MavenCli.java:555）在org.apache.maven.cli.MavenCli.doMain（MavenCli.java:214）在org.apache.maven.cli.MavenCli.main（MavenCli.java:158） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（Unknown Source） at sun.reflect.DelegatingMethodAccessorImpl.invoke（Unknown Source） at java.lang.reflect.Method.invoke（Unknown Source）在org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced（Launcher.java:289）在org.codehaus.plexus.classworlds.launcher.Launcher.launch（Launcher.java:229）在org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode（Launcher.java:415）在org.codehaus.plexus.classworlds.launcher.Launcher.main（Launcher.java:356） } { 引起：org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39; entityManagerFactory＆＃39;的bean时出错在URL [file：/ E：/Java%20Project/DTSAdminPortal/common/target/classes/jpa.xml]中定义：init方法的调用失败;嵌套异常是javax.persistence.PersistenceException：[PersistenceUnit：hibernatePersistenceUnit]无法构建EntityManagerFactory 在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1455）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:519）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:294）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:225）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:291）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197） at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType（DefaultListableBeanFactory.java:424）在org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors（BeanFactoryUtils.java:277） at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators（PersistenceExceptionTranslationInterceptor.java:139）在org.springframework.dao.support.PersistenceExceptionTranslationInterceptor。（PersistenceExceptionTranslationInterceptor.java：79）在org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor。（PersistenceExceptionTranslationAdvisor.java：70） at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory（PersistenceExceptionTranslationPostProcessor.java:103）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods（AbstractAutowireCapableBeanFactory.java:1475）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1443）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:519） ... 40多} {

引起：javax.persistence.PersistenceException：[PersistenceUnit：hibernatePersistenceUnit]无法构建EntityManagerFactory 在org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory（Ejb3Configuration.java:915）在org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory（HibernatePersistence.java:74）在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:268）在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:310）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1514）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1452） ......还有55个 } {引起：org.hibernate.HibernateException：＆＃39; hibernate.dialect＆＃39;必须在没有可用连接时设置在org.hibernate.dialect.resolver.DialectFactory.buildDialect（DialectFactory.java:106）在org.hibernate.cfg.SettingsFactory.buildSettings（SettingsFactory.java:148）在org.hibernate.cfg.Configuration.buildSettingsInternal（Configuration.java:2836）在org.hibernate.cfg.Configuration.buildSettings（Configuration.java:2832）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1843）在org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory（Ejb3Configuration.java:906） ... 60多}}

2014年2月4日下午2:21:01 org.apache.catalina.core.StandardContext start 严重：错误listenerStart

请帮我做什么，以便我可以访问我服务器的数据库

Answer 1

首先，您需要获得一些网络基础知识。测试数据库服务器是否可访问且没有防火墙阻止它（例如：使用telnet）。

然后，如果你向下看你的异常跟踪，它抱怨缺少hibernate.dialect。通常，这在META-INF / persistence.xml上设置如下：

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0">
   <persistence-unit name="sample">
      ..
      <properties>
         <property name="hibernate.dialect" value= "org.hibernate.dialect.PostgreSQLDialect"/>
         ...
      </properties>
   </persistence-unit>
</persistence>

使用服务器的PostgreSQL数据库

1 个答案: