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 java.net.URLClassloader$1.run(URLClassLoader.java:336)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:432)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:188)
at ClientBase.main(ClientBase.java:21)
Goodbye.
// 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;
try{
// register JDBC driver
Class.forName("com.mysql.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
while(rs.next()){
// 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.println(address2);
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
rs.close();
stmt.close();
conn.close();
}catch(SQLException se){
// Handle errors for JDBC
se.printStackTrace();
}catch(Exception e){
// Handle errors for Class.forName
e.printStackTrace();
}finally{
// finally block used to close resources
try{
if(stmt!=null)
stmt.close();
}catch(SQLException se){
se.printStackTrace();
} // end finally
} // end try
System.out.println("Goodbye.");
} // 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!
// finally block used to close resources- really ? so why you are closing them in try ? Also try to format your code !!! – Boxhaul