I'm trying to make a program in intelJ that connects to a SQL database, but I receive this error when it tries to find the drivers.
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
I've checked that the directory I use is correct when using Class.forname
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
and it points to the correct location within the Jar file for the driver. I'd assume that that java is unable to find the class for whatever reason, as I've done the exact same thing with a second project which works fine. Any ideas?
You need to add the driver JAR to the classpath of the project.
If you're using a simple Java project: right click on the project in IntelliJ IDEA > Open Module Settings. Then, Project Settings > Libraries. Click on +. Select Java. Browse to the driver JAR. Click OK and it should work.
You need to add it to the module's dependencies. The Libraries section just lists the libraries of this project.
This question already has answers here:
Connect Java to a MySQL database
(14 answers)
Closed 4 years ago.
This question might have asked here number of times . After doing some google search for the above error and doing some update, I can't understand why I'm still getting that error. I've already put my driver-- mysql-connector-java-5.1.5-bin in the classpath:
Java_Home\jre\lib\
Java_Home\jre\lib\ext\
Java_Home\lib
and the code which I'm using to connect to mysql database is:
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/mail","root","");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select message_body from deadletter");
String dbtime;
while (rs.next()) {
dbtime = rs.getString(1);
System.out.println(dbtime);
}
con.close();
}
catch (SQLException e) {
System.out.println("Connection Failed! Check output console");
e.printStackTrace();
}
}
and the complete stacktrace of the above exception is:
java.lang.ClassNotFoundException: com.mysql.jdbc:Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at mail.main(mail.java:114)
Now, what's wrong I'm doing here?
If you're facing this problem with Eclipse, I've been following many different solutions but the one that worked for me is this:
Right click your project folder and open up Properties.
From the right panel, select Java Build Path then go to Libraries tab.
Select Add External JARs to import the mysql driver.
From the right panel, select Deployment Assembly.
Select Add..., then select Java Build Path Entries and click Next.
You should see the sql driver on the list. Select it and click first.
And that's it! Try to run it again! Cheers!
I too struggled with the same problem and finally got the solution for it.
Just copy the MySql-Connector.jar into Tomcat's lib folder, and then remove the jar from the webapp's lib folder, and then, run the project.
The most common cause is that you have some conflict in where your classes are loaded from. For example if you have 2 locations and one has JDBC drivers and the other one not then if your classloader loads from the 1st location and some class from the 1st location wants to use the driver - the driver is not there. So look for the duplicate JARs that are using your driver
I have the same problem
but I found this after a long search:
http://www.herongyang.com/JDBC/MySQL-JDBC-Driver-Load-Class.html
But I made some change. I put the driver in the same folder as my ConTest.java file,
and compile it, resulting in ConTest.class.
So in this folder have
ConTest.class
mysql-connector-java-5.1.14-bin.jar
and I write this
java -cp .;mysql-connector-java-5.1.14-bin.jar ConTest
This way if you not use any IDE just cmd in windows or shell in linux.
this ans is for eclipse user......
first u check the jdbc jar file is add in Ear libraries....
if yes...then
check...in web Content->web Inf folder->lib
and past here jdbc jar file in lib folder.....
1) Download connector from here https://www.mysql.com/products/connector/
2) Select JDBC driver for mysql
3) click on Platform Independent (Architecture Independent), ZIP Archive
4) Download the file and unzip it
5) (For Eclipse)Click Project->properties-> Java Build Path->Libraries
(For Netbeans) right click libraries on left bar-> add jar
6) Click on add external jar
7) select mysql-connector-java-5.1.40-bin.jar
8) Done!
If you are using NetBeans follow the following steps:
Right click on 'Libraries' and select 'Add Library..'
Scroll down the list of 'Global Libraries' and select 'MySQL JDBC Driver' and click on 'Add Library'.
What did you put exactly in lib, jre/lib or jre/lib/ext? Was it the jar mysql-connector-java-5.1.5-bin.jar or something else (like a directory)?
By the way, I wouldn't put it in lib, jre/lib or jre/lib/ext, there are other ways to add a jar to the classpath. You can do that by adding it explicitly the CLASSPATH environment variable. Or you can use the -cp option of java. But this is another story.
In NetBeans,
right click on libraries, select properties
select rub tab
there you need to add the mysql-connector-java.jar and apply
You should download MariaDB connector.
Then:
Expand your project.
Right-click on Libraries.
Select Add Jar/Folder.
Add mariadb-java-client-2.0.2.jar which you just downloaded.
Ok, i find solution changing the path of mysql-conector-java.jar to the follow path:
ProjectName/WebContent/Web-inf/lib/mysql-conector-java.jar
So you need to add the conector to project again and delete the previous one.
Most of the possible solution has been covered above. From my experience of this issue, i have placed the mysql-connector-jar in the /WEB-INF/lib folder of the webapp module and it worked fine for me.
In netbean
Right click on your project, then you click on Libraries, then Run tab, add library, then select mysql connector
In IntelliJ
Do as they say in eclipse
"If you're facing this problem with Eclipse, I've been following many different solutions but the one that worked for me is this:
Right click your project folder and open up Properties.
From the right panel, select Java Build Path then go to Libraries tab.
Select Add External JARs to import the mysql driver.
From the right panel, select Deployment Assembly.
Select Add..., then select Java Build Path Entries and click Next.
You should see the sql driver on the list. Select it and click first.
And that's it! Try to run it again! Cheers!"
Here we have to add the jar file in Project Structure -> Libraries -> +(add)
I keep the mysql-connector jar with my project rather than in Javahome. As a result, you can be sure it can be found by being sure its in the local classpath. A big upside is that you you can more the project to another machine and not have to worry about (or forget) to set this up again. I personally like including it in version control.
Ok..May be i can also contribute my solution..
Right click on project -properties -->Deployment assembly...there you need to add the mysql-connector-java.jar and apply it...which makes your prject configured with web-Libraries that has this sql connector...This worked for me..
I hope this works for you guys as well
The only thing that worked for me was downloading the mysql-connector-java-5.0.8-bin.jar directly from the MySQL website:
http://dev.mysql.com/downloads/connector/j/3.1.html
Then if you're using Eclipse paste this mysql-connector-java-5.0.8-bin.jar in the WEB-INF lib folder
If doesn't works try with any of the solutions posted in this link:
http://javarevisited.blogspot.com/2012/03/jdbc-javalangclassnotfoundexception.html
I experienced the same error after upgrading my java to 1.8.0_101. Try this:
i. Remove the mysql.jar fro your buildpath.
ii. Clean the server and project
iii. Add the jar file back to the build path.
Worked for me.
Just copy the MySQL JDBC drive jar file and paste it to Tomcat or whatever is the server's lib folder. It works for me.
just copy and paste the mysqlconnector jar to your project folder and then build path it will definitely work.
see to it that the argument of Class. forName method is exactly "com. mysql. jdbc. Driver".
If yes then see to it that mysql connector is present in lib folder of the project. if yes then see to it that the same mysql connector . jar file is in the ClassPath variable (system variable)..
I am trying to use the Digraph.class file contained in algs4.jar but am getting the "cannot be resolved to a type" error as shown below. I have added algs4.jar to the buildpath by right clicking > Build Path > Add to Build Path. I have tried restarting eclipse and using Project > Clean...
Any ideas what I'm doing wrong?
Since you did not specify your application type and IDE.. I will tell you for web project in eclipse.
Go to Project>>Right CLick>>Click Properties>>Click On Deployment Assemply>>Click Add.
Here add your required jar file and click apply.
Hope this works!
In Eclipse right click on the project and expand Build Path-->Configure Build path. Select Libraries-->Click on Add External Libraries and select the lib that you want to import.
Hope this works.
I am using Parse.com and I upgraded the parse SDK from 1.2.4 to 1.3.0. I have deleted the 1.2.4 files from the libs folder and pasted the 1.3.0 files to libs folder. When I am trying to run my app now it is crashing with no error. After debugging I found out that when I try to open any declaration of Parse class files it shows me this:
Here is the build path screenshot:
I have tried to clean the project, closed and opened eclipse.
I am stucked! Any help would be appreciated
Please verify the BuildPath as well.
Right Click on the Project -> BuildPath -> Configure Build Path
Check to see there is .jar files or not. If there are no .jar files, Upload using "Add Jars" button from your libs directory. Once Build Path is configured, clean and run the Project. Hope this will help you.
From your figure you posted, it just that your editor cannot find source for your jar file. But in your figure i do see javadoc. In the same page you will see a button called "Attach source". You can click that button to locate manually your javadoc. With this you should be able to go to source code.
I found the solution, but it was not related to the libs file or to the build path. The problem was in the manifast, had to remove android:noHistory="true" from my activity tag and the every thing worked fine.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
com.mysql.jdbc.Driver not found with mysql connector in buildpath
I'm working on connecting MySQL database to a Java program. When I run my program I am getting this error
Class Not Found Exception: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
for this line
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
So, what's the problem? I'm placing the connector in the project's file.. Is the correct or should it be in another location?
OS Windows XP, Eclipse 4.0, mysql connector 5.1.22
JAR file need to add to project class path.
First Right click on you Eclipse Project, Project --> Build Path --> Configure Build Path. Under Libraries tab, click Add Jars or "Add External JARs".
You don't even need that line of code, any time in the last five years or so. Just delete it,
The jar file should be in your classpath. If you have created the project through an IDE, make sure you add the jar in your build path.
You have to include the connector jar file in your project's build path. In eclipse project properties dialog, go to "Java Build Path" and add the jar file in "Libraries" tab
the jar should be included in your classpath. In your IDE, configure your build path and add the required jar in your libraries section.