This seems to be a common problem, but I could not find a working solution. I've looked through dozens of thread and have been working with my teacher. I am trying to connect to MYSQL using JDBC. I'm also using a tomcat server and running xubuntu 12.04. I am getting ClassNotFound exception.
I've tried the JDBC mysql-connector-java.jar driver placed in both /tomact/lib and /usr/share/java and have manually built paths in each instance. I've also tried adding paths through deploy assembly. I've tried using EXPORT CLASSPATH. Nothing has worked. I cannot get this exception to stop being thrown. Does anyone have other solutions I can try?
my code:
public static Connection getConnection() {
if(connection!=null){
return connection;
}else{
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
String dbURL = "jdbc:mysql://144.91.20.136:3306/jewelryInventoryGallison";
String username = "javaee";
String password = "mills2012";
connection = DriverManager.getConnection(dbURL, username, password);
return connection;
} catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
}
test class:
public static void main(String[] args) throws Exception{
Connection conn = DatabaseUtils.getConnection();
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM Inventory");
while(rs.next()) {
System.out.println(rs.getString("name"));
}
}
and trace:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$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:186)
at utils.DatabaseUtils.getConnection(DatabaseUtils.java:19)
at utils.DatabaseUtils.main(DatabaseUtils.java:34)
Exception in thread "main" java.lang.NullPointerException at utils.DatabaseUtils.main(DatabaseUtils.java:35)
your help will be greatly appreciated!
