MySQL connectivity (hours wasted)

**ribbs2521** · 10-16-2009, 11:25 PM

I have been searching through google for hours and tried everything I've found and still can't seem to get rid of this SQLException (No suitable driver found for mysql.//dbaddress/schema.......)

Here is a snippet of my code, if anyone could help that would be great, I'm at a loss.

Java Code:

	public Connection getConnection(String url) throws SQLException, IOException, ClassNotFoundException
	{

		try
		{
			Class.forName("com.mysql.jdbc.Driver");
		}
		catch (ClassNotFoundException e)
		{
                        System.out.println("Class Not Found");
                        System.exit(1);
		}
		
		return DriverManager.getConnection(url, "BerlGeof","");

	}

**masijade** · 10-16-2009, 11:43 PM

Well, maybe we could, if you showed us the url you used.

**ribbs2521** · 10-17-2009, 02:52 AM

Sorry, I didn't think the url mattered since the error was that the class wasn't found. I figured it was something with the classpath and/or a jar file not being found.

jdbc:mysql://111.11.11.1/Schema_Name

Here is the full error too:

Java Code:

java.sql.SQLException: No suitable driver found for jdbc:mysql://111.11.11.1/Sch
ema_Nameuser=BerlGeof&password=
        at java.sql.DriverManager.getConnection(DriverManager.java:602)
        at java.sql.DriverManager.getConnection(DriverManager.java:207)
        at DB_Connection.getConnection(DB_Connection.java:74)
        at DB_Connection.<init>(DB_Connection.java:29)
        at EmployeeDash1.performComputation(EmployeeDash1.java:197)
        at EmployeeDash1.actionPerformed(EmployeeDash1.java:167)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
95)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242
)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6134)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5899)
        at java.awt.Container.processEvent(Container.java:2023)
        at java.awt.Component.dispatchEventImpl(Component.java:4501)
        at java.awt.Container.dispatchEventImpl(Container.java:2081)
        at java.awt.Component.dispatchEvent(Component.java:4331)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301
)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)

        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)
        at java.awt.Container.dispatchEventImpl(Container.java:2067)
        at java.awt.Window.dispatchEventImpl(Window.java:2458)
        at java.awt.Component.dispatchEvent(Component.java:4331)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

**masijade** · 10-17-2009, 09:49 AM

No. The error was not ClassNotFound, it was "no suitable driver found". That usually means that you either typed the url wrong, or that you loaded one driver but tried to use another.

Show the code with the url, as this

Java Code:

No suitable driver found for jdbc:mysql://111.11.11.1/Sch
ema_Nameuser=BerlGeof&password=

makes it look like you have a space in the table name, or that you forgot a ? between the table name and the user name.

**ribbs2521** · 10-17-2009, 03:18 PM

Bear with me, my code is not complete as my main concern is getting the driver to connect.

Here is the method that is creating the connection object.
Sorry for the break in the name, I copied the error from the CMD line which put the line breaks in there itself. I left my schema name in there this time and just removed the IP. The port hasn't always been in there, I added it last night in an attempt to fix this issue but no luck. Lastly, as you can see in my getConnection method that I'm not creating the full URL with username and pass, I'm using the three arg method. The method is compiling that, should there be a ? between username and the schema name? I can try sending the URL as one whole string including the username and pass with the ?.

Java Code:

	public void performComputation()
	{
		try
		{
			String strResults = null;
			DB_Connection mysqlDB = new DB_Connection("jdbc:mysql://111.11.11.1:3306/dashboard_data");
			//DataBase db = new DataBase();

			//Get employee name, tokenize it into format that matches the report
			StringTokenizer st = new StringTokenizer((String)jcbEmployee.getSelectedItem());
			firstName = st.nextToken();
			lastName = st.nextToken();
			String employee = lastName + ", " + firstName;

			System.out.println("Gathering data that matches employee " + employee);

			sqlQuery1 = "Select Employee, OperationCode, TransactionQuantity From Resources " +
						"where Employee = '" + employee + "'";

			mysqlDB.showTablesInfo("person2");
			//db.showTablesInfo(tableName);
			System.out.println("\n---- Query 1 ----");
			//strResults = db.createQuery(sqlQuery1, 3);
			//jtResults.insert(strResults, 0);
			//db.close();
		}
		catch (SQLException ex)
		{
			while (ex != null)
			{
				ex.printStackTrace();
				ex = ex.getNextException();
			}
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
		catch (Exception ex)
		{
			ex.printStackTrace();
		}
	}

**masijade** · 10-17-2009, 03:32 PM

The url is okay and the Class name is okay, so, is the mysql jarfile on the classpath when the program starts, or are you creating a classloader and adding the jarfile later?

**ribbs2521** · 10-17-2009, 03:48 PM

OK, I'm going to go insane. I am using a different computer than last night and it's working. I will have to try again on Monday when I have access to the other computer again. I will post what my classpath contents are when I get back to the other Computer.

**masijade** · 10-17-2009, 03:57 PM

All I can say is, take a close look at the url used on that "other computer".

**ribbs2521** · 10-19-2009, 01:53 PM

Interesting, it appears it was because I had the 5.0.8 jar file driver. The classpath was correct on the original PC but noticed it was 5.0.8 connector. I downloaded 5.1.0 and changed the classpath and now it works fine. I wouldn't think an old version would cause this issue I wasn't using any fancy SQL statements, just a SELECT * with no criteria.

**sparlay_pk** · 10-19-2009, 03:00 PM

Plz help me i hav a problem with this code...
error is class not found exception ... com.microsoft.sqlserver.jdbc.SQLServerDriver

try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLSer verDriver");

}

catch(Exception ex)
{
ex.printStackTrace();
}

**PhHein** · 10-19-2009, 03:14 PM

Java Code:

Class.forName("com.microsoft.sqlserver.jdbc.SQLSer verDriver");

The blank cannot be part of a class name in SQLServerDriver. If that was a typo, the driver is not on your calsspath. Add it.

And why do you hijack a completely unrelated thread instead of starting a new one?

**sparlay_pk** · 10-20-2009, 05:45 AM

Plz help me i hav a problem with this code...
error is class not found exception ... com.microsoft.sqlserver.jdbc.SQLServerDriver.

try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLSer verDriver");
}

catch(Exception ex)
{
ex.printStackTrace();
}

The space you see in (SQLServ erDriver) is not the part of origional file, it's due to the editor.
I have installed MS SQL 2005 ....