无法在Java应用程序中连接到SQLServer数据库

Question

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。

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

我已经验证SQLServer 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？

感谢。

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异常：

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。然后再次测试你的代码。

Answer 2

在Enterprise Manager中，转到Properties-＆gt; Connections并选中“允许远程连接到此服务器”。还要确保Windows防火墙中没有阻止端口1433。最后，我将停止使用Microsoft JDBC jar。我对jTDS的运气好多了。

Answer 3

我刚尝试用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";

也许只是因为这个 - ＆gt;

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

还要检查运行的Sql Server Browser 服务 - ＆gt; sql server browser - ＆gt; start