I am having issues trying to get a database connection using the code below:
import java.lang.*;
import java.sql.*;
public class Demo {
public static void main(String[] args){
try{
Connection conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test?" + "user=test&password=123456");
}catch(SQLException ex){
System.out.println("SQLException: " + ex.getMessage());
System.out.println("SQLState: " + ex.getSQLState());
System.out.println("VendorError: " + ex.getErrorCode());
}catch(Exception ex){
System.out.println("Exception: " + ex.getMessage());
}
}
}
The error message that is outputted is:
SQLException: No suitable driver found for jdbc:mysql://127.0.0.1:3306/test?user=test&password=123456
SQLState: 08001
VendorError: 0
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at Demo.main(Demo.java:9)
My java version is below:
java -> /usr/lib/jvm/java-6-openjdk-i386/bin/java
javac -> /usr/lib/jvm/java-6-openjdk-i386/bin/javac
javac.1.gz -> /usr/lib/jvm/java-6-openjdk-i386/man/man1/javac.1.gz
javadoc -> /usr/lib/jvm/java-6-openjdk-i386/bin/javadoc
javadoc.1.gz -> /usr/lib/jvm/java-6-openjdk-i386/man/man1/javadoc.1.gz
javah -> /usr/lib/jvm/java-6-openjdk-i386/bin/javah
javah.1.gz -> /usr/lib/jvm/java-6-openjdk-i386/man/man1/javah.1.gz
javap -> /usr/lib/jvm/java-6-openjdk-i386/bin/javap
javap.1.gz -> /usr/lib/jvm/java-6-openjdk-i386/man/man1/javap.1.gz
javaws -> /usr/lib/jvm/java-6-openjdk-i386/jre/bin/javaws
javaws.1.gz -> /usr/lib/jvm/java-6-openjdk-i386/jre/man/man1/javaws.1.gz
I've, literally, no idea how to troubleshoot this error message. The database exists. The username and password exists. I've currently not added any tables to the database but I don't think that can be the issue, since I'm only making a connection after all...
Driver is installed under /usr/share/java
-rw-r--r-- 1 root root 822524 10月 20 2011 mysql-connector-java-5.1.16.jar
-rw-r--r-- 1 root root 827942 9月 9 22:40 mysql-connector-java-5.1.21-bin.jar
lrwxrwxrwx 1 root root 35 9月 9 22:40 mysql-connector-java.jar -> mysql-connector-java-5.1.21-bin.jar
lrwxrwxrwx 1 root root 24 10月 20 2011 mysql.jar -> mysql-connector-java.jar
Does anybody know how to fix it..
Thanks for your help!
:)
Make sure you have mysql connector driver (i.e. jar file) in your project library. This error message appears when there is no appropriate driver.
You can download the MySQL connector driver from this site.
I was having the same problem and the curiouss answer helped me to figure out an new solution.
Note: I was using Maven.
So I decided to try this dependency: http://mvnrepository.com/artifact/mysql/mysql-connector-java
After I added into the pom.xml and run mvn compile exec:javait worked.
Related
package com.soul.db;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import java.sql.Connection;
public class JdbcSSHConnection {
/**
* Java Program to connect to remote database through SSH using port forwarding
* #throws SQLException
*/
public static void main(String[] args) throws SQLException {
int lport=443;
String rhost="10.99.69.10";
String host="10.105.27.201";
int rport=3306;
String user="root";
String password="SysPassword1";
String dbuserName = "root";
String dbpassword = "DBPassword1";
String url = "jdbc:mysql://localhost:"+lport+"/proj_db";//"jdbc:mysql://localhost:3306", "root", "mysql"
String driverName="com.mysql.jdbc.Driver";
Connection conn = null;
Session session= null;
try{
//Set StrictHostKeyChecking property to no to avoid UnknownHostKey issue
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
JSch jsch = new JSch();
session=jsch.getSession(user, host, 22);
session.setPassword(password);
session.setConfig(config);
session.connect();
System.out.println("Connected");
int assinged_port=session.setPortForwardingL(lport,rhost, rport);
System.out.println("localhost:"+assinged_port+" -> "+rhost+":"+rport);
System.out.println("Port Forwarded");
//mysql database connectivity
Class.forName(driverName).newInstance();
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection (url, "root", "DBPassword1");
// step3 create the statement object
Statement stmt = conn.createStatement();
System.out.println ("Database connection established");
// step4 execute query
ResultSet rs = stmt.executeQuery("select DISTINCT STUD_NAME from STUD_DETAILS;");
while (rs.next())
System.out.println(rs.getString(1));
// step5 close the connection object
conn.close();
//System.out.println ("Database connection established");
// System.out.println("DONE");
}catch(Exception e){
e.printStackTrace();
}finally{
if(conn != null && !conn.isClosed()){
System.out.println("Closing Database Connection");
conn.close();
}
if(session !=null && session.isConnected()){
System.out.println("Closing SSH Connection");
session.disconnect();
}
}
}
}
I installed SSH secure shell client on my windows machine.I am trying to connect mysql server installed in linux machine.
Now i am getting below Error:
Connected
localhost:443 -> 10.99.69.10:3306
Port Forwarded
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
MESSAGE: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
STACKTRACE:
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1997)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:573)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1044)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)
at com.mysql.jdbc.Connection.(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.soul.db.JdbcSSHConnection.main(JdbcSSHConnection.java:54)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
STACKTRACE:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
MESSAGE: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
STACKTRACE:
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1997)
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:573)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1044)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)
at com.mysql.jdbc.Connection.(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.soul.db.JdbcSSHConnection.main(JdbcSSHConnection.java:54)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:641)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1044)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)
at com.mysql.jdbc.Connection.(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.soul.db.JdbcSSHConnection.main(JdbcSSHConnection.java:54)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2847)
Closing SSH Connection
at com.mysql.jdbc.Connection.(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.soul.db.JdbcSSHConnection.main(JdbcSSHConnection.java:54)
These errors were resolved for me once I started using the hostname instead of the IP address for the SSH tunnel. I am also connecting to MySQL on Linux via SSH tunnel (with DataGrip IDE).
I am using MySQL Workbench (5.6.19). It has several connections among which the table that i want to access is in "Connection1"(name of connection). Connection Host: 122.0.0.0 . My database name is "sorder". user = "root", password = "password",port = 3306.
Here's my piece of code:
try
{
Class.forName("com.mysql.jdbc.Driver");
}
catch (ClassNotFoundException e)
{
PrintWriter pw = new PrintWriter(System.out, true);
pw.println("Driver Connection Failed.");
e.printStackTrace();
}
System.out.println("MySQL JDBC Driver Registered!");
Connection connection = null;
try
{
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sorder","root", "password");
} catch (SQLException e)
{
System.out.println("Connection Failed! Check output console");
e.printStackTrace();
return;
}
My driver connection failed. Plus i am not sure what my path Strin url should be since there are more than 1 connections in mySQL workbench.
error :
-------- MySQL JDBC Connection Testing ------------
Driver Connection Failed.
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:126)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.apache.jsp.NewFile_jsp._jspService(NewFile_jsp.java:65)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
I followed whatever suggestions i got in different forums, like:
reassured that JAR file is there in build path.
reassured that JAR file is there in Window>Prefernces>Java>Build Path>Classpath variable
JAR file explicitily in WEB-INF/lib buildpath.
Thankful for any suggestions.
Regards.
when we manually created a xml file and added welcome-file-list, it worked. Default xml file was missing.
This is my first post and I hoping I can reach out to the group.
I'm pulling my hair out with this problem.
I'm running a EC2 Ubuntu micro instance with LAMP.
I'm using Java with JDBC to access the mysql database.
The issue is that the Java code keeps throwing a "ClassNotFound" Exception when I execute:
Class.forName("com.mysql.jdbc.Driver");
I have installed the following:
sudo apt-get install mysql-server
sudo apt-get install mysql-client
sudo apt-get install libmysql-java
My imports in the Java file are:
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
import java.util.regex.*;
import java.sql.*;
import java.util.Properties;
import java.net.*;
import java.sql.Connection;
import java.sql.DriverManager;
My $CLASSPATH shows:
.:/usr/share/java/mysql.jar:/usr/share/java/mysql-connector-java.jar:/usr/share/java/mysql.jar:/usr/share/java/mysql-connector-java.jar:/usr/share/java/mysql-5.1.10.jar:/usr/share/java/mysql-connector-java-5.1.10.jar
In /usr/share/java I have:
drwxr-xr-x 3 root root 4096 2012-05-25 02:01 .
drwxr-xr-x 316 root root 12288 2012-05-24 21:21 ..
-rwxrwxrwx 1 root root 448964 2009-11-23 22:38 gnome-java-bridge.jar
-rwxrwxrwx 1 root root 2621 2010-03-05 04:16 libintl.jar
lrwxrwxrwx 1 root root 31 2012-05-25 02:01 mysql-5.1.10.jar -> mysql-connector-java-5.1.10.jar
-rwxrwxrwx 1 root root 754057 2010-01-26 08:02 mysql-connector-java-5.1.10.jar
lrwxrwxrwx 1 root root 31 2012-05-25 02:01 mysql-connector-java.jar -> mysql-connector-java-5.1.10.jar
lrwxrwxrwx 1 root root 16 2012-05-25 02:01 mysql.jar -> mysql-5.1.10.jar
This is the code that always throws up the exception message to an output file:
try {
try {
Class.forName("com.mysql.jdbc.Driver");
outyyy.write("Class loaded \n");
}
catch (ClassNotFoundException e) {
outyyy.write("Class not found! \n");
outyyy.write(e.getMessage() + " \n");
}
this._connection = DriverManager.getConnection(url, this._user, this._pass);
this._isConnected = true;
}
catch (Exception e) {
this._isConnected = false;
}
I'm not sure if it's relevant but I can access and query the database just fine using PHP.
Any assistance is much appreciated.
Thanks, Andy
Set classpath
export CLASSPATH=$CLASSPATH:/usr/share/java/mysql-connector-java.jar
Source: http://marksman.wordpress.com/2009/03/01/setting-up-mysqljdbc-driver-on-ubuntu/
This question already has answers here:
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.
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.
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.
Did you register your class with the Driver? For example:
Class.forName("net.sourceforge.jtds.jdbc.Driver");
DriverManager.getConnection(url,user,password);
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.
Go to library folder of your project and right click it,then go to 'Add Library' option.Now add the mysql.jdbc.Driver
So I want to create a JDBC connection to MySQL server that is installed on my pc, here are the steps,
I installed MySQL with the username and password "root", downloaded mysql-connector-java and from theere I coped the JAR "mysql-connector-java-5.1.12-bin" to "C:\Sun\SDK\jdk\jre\lib\ext", I then added it as an external JAR in my project in eclipse, now in my class I have this code:
public void initialiseDatabase()
{
try {
// Load the Driver class.
Class.forName("com.mysql.jdbc.Driver");
//Create the connection using the static getConnection method
databaseConnection = DriverManager.getConnection (databaseUrl+databaseName,
dbUserName, dbPassword);
sqlStatement = databaseConnection.createStatement();
}
catch (SQLException e) {e.printStackTrace();}
catch (Exception e) {e.printStackTrace();}
}
(this is going to be psuedocode cause I am reading from a properties file and don't want the one helping me reading through long lines of code from main to figure out all the variables),
where databaseUrl = "127.0.0.1"
dbUserName = "root"
dbPassword = "root"
databaseName = "MySQL" //this one I am not sure of, do I need to create it or is it set inherenrly?
now the MySQL server is up and running, but when I call the method initialiseDatabase the following exception is thrown:
"java.sql.SQLException: No suitable driver found for rootroot
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Proxy$JDBCConnection.initialiseDatabase(Proxy.java:721)"
when line 721 is:
sqlStatement = databaseConnection.createStatement();
Where have I gone wrong?
thanks
Your database url should look like this:
jdbc:mysql://host:port/database
Example, if you use localhost, the default port and a database named cachedb, your url would be:
jdbc:mysql://localhost/cachedb