SQLException: No suitable driver found [duplicate] - mysql

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The infamous java.sql.SQLException: No suitable driver found
(21 answers)
Closed 7 years ago.
I have a Java class that accesses a MySQL database through JDBC that I use in a JSP running on Tomcat, and I am getting No Driver Found Exception.
I have a method:
private static Statement makeStatement() {
try{
com.mysql.jdbc.Driver d = null;
try{d = new com.mysql.jdbc.Driver();}catch(Exception e){
System.out.println("ERROR BY NEW DRIVER " + e.toString() +
"\n");e.printStackTrace();}
Connection con = DriverManager.getConnection(url, user, password);
return con.createStatement();
}catch(java.sql.SQLException ex){
System.out.println("ERROR IN makeStatement " + "\nERROR - " +
ex.toString() + "\n ERROR CODE:\n " + ex.getErrorCode() +
"\nSQLSTATE:\n " + ex.getSQLStat e());ex.printStackTrace();}
return null;
}
That throws an error at Connection con = DriverManager.getConnection(url, user, password); Here is my printout from catalina.out:
Received Parameters
ERROR IN makeStatement
ERROR - java.sql.SQLException: No suitable driver found for
ERROR CODE:
0
SQLSTATE:
08001
java.sql.SQLException: No suitable driver found for
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at message.Message.makeStatement(Message.java:72)
at message.Message.query(Message.java:79)
at message.Message.getName(Message.java:225)
at org.apache.jsp.message_jsp._jspService(message_jsp.java:288)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:548)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
ERROR IN QUERY java.lang.NullPointerException
ERROR in getName java.lang.NullPointerException
-----------------------------------
Received Parameters
newMessage =
newpassword =
verifypassword =
sendinfo =
username = Eli
newusername =
login = login
password = tree
ERROR IN makeStatement
ERROR - java.sql.SQLException: No suitable driver found for
ERROR CODE:
0
SQLSTATE:
08001
java.sql.SQLException: No suitable driver found for
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at message.Message.makeStatement(Message.java:72)
at message.Message.query(Message.java:79)
at message.Message.validUser(Message.java:195)
at org.apache.jsp.message_jsp._jspService(message_jsp.java:123)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:548)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
ERROR IN QUERY java.lang.NullPointerException
ERROR in validUser java.lang.NullPointerException
ERROR IN makeStatement
ERROR - java.sql.SQLException: No suitable driver found for
ERROR CODE:
0
SQLSTATE:
08001
java.sql.SQLException: No suitable driver found for
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at message.Message.makeStatement(Message.java:72)
at message.Message.query(Message.java:79)
at message.Message.getName(Message.java:225)
at org.apache.jsp.message_jsp._jspService(message_jsp.java:288)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:548)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
ERROR IN QUERY java.lang.NullPointerException
ERROR in getName java.lang.NullPointerException
The only error that matters is the one in makeStatement() as that failing causes all the other errors. I have quadruple checked that I have the correct jar files in my WEB-INF/lib directory and I have restarted Tomcat more times than I would ever want to. I have a separate webapp that uses makeStatement() in a different .java file, and that webapp runs fine. Even weirder is that I have this in the .java:
static {
System.err.println("\n\nTEST MYSQL ACCESS: dump all relevant tables:");
dump();
System.err.println("END OF MYSQL ACCESS ACCESS.");
}
public static void dump() {
try {
readUsers();
for (UserRecord u: users)
System.err.println(u.username+" "+u.password);
} catch (Exception e) {System.err.println(e);}
}
where readUsers() reads all the users from the database using makeStatement(). This actually works and all the users in the database are printed (not shown here for obvious reasons :) ) and then the driver not found error occurs.

Answer 1

java.sql.SQLException: No suitable driver found
This exception can have 2 causes:
The JDBC driver is not loaded at all.
URL does not match any of the loaded JDBC drivers.
Since the driver seems to be loaded (although in an incorrect manner), it look like that the URL is plain wrong. Ensure that the value of your url variable matches the following format
jdbc:mysql://localhost:3306/dbname
See also:
Connect Java to a MySQL database
Unrelated to the concrete problem: Java code doesn't belong in a JSP file. Work on that as well. Your exception handling is also terrible, you should throw the exception (so that it blocks executing the remnant of the code) instead of printing the message/trace and then continue with the code.

Answer 2

I had to remove mysql-connector-java-*.jar from WEB-INF/lib and add it into tomcat6/lib folder. (tomcat6 is where tomcat was installed.) I do not know why this worked but it worked for me.

Answer 3

Did you register your class with the Driver? For example:
Class.forName("net.sourceforge.jtds.jdbc.Driver");
DriverManager.getConnection(url,user,password);

Answer 4

Are you passing an emtpy url string to getConnection()? The error message starts out
No suitable driver found for ERROR
No suitable driver found for [blank]? Seems like you're not passing a url here.

Answer 5

Go to library folder of your project and right click it,then go to 'Add Library' option.Now add the mysql.jdbc.Driver