java lang ClassNotFoundException com mysql jdbc Driver in Eclipse

Question

What is wrong with the code there are lots of error while debugging  I am writing a code for a singleton class to connect with the database mysql   Here is my code  package com glomindz mercuri util  import java sql Connection  import java sql Driver  import java sql DriverManager  import java sql SQLException   public class MySingleTon       String url    jdbc mysql   localhost 3306        String dbName    test       String driver    com mysql jdbc Driver       String userName    root       String password            private static MySingleTon myObj         private Connection Con       private MySingleTon             System out println  Hello            Con  createConnection                SuppressWarnings  rawtypes       public Connection createConnection             Connection connection   null          try                  Load the JDBC driver             Class driver class   Class forName driver               Driver driver    Driver  driver class newInstance                DriverManager registerDriver driver               connection   DriverManager getConnection url   dbName             catch  ClassNotFoundException e                e printStackTrace              catch  SQLException e                e printStackTrace              catch  IllegalAccessException e                e printStackTrace              catch  InstantiationException e                e printStackTrace                      return connection                        Create a static method to get instance              public static MySingleTon getInstance             if  myObj    null                myObj   new MySingleTon                      return myObj             public static void main String a              MySingleTon st   MySingleTon getInstance              I am new to java  Please help

User · Answer

You will have to include driver jar for MySQL MySQL Connector Jar in your classpath.

If you are using Eclipse: How to add dependent libraries in Eclipse

If you are using command line include the path to the driver jar using the -cp parameter of java.

java -cp C:\lib\* Main

User · Answer

I was also facing the same problem   Download mysql-connector-java jar file paste it in the C  Program Files Apache Software Foundation Tomcat 9 0 lib Hope this work for you also

User · Answer

I m developing a simple JavaFX11 application with SQLite Database in Eclipse IDE  To generate report I added Jasper jars  Suddenly it throws  THIS  error   java lang ClassNotFoundException  com mysql jdbc Driver   It was running good  BEFORE THIS ADDITION   But suddenly   I m not using maven or other managers for this simple application  I m adding jars manually   I created  User Library  and added my jars from external folders    PROBLEM OCCURING AREA  My  User Library  are marked as system library  I just removed the marking  Now its not a system library   NOW MY PROJECT WORKING GOOD    DEBUG MYSELF  Tried other things  AT RUN CONFIGURATION  Try  removing library and add jars one-by-one and see  - here you have to delete all jars one by one  there is no select all and remove in eclipse right now in run configuration  So the error messages changes form one jars to another   Hope this helps someone

User · Answer

The exception can also occur because of the class path not being defined   After hours of research and literally going through hundreds of pages  the problem was that the class path of the library was not defined   Set the class path as follows in your windows machine   set classpath path to your jdbc jar file

User · Answer

Trivial as it may seem in my case netbeans version maven project 7 2 1 was different   There is a folder in the project called dependencies   Right click and then it brings up a popup window where you can search for packages   In the query area put   mysql-connector   It will bring up the matches  it seems it does this against some repository    Double click then install

User · Answer

The driver connector is not in your build path  Configure the build path and point it to the  mysql-connector-java-5 1 25-bin jar   check the version which you are using   Alternatively you can use maven  D

User · Answer

Every one has written an answer but I am still surprised that nobody actually answered it by using the best simple way   The people answer that include the jar file  But  the error will still occur   The reason for that is  the jar is not deployed when the project is run  So  what we need to do is  tell the IDE to deploy this jar also   The people here has answered so many times that put that  jar file in the lib folder of WEB-INF  That seems okay  but why do it manually  There is simple way  Check the below steps   Step 1  If you haven t referenced the jar file into the project then  reference it like this  Right click on the project and go to the project properties  Then  go to the java build path  then add external jar file via that   But this will still not solve the problem because adding the external jar via build path only helps in compiling the classes  and the jar will not be deployed when you run the project  For that follow this step  Right click on the project and go to the project properties  Then  go to the Deployment Assembly then press Add   then go to the java build path entries and add your libraries whether it is jstl  mysql or any other jar file  add them to deployment  Below are the two pictures which display it

User · Answer

This needs to be used as of 2020       lt dependency gt           lt groupId gt mysql lt  groupId gt           lt artifactId gt mysql-connector-java lt  artifactId gt           lt version gt 8 0 18 lt  version gt       lt  dependency gt

User · Answer

JDBC API mostly consists of interfaces which work independently of any database  A database specific driver is required for each database which implements the JDBC API   First download the MySQL connector jar from www mysql com  then   Right Click the project --  gt  build path --  gt  configure build path  In the libraries tab press Add External Jar and select your jar

User · Answer

For Maven based projects you need a dependency    lt dependency gt           lt groupId gt mysql lt  groupId gt           lt artifactId gt mysql-connector-java lt  artifactId gt           lt version gt 5 1 38 lt  version gt   lt  dependency gt

User · Answer

For Gradle-based projects you need a dependency on MySQL Java Connector   dependencies       compile  mysql mysql-connector-java 6 0

User · Answer

If you are using tomcat then along with project directory you should also copy the database connector jar file to tomcat lib  this worked for me

User · Answer

check for jar mysql-connector-java-bin  in your classpath download from here

User · Answer

It seems the mysql connectivity library is not included in the project  Solve the problem following one of the proposed solutions    MAVEN PROJECTS SOLUTION   Add the mysql-connector dependency to the pom xml project file    lt dependency gt       lt groupId gt mysql lt  groupId gt       lt artifactId gt mysql-connector-java lt  artifactId gt       lt version gt 5 1 39 lt  version gt   lt  dependency gt    Here you are all the versions  https   mvnrepository com artifact mysql mysql-connector-java   ALL PROJECTS SOLUTION   Add the jar library manually to the project   Right Click the project --   build path --   configure build path  In Libraries Tab press Add External Jar and Select your jar   You can find zip for mysql-connector here   Explanation    When building the project  java throws you an exception because a file  the com mysql jdbc Driver class  from the mysql connectivity library is not found  The solution is adding the library to the project  and java will find the com mysql jdbc Driver

User · Answer

In the project into the folder Libraries-- right click --  Add Library --  Mysqlconnector 5 1

User · Answer

I Understood your problem add this dependency in your pom xml your problem will be solved   https   mvnrepository com artifact mysql mysql-connector-java 5 1 38

User · Answer

If you got the error in your IDE compile-time error   you need to add your mysql-connector jar file to your libs and add this to your referenced library of project too   If you get this error when you are running it  then probably its because you have not included mysql-connector JAR file to your webserver s lib folder   Add mysql-connector-java-5 1 25-bin jar to your classpath and also to your webserver s lib directory  Tomcat lib path is given as an example Tomcat 6 0 lib

User · Answer

For IntelliJ Idea  go to your project structure  File  Project Structure   and add the mysql connector  jar file to your global library  Once there  right click on it and chose  Add to Modules   Hit Apply   OK and you should be good to go

User · Answer

It is because the WEB-INF folder does not exist at the location in the sub directory in the error  You either compile the application to use the WEB-INF folder under public html OR copy the WEB-INF folder in sub folder as in the error above

[java] java.lang.ClassNotFoundException: com.mysql.jdbc.Driver in Eclipse

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