无法建立JDBC连接 [英] Unable to make JDBC Connection
本文介绍了无法建立JDBC连接的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用Jersey和Hibernate创建Web API项目.当我昨天尝试时，一切正常.今天，它开始显示无法建立JDBC连接"错误.我尝试了所有可能的方法进行检查.我仍然无法解决它.任何帮助将不胜感激.
I am creating web API project using Jersey and Hibernate. When I tried yesterday all worked well. Today it started showing "Unable to make JDBC connection" error. I tried all possible ways to check it. Still I am not able to resolve it. Any help would be highly appreciated.
我正在如下创建会话:
SessionFactory sessionFactory;
ServiceRegistry serviceRegistry;
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
serviceRegistry = new ServiceRegistryBuilder().applySettings(
configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
Session session = sessionFactory.openSession();
这是我的数据库连接设置
And here is my database connection settings
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql//127.0.0.1/sampleDB</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
以下是异常的堆栈跟踪:
Below is the stack trace of the exception:
javax.servlet.ServletException: org.hibernate.HibernateException: Unable to make JDBC Connection [jdbc:mysql//127.0.0.1/sampleDB]
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:393)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:381)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:344)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221)
root cause
org.hibernate.HibernateException: Unable to make JDBC Connection [jdbc:mysql//127.0.0.1/sampleDB]
org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:77)
org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:106)
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.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260)
org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94)
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:1887)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
com.ps.rs.controller.Hello.sayHtmlHello(Hello.java:93)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:171)
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:195)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:104)
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:384)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:342)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101)
org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
org.glassfish.jersey.internal.Errors.process(Errors.java:315)
org.glassfish.jersey.internal.Errors.process(Errors.java:297)
org.glassfish.jersey.internal.Errors.process(Errors.java:267)
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:297)
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:254)
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1030)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:373)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:381)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:344)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221)
推荐答案
这可能对您有帮助
还添加用户名和密码
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/sampleDB</property>
<property name="hibernate.connection.username">yourUserNameForMysql</property>
<property name="hibernate.connection.password">passwordForMySql</property>
在Mysql 5.x之后，使用org.hibernate.dialect.MySQL5Dialect类
After Mysql 5.x use org.hibernate.dialect.MySQL5Dialect class
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/sampleDB</property>
<property name="hibernate.connection.username">yourUserNameForMysql</property>
<property name="hibernate.connection.password">passwordForMySql</property>
这篇关于无法建立JDBC连接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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