Cannot get JDBC driver to work in tomcat jsp
Question
I try to make a simple example connection to a mysql database in jsp running on tomcat.
Running the code below I get the response: No suitable driver found for jdbc:mysql://localhost/TestingDB
<HTML>
<HEAD><TITLE>Testing mysql</TITLE></HEAD>
<BODY>
<%@ page import = "java.sql.*"%>
<%
String url = "jdbc:mysql://localhost/TestingDB";
String user = "mysql";
String password = "pwd";
try {
Connection con = DriverManager.getConnection(url, user, password);
out.println("Success");
Statement st = null;
ResultSet rs = null;
st = con.createStatement();
rs = st.executeQuery("SELECT * FROM TestTable");
while(rs.next()){
out.println(rs.getString("String1"));
}
} catch (Exception e) {
out.println(e.getMessage());
e.printStackTrace();
}
%>
</BODY>
</HTML>
I have put the mysql-connector-java-5.1.xx-bin.jar in the CATALINA_HOME/lib directory and when it did not work I tried to put it in the {appname}/WEB-INF/lib directory.
I have restarted tomcat between each try using services tomcat restart .
There should not be any problems accessing the database as it works fine using (pretty much) the same code in a standalone java class.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
class JDBCTest {
private static final String url = "jdbc:mysql://localhost/TestingDB?useSSL=false";
private static final String user = "mysql";
private static final String password = "pwd";
public static void main(String args[]) {
try {
Connection con = DriverManager.getConnection(url, user, password);
System.out.println("Success");
Statement st = null;
ResultSet rs = null;
st = con.createStatement();
rs = st.executeQuery("SELECT * FROM TestTable");
while(rs.next()){
System.out.println(rs.getString("String1"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
I'm really running out of ideas. All help is welcome!
2 answers
solution1
3 ACCPTED 2016-08-18 01:58:56
I have put the mysql-connector-java-5.1.xx-bin.jar in the CATALINA_HOME/lib directory
That should work, but you would have to restart Tomcat before testing it.
and when it did not work I tried to put it in the {appname}/WEB-INF/ directory.
Wrong. Should be the {appname}/WEB-INF/lib directory.
Howver you should be defining this database as a Resource in your META-INF/context.xml and getting it from Tomcat via a JNDI lookup on the java:comp/env/jdbc namespace. What you're doing is poor practice.
solution2
-1 2016-08-18 11:27:25
You forgot to put the port in the URL access.
Here is a simple example for a connection URL:
jdbc:mysql://localhost: 3306 /TestingDB;
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