This question already has answers here:
How to install JDBC driver in Eclipse web project without facing java.lang.ClassNotFoundexception
(13 answers)
Closed 7 years ago.
I am using Java/Eclipse to connect to MySQL database but encountering the following error.
Error Message:
Unable to connect to databasejava.lang.ClassNotFoundException: com.mysql.jdbc.Driver
Code:
<%
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection myCon = DriverManager.getConnection("jdbc:mysql://localhost/myDB", "root", "password");
if(! myCon.isClosed())
out.println("Successfully connected to " + "MySQL server!");
myCon.close();
}catch(Exception ex){
out.println("Unable to connect to database" + ex);
}
%>
I know that this question has already been asked here but still I am unable to sort this thing out.
Environmental variables:
JAVA_HOME: C:\Program Files\Java\jdk1.7.0_51
CLASSPATH: .%JAVA_HOME%\lib;C:\Program Files\MySQL\Connector J 5.1.29;
How can I can solve this issue?
The Eclipse project doesn't know where you have the drivers for the database. You need to include them under the WEB-INF/lib directory so that they become part of the classpath.
Inside tomcat the external definitions do not apply.
Either deploy the driver jar with your application or add it to the extension library inside Tomcat. I would use the first if Tomcat is not expected to help you with e.g. connection pools or similar
if you are using eclipse then add MySQL jars in projects lib folder.
Yes it worked for me also for the error as
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver.
Copied the sql connector jar file to lib folder of web-inf .
After copying this, the value from html to mysql database is sucessfully inserted
Thanks for the Help
Related
This question already has answers here:
Connect Java to a MySQL database
(14 answers)
Closed 6 years ago.
I am a newbie to J2EE.I have checked similar questions but nothing helped.
I am creating a simple login application but i am facing the above error.
I have mysqlconnector in build path and a lib folder as shown in the image :SQL connector
The source code of the application is as follows:
LoginDao.java
This file connects the application to mysql database.
String userName = "root";
String password = "mysql";
I have provided the username and password of mysql here.Is this correct?
For this I have created a database in mysql:
create database form;
use form;
create table login(username varchar(20),pass varchar(20));
show tables;
insert into login values("nehal",12345);
Now the project runs properly but when i enter username as nehal and password:12345, it gives the above error:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
1 way =>Paste the mysqlconnector.jar file in jre/lib/ext folder.
2 way => set classpath
open comman prompt and write:- C:>set classpath=c:\folder\mysql-connector-java-5.0.8-bin.jar;.;
in IDE :
Right Click the
project -- > build path -- > configure build path
In Libraries Tab press Add External Jar and Select your jar.
Don't know eclipse that much but i would guess that your library is mussing at runtime. As i see you use apache tomcat and it seems that it doesn't has that mysql jar.
You have to add that jar to your apache tomcat. See Where do I have to place the JDBC driver for Tomcat's connection pool?
This question already has an answer here:
Class [org.apache.derby.jdbc.ClientDriver] not found. When trying to connect to db
(1 answer)
Closed 7 years ago.
![JAVADB_DRIVER_LABEL library missing][1]
I am trying to connect to a JavaDB through netbeans 8 IDE on Windows 7. i can connect it using the DB manager provided with netbeans in Services panel. But when trying to connect it through my code I get ClassNotFoundException for the org.apache.derby.jdbc.ClientDriver class.
I could not run the Apache tomcat server on my machine, so I am Using the Glassfish server 4 that comes with netbeans.
my code to connect to the DB is as follows:
String url = "jdbc:derby://localhost:1527/sample;UID=app;PWD=app";
Class.forName("org.apache.derby.jdbc.ClientDriver");
conn = DriverManager.getConnection(url);
This similar code worked with SQL server, MS Access.
Please add your jdbc driver to the classpath of your project. It should work.
Currently, the class loader is unable to load your driver class as it does it does not find it in the classpath
Download the version of Apache Derby you need from here. Extract the zip and you should get derbyclient.jar which has the class org.apache.derby.jdbc.ClientDriver.
FYI : If your application runs on JDK 1.6 or higher, then you do not need to explicitly load the EmbeddedDriver. In that environment, the driver loads automatically.
You need to add derbyclient.jar to your classpath. You can find this jar in the download package of derby from here. This jar contains your org.apache.derby.jdbc.ClientDriver.
For more information, see this answer : where is org.apache.derby.jdbc.ClientDriver?
This question already has answers here:
No suitable driver found for 'jdbc:mysql://localhost:3306/mysql [duplicate]
(8 answers)
Closed 8 years ago.
I'm trying to connect my Java program to a database, but for some reason I'm getting an exception telling me there's No suitable driver found.
This is the code I use to connect:
Class.forName("com.mysql.jdbc.Driver");
java.sql.Connection connect = DriverManager.getConnection("jdbc:mysql//localhost:3307/miku");
PreparedStatement statement = connect.prepareStatement("SELECT * FROM users");
ResultSet result = statement.executeQuery();
Does anyone see what the problem is?
You need to add MySQL connector driver jar. Download it from here and add it to your classpath.
PS : If you are using Java 7 you don't even have to write Class.forName("com.mysql.jdbc.Driver");. it will automatically be loaded from the classpath. So just add your driver jar file to the classpath.
Just add mysql connector jar. If you using Netbeans right click on the Libraries folder on project and then add library. There is library called MySql JDBC Driver and add it.
My application running well in tomcat 6 with this connection variable
Class.forName("com.mysql.jdbc.Driver");
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/Travel","root","root");
I have already tried many places to solve this but I couldn't find solution. But in tomcat 7 when I try to use connection variable it return Null pointer Exception.
Is there any way to change it in connection file?
Hads similar issue Tomcat7 with mysql-connector-java-5.1.26 that put in both my $CATALINA_HOME/lib and WEB-INF/lib, just in case. But it wouldn't find it until use either one of these two statements before getting the connection:
DriverManager.registerDriver(new com.mysql.jdbc.Driver ());
OR
Class.forName("com.mysql.jdbc.Driver");
then followup with removing mysql-connector-java-5.1.26 from $CATALINA_HOME/lib and the connection still works.
This question already has answers here:
The infamous java.sql.SQLException: No suitable driver found
(21 answers)
Closed 3 years ago.
I am working on a web application where I am creating MSSQLSERVER 2008
database dynamically.
But it's giving me
java.sql.SQLException: No suitable driver found for jdbc:sqlserver://localhost:1433;databaseName=master
My code is:
String dbName = "db1";
try {
String url = "jdbc:sqlserver://localhost:1433;databaseName=master";
Connection connection = DriverManager.getConnection(
url,
"sa",
"roshan14121987");
Statement statement = connection.createStatement();
String sqlquery = "CREATE Database \"" + dbName + "\"; ";
statement.executeUpdate(sqlquery);
statement.close();
connection.close();
} catch(Exception e) {
e.printStackTrace();
}
I have added sqljdbc4.jar in lib. I have tried it on both NetBeans (with GlassFish and Tomcat Server) and Eclipse IDE(Tomcat Server).
On the other hand I have tried this with simple desktop application, it's working fine on both IDEs. With sqljdbc4.jar added in lib.
Before calling DriverManager.getConnection() you will have to load the SQLServer JDBC driver. You can do Class.forName("xxxx"); where xxxx is the appropriate driver class (fully qualified name with package prefix).
EDIT: Do this Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); to load the driver. Refer MSDN link for more.
Is sqljdbc4.jar in your war file under WEB-INF/lib. This is the alternate location to $CATALINA_HOME/lib and recommended to keep your web application self-contained. Further, if you should ever need to change servers, you need only drop the war into your webapps directory.
You might also need a Class.forName([database class]).newInstance, but that isn't necessary using a JDBC 4.0 driver. Good luck and if you have further problems, do leave a comment.
The error happen in the runtime on Tomcat Server,right? I think you need to make sure your sqljdbc4.jar deploy the in the Server.