Question

我正在使用通过sqljdbc4.jar驱动程序连接到SQL Server 2012的NetBeans 8.2。

我创建一个名为Provider的接口Java类：

public interface Provider {
    String driver="com.microsoft.sqlserver.jdbc.SQLServerDriver";
    String url="jdbc:sqlserver://DESKTOP-MF8EEF8;DatabaseName=db_Class_Payment;integrated Security=false;";
    String username="sa;";
    String password="123;";
}

然后将Provider调用到名为DBFactory的连接类中。

public class DBFactory {
    static Connection con;
    static
    {
        try
        {
           Class.forName(driver);
           con = DriverManager.getConnection(url,username,password);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    public static Connection getcon()
    {
        return con;
    }
}

然后我用下面的代码进行测试：

if(con==null){
    JOptionPane.showMessageDialog(null, "Connecting failed");
}else{
    JOptionPane.showMessageDialog(null, "Connecting successfully.");
}

该过程使我连接失败或连接null并出现错误msg;

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host DESKTOP-MF8EEF8, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
    at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
    at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2243)
    at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:491)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1309)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at Class.DBFactory.<clinit>(DBFactory.java:18)
    at Frame.Home.<init>(Home.java:16)
    at Frame.Home$4.run(Home.java:449)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
    BUILD SUCCESSFUL (total time: 23 seconds)

我已经将sqljdbc4.jar库添加到项目中的库中。

它仍然给出错误结果。

Answer 1

您的连接url错误。

  integrated Security=false;

应该是

  integratedSecurity=false;

阅读Building the Connection URL会变得更好。

如何修复“连接到SQL Server 2012”错误？

1 个答案: