无法在Java应用程序中连接到SQLServer数据库

我已经在我正在尝试开发的JSF Web应用程序中连接到我的数据库。 使用Windows 7，NetBeans 6.9.1，SQLServer 2008，Glassfish 3.3。

我正在使用从我的XP系统复制的sqljdbc4.jar驱动程序，我已成功连接到SQLServer 2005。

我已经validationSQLServer 2008正在我的系统上运行，我可以使用我尝试在应用程序中使用的用户名和密码通过SQL Server Management Studio连接到数据库。 SQL Server配置管理器显示IP连接端口为1433.所以我认为我的数据库设置正确。

我认为我正在做的事情，但我只是无法连接到数据库。 有没有人有任何建议，为什么这是失败的，我可以检查什么？

谢谢。

这是我的连接代码：

public void connectDB() { try { String connectionUrl = "jdbc:sqlserver://localhost:1433;databaseName=ROVRDEV;user=rovrdevuser;password=rovrdevuser"; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); Connection con = DriverManager.getConnection(connectionUrl); System.out.println("Database connection = "+con ); } catch( Exception e ) { e.printStackTrace(); System.out.println( "Error connecting to database. Error: "+e.getMessage() ); } } 

当我尝试运行它时，我在服务器日志中得到以下exception：

 SEVERE: com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.". at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:170) at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1049) at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:833) at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:716) at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:841) at java.sql.DriverManager.getConnection(DriverManager.java:582) at java.sql.DriverManager.getConnection(DriverManager.java:207) at rmsbackoffice.SessionBean1.connectDB(SessionBean1.java:130) at rmsbackoffice.SessionBean1.doInit(SessionBean1.java:107) at rmsbackoffice.SessionBean1.beforePhase(SessionBean1.java:88) at rmsbackoffice.org$jboss$weld$bean-web-ManagedBean-class_rmsbackoffice$SessionBean1_$$_WeldClientProxy.beforePhase(org$jboss$weld$bean-web-ManagedBean-class_rmsbackoffice$SessionBean1_$$_WeldClientProxy.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.el.parser.AstValue.invoke(AstValue.java:234) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at javax.faces.component.UIViewRoot.notifyPhaseListeners(UIViewRoot.java:1050) at javax.faces.component.UIViewRoot.notifyBefore(UIViewRoot.java:845) at javax.faces.component.UIViewRoot.encodeBegin(UIViewRoot.java:959) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1754) at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:401) at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:662) 

Answer 1

 The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port. 

检查您的SQL Server设置是否允许接受TCP / IP连接。 启用TCP / IP并重新启动SQL Server。 然后再次测试您的代码。

Answer 2

在Enterprise Manager中，转到Properties-> Connections并选中“允许远程连接到此服务器”。 还要确保在Windows防火墙中未阻止端口1433。 最后，我将停止使用Microsoft JDBC jar。 我有更好的运气jTDS 。

Answer 3

我刚刚尝试用IP更改主机名

 "jdbc:sqlserver://localhost:1433;databaseName=ROVRDEV;user=rovrdevuser;password=rovrdevuser"; 

成为

 "jdbc:sqlserver://127.0.0.1:1433;databaseName=ROVRDEV;user=rovrdevuser;password=rovrdevuser"; 

也许只是因为这一个 – >

Answer 4

您的连接字符串中缺少instanceName。

如果您的SQL服务器实例名称是“SQL2005”那么它应该像…..

 Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;instanceName=SQL2005;databaseName=ROVRDEV","rovrdevuser","rovrdevuser"); 

Answer 5

还检查运行在非服务上的Sql Server Browser – > sql server browser – > start