user2669813 user2669813 - 1 year ago 129
MySQL Question

runtime error: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

I am new to mysql and jdbc and I am getting the error in this title. I have been searching all day and cannot find a solution that works for me.

What I have tried:
uninstall/reinstall mysql, copy paste mysql-connector-java-5.1.25-bin.jar and ojdbc7.jar to same location as the .class file I am trying to run, rebuilt the program in a different directory, and probably a couple other things.

I am using notepad++ for coding and the windows command prompt to compile and run. it compiles fine but I try to run with

C:\Projects\bin>java -cp . ClientBase

The output is:

java.lang.ClassnNotFoundException: com.mysql.jdbc.Driver



at Method)


at java.lang.ClassLoader.loadClass(

at sun.misc.Launcher$AppClassLoader.loadClass(

at java.lang.ClassLoader.loadClass(

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(

at ClientBase.main(


// import packages
import java.sql.*;

// create class ClientBase
public class ClientBase{
// JDBC driver name and database URL
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_URL = "jdbc:mysql://localhost/CLIENTBASE";

// Database credentials
static final String USER = "root";
static final String PASS = "";

// Begin method main
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;

// register JDBC driver

// Open connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL, USER, PASS);

// Execute a query
System.out.println("Creating statement...");
stmt = conn.createStatement();
String sql;
sql = "SELECT id, name, address, address 2, city, phone, state, zip, fax FROM CLIENTBASE";
ResultSet rs = stmt.executeQuery(sql);

// Extract data from result set
// Retrieve by column name
int id = rs.getInt("id");
String name = rs.getString("name");
String address = rs.getString("address");
String address2 = rs.getString("address2");
String city = rs.getString("city");
String phone = rs.getString("phone");
String state = rs.getString("state");
String zip = rs.getString("zip");
String fax = rs.getString("fax");

// Display values
System.out.print("ID: " + id);
System.out.print(" Name: " + name);
System.out.println("Address:" + address);
System.out.print("City:" + city);
System.out.print(" State: " + state);
System.out.println(" Zip: " + zip);
System.out.print("Phone: " + phone);
System.out.println(" Fax: " + fax);
} // end while

// clean up
}catch(SQLException se){
// Handle errors for JDBC
}catch(Exception e){
// Handle errors for Class.forName
// finally block used to close resources
}catch(SQLException se){
} // end finally
} // end try
} // End method main
} // end class ClientBase

I should also say that I am going off an online tutorial for this code. It is not exactly how they have it as I decided to make something a little different than theirs, but it is generally the same. I don't think it is a code problem though from what the error is.

Any help would be appreciated! I'm going crazy!

Jk1 Jk1
Answer Source

You need to add a connector library to the Runtime classpath:

java -cp .;mysql-connector-java-5.1.25-bin.jar ClientBase

My example uses Windows classpath separator ";", on other systems it may be different (":" on Linux/Mac). It also assumes, that mysql-connector-java-5.1.25-bin.jar is located on the same folder. If it's not the case, then put a path to the library instead of the plain name.

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