I am trying to connect to the database on the remote MS SQL server, using the provided connection string. The connection string is as follows:
data source=qsss.gar.de\SQL2012,3000;initial catalog=City;persist security info=True;user id=usr;password=usr##2009;
I understand I should have the suitable drivers, so I have downloaded the SQL Server drivers from microsoft.com/download/en/details.aspx?id=21599
, and added them to the build path of my project. Those are sqljdbc.jar and sqljdbc4.jar.
I am just using this test code to see if the connection is established.
public static void main(String[] args) throws Exception {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
Connection connection = DriverManager.getConnection(
"qsss.gar.de\SQL2012,3000;initial catalog=City;persist security info=True;user id=usr;password=usr##2009;");
System.out.println("Connected!");
}
Doing so, I get an error: Java Runtime Environment (JRE) version 1.8 is not supported by this driver. Use the sqljdbc4.jar class library, which provides support for JDBC 4.0.
What am I doing wrong here?
Do not add both jars to your classpath since they both contain the com.microsoft.sqlserver.jdbc.SQLServerDriver-class and in your situation the program loads the one from sqljdbc.jar. Remove sqljdbc.jar from your classpath and only add sqljdbc4.jar so your program will always load the correct driver-version.
Related
I have created a heroku posgresql database and I am trying to connect my Android app to this database. I am using Android Studio for making the Android app. I have used the following code for creating the connection:
try {
Class.forName("org.postgresql.Driver");
Connection db = DriverManager.getConnection(dbUrl);
}
catch(Exception e){
//handles exception
}
When I execute this code I get the following error: Something unusual has occurred tot cause the driver to fail. Please report this exception.
This is the driver I use: posgresql-42.2.12
The heroku database has version 12.2
Android studio has java version 1.8
I am not sure if the driver is in the classpath and I am not sure how to check this. I added the driver to the project this way: app > New > Module > Import .JAR/.AAR Package (here I selected the driver).
To check if the Driver is registered in DriverManager I used this code:
Enumeration<Driver> drivers = DriverManager.getDrivers();
drivers.nextElement().getClass().getName();
This gives: org.postgresql.Driver
To check if the Driver understandes the URL I used this code:
DriverManager.getDriver(dbUrl).getClass().getName();
This also gives org.posgresql.Driver so I think the Driver is registered to the DriverManager and should be able to connect to the database using the URL. I just really don't know why I keep getting an error when I try to connect with the database.
So why does the error occur and how can I resolve the issue?
My first guess would be a malformed connection string. Are you using a proper JDBC URL (i.e. it starts with jdbc:) for dbUrl? Also make sure you include sslmode=require.
In addition, please be aware that the database URL is managed by Heroku and will change under certain circumstances. You can read more about using Heroku Postgres from outside of Heroku in this DevCenter article.
I simply want to use SQL Server database in my HTTP Servlet program but my program can't seem to connect to the database. It gives me the following error:
No suitable driver found for
jdbc:sqlserver://localhost:1433;databaseName=Bookyard;integratedSecurity=true;
This is my connection method.
package practice.bookyard.server.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Database {
public static Connection getConnection() {
String url = "jdbc:sqlserver://(LocalDb)\\MSSQLLocalDB:1433;databaseName=Bookyard;integratedSecurity=true;";
Connection connection = null;
try {
connection = DriverManager.getConnection(url);
} catch (SQLException e) {
e.printStackTrace();
}
return connection;
}
}
I had the sever name as localhost:1433 earlier but I changed it to the SQL Server instance name (LocalDb)\\MSSQLLocalDB:1433 but it still seems to pick up the old name.
Also, I am not sure how to provide the right connection string when connecting to SQL Server localdb.
I am using Eclipse for Java EE, Mars 2, and I downloaded Microsoft JDBC drivers for SQL 6.0 from this website.
I ran the installation, unzipped the contents of the resulting folder. Then, I added the sqljdbc42.jar file to the build path as I am targeting JDK 1.8.
UPDATE
Upon Scary Wombat's suggestion, I have also added the path to the sqljdbc42.jar file to my classpath.
However, I still get the same error.
I am pretty confident this is a reflection issue, in that the type loader isn't able to resolve the driver type from my connection string. Which means, the connection string syntax I am using is wrong.
I changed my connection string to read as follows:
String url = "jdbc:sqlserver://localhost:1433;
instance=(LocalDb)\\MSSQLLocalDB;
databaseName=Bookyard;integratedSecurity=true;";
However, I still not only get the same error but the exception message I receive still has my old connection string. So, clearly, there's also some caching going on, I just don't know where. Who is caching my connection string and how do I refresh / clear that cache?
Could you please tell me how to provide a SQL Server instance name if I am connecting to localdb and not on the main SQL Server instance?
As #ScaryWombat and #JozefChocholacek had hinted, it turned out to be a class path issue. Apparently, you have to copy and paste just the sqljdbc42.jar file, and this file only directly into the WEB-INF\lib folder and not within any sub-folder.
I did that it still gave me that error.
That was because the WEB-INF folder structure, when I viewed it in the Project Explorer, still had the old folder structure. So, I right-clicked on the WEB-INF folder in the Project Explorer and selected the Refresh command.
I also updated my environmental variable CLASSPATH to point it to the WEB-INF folder and that error went away.
you can do like below
String url = "jdbc:sqlserver://YOUR PC NAME;instanceName=SQLEXPRESS;DatabaseName=dbname;integratedSecurity=true";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection myCon = DriverManager.getConnection(url);
note :however its not necceaary for new version of jdbc driver to load driver class manually using class.forname
I have to define a new Driver in the Netbeans "Services" Tab
Services->Databases->Drivers->new Driver...
because I want use the "Entity Classes from Database"-Wizard in context with UCanAccess.
1st step: "new Driver" does work (only declaration ;-) )
Driver File(s): f:\WorkspaceNetbeans\MSAccessDB\lib\UCanAccess-2.0.4-bin\ucanaccess-2.0.4.jar
Driver Class: net.ucanaccess.jdbc.UcanaccessDriver
Name:msaccess
2nd step: "Connect using..."
JDBC URL: jdbc:ucanaccess://F:/WorkspaceNetbeans/MSAccessDB/data/Datenbank2.accdb
"User Name" and "Password" leave blank
The "Test Connection"-Button results in Error Message:
Cannot establish a connection to
jdbc:ucanaccess://F:\WorkspaceNetbeans\MSAccessDB\data\Datenbank2.accdb using
net.ucanaccess.jdbc.UcanaccessDriver (Could not initialize class
net.ucanaccess.jdbc.UcanaccessDriver)
I've got the newest ucanaccess from http://ucanaccess.sourceforge.net/site.html
ucanaccess-2.0.4.jar, commons-lang-2.6.jar, commons-logging-1.0.4.jar, hsqldb.jar, jackcess-2.0.3.jar in the Netbeans Classpath.
The old fashion way to connect via jdbc to ucanaccess works fine.
public static void main(String[] args) throws ClassNotFoundException, SQLException {
String connectString = "jdbc:ucanaccess://" + "f:/WorkspaceNetbeans/MSAccessDB/data/Datenbank2.accdb";
Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
Connection conn = DriverManager.getConnection(connectString, "", "");
conn.createStatement().execute("CREATE TABLE example1 (id COUNTER PRIMARY KEY,descr text(400), number numeric(12,3), date0 datetime) ");
}
The same connection string also works fine make DBeaver able to connect to the MSAccess db.
My set up:
Windows 7 Professional 64 bit
Microsoft Office 2013
NetBeans IDE 8.0
Java 1.8
The problem is similar to: "Conflict between JT400 and UCanAccess?" Conflict between JT400 and UCanAccess?
but the answers there don't help with my problem.
Any ideas to solve my problem?
UCanAccess 2.0.4.1 has been released, now you can configure UCanAccess as NetBeans service.
As explained in the UCanAccess web site (tab 'jdbc client tools') you have to:
-in the field Driver File(s), add ucanaccess.jar and all dependencies. I've upgraded the commons-logging in the UCanAccess distribution to the 1.1.1, so you can use that jar with NetBeans8.
-use the following pattern for the jdbc url:
jdbc:ucanaccess://;showschema=true
Showschema connection property must be setted to true.
I was wrong, it wasn't a tricky task but...
To establish the connection you have to list in the Driver File(s) :
ucanaccess-2.0.4.jar,
commons-lang-2.6.jar,
hsqldb.jar,
jackcess-2.0.3.jar
AND
a different version of commons-logging that you can find it in NetBeans:
NetBeans 8.0\ide\modules\org-apache-commons-logging.jar (the commons-logging in the UCanAccess distribution is in conflict with that used by NetBeans)
But unfortunatly, after establishing the connection, you won't be able to execute queries through this IDE, because of a trivial bug in the UcanaccessDatabaseMetadata which hasn't effect with the other IDE jdbc clients I tested (Openoffice, Libreoffice, DBeaver, Squirrel, SQLeo and so on) .
So, to do this, you have to wait some days (I think I'll post a patched Ucanaccess 2.0.4.1 next week). Also, I'll add a note about UCanAccess configuration as NetBeans service in the UCanAccess web site.
I am not able to connect the Sql server db from IBM WAS6. It throws below exception, I already added sqljdbc4.jar in classpath.
com.ibm.ws.rsadapter.exceptions.DataStoreAdapterException: DSRA8050W: Unable to find the DataStoreHelper class specified: com.ibm.websphere.rsadapter.MicrosoftSQLServerDataStoreHelper
Not sure is it requires any new JAR file? Can you please help me to solve the issue.
I need to connect to Oracle9,10 and 11 in my java application.The client will always be present where the app will be run and I want the app to just work with username,password and instance (specified in tnsnames.ora).Hence I would like oci drivers with a connection string of type : jdbc:oracle:oci:#testora .Im using the driver: oracle.jdbc.driver.OracleDriver.
I have a 10g client and am using jdk1.5. When I use the ojdbc14 jar from client lib path the app runs.
But if I use the ojdbc5 driver then the app fails with
Exception in thread "main" java.lang.UnsatisfiedLinkError: no ocijdbc11 in java.
library.path
exception.
What im looking for is a way to package a single jar(ojdbc5/ojdbc14) and a single driver which will use oci drivers to connect to the client that is present on local machine(9/10/11).This is the way I would prefer it.
If this is not possible can I search the unix box for oracle version,pick up the correct jar and then use it in classpath when invoking the app which is in jar format?
Thanks,
Fell
java.lang.UnsatisfiedLinkError: no ocijdbc11 in java.library.path
This means that you are missing a DLL (ocijdbc11.dll) in the Java library path. Make sure you have that DLL and start your program like this:
java -Djava.library.path=C:\mydirwiththedll com.mypackage.MyProgram
ojdbc5.jar is intended to work with jdk1.5.x either you are connecting to Oracle 10 or 11g shouldn't matter, ojdbc14.jar was intended for jdk1.4.x