This question already has answers here:
The infamous java.sql.SQLException: No suitable driver found
(21 answers)
Closed 7 years ago.
When trying to connect to mysql I always get this error:
java.sql.SQLException: No suitable driver found for localhost test
I already included the mysql-connector.jar in the /WEB-INF/lib in my app. What else do I need to configure to make it work? Do I need to add something in web.xml? I'm not using the appengine.
Here is my code in the server:
package com.mysql.server;
import java.sql.Connection;
import java.sql.DriverManager;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.mysql.client.ConnDb;
public class ConnDbImpl extends RemoteServiceServlet implements ConnDb {
public Connection con;
#Override
public String tryConn() {
try{
String host = "localhost";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "pwd";
Class.forName(driver).newInstance();
con = DriverManager.getConnection(host+db, user, pass);
return "Connected to Database";
} catch(Exception ex) {
return ex.toString();
}
}
}
You will get this exception when the JDBC URL is not accepted by any of the loaded JDBC drivers as per the Driver#acceptsURL() method. You actually forgot the JDBC driver specific URI prefix. For the MySQL JDBC driver this is jdbc:mysql://. The full connection URL should look like this:
con = DriverManager.getConnection("jdbc:mysql://localhost/test", user, pass);
See also:
Connector/J documentation - Obtaining a connection
I found another cause for this error message. In my case the user simply had no privilege to the database e.g. to the selected table. Dear driver developers, why do you use such misleading error messages? A lot of people have real trouble with this.
For me, it was forgetting to include the MySQLJDBC Driver in the project libraries. DOH!
This was giving that error:
Connection connection= DriverManager.getConnection("jdbc:mysql://localhost:3306/lib_db","root","root");
but when I changed that to:
Connection connection =DriverManager.getConnection("jdbc:mysql://localhost/db_name?"+"user=root&password=root");
error was gone
Related
Iam tryig to connect to a Postgres Database. Iam really new to that and have read a post in the forum. But I didn't manage it.
public void connect() {
//Connection con = null;
try {
Class.forName("org.postgresql.Driver");
Properties props = new Properties();
props.setProperty("user", user);
props.setProperty("password", password);
props.setProperty("ssl","true");
Connection conn = DriverManager.getConnection(url, props);
//String url = "jdbc:postgresql://localhost/test?user=fred&password=secret&ssl=true";
//Connection conn = DriverManager.getConnection(url);
System.out.println("Erfolgreich verbunden!");
}
catch (Exception e){
e.printStackTrace();
System.err.println(e.getClass().getName()+": "+e.getMessage());
System.exit(0);
}
}
EDIT:
I updated my Code.
The database is deployed to heroku.
It throws the error:
java.sql.SQLException: No suitable driver found for jdbc:postgres://vuqmbekwlgohkw:******
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:702)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:189)
at com.company.Database.connect(Database.java:20) p
at com.company.Main.start(Main.java:16)
at com.company.Main.main(Main.java:25)
java.sql.SQLException: No suitable driver found for jdbc:postgres://vuqmbekwlgohkw:***************
I believe that your problem is that your connection URL is malformed.
When DriverManager.getConnection throws SQLException, the message includes the exact url value passed to the function. In your case, that looks like jdbc:postgres://vuqmbekwlgohkw:******.
But obviously that is not the URL you are using. You have replaced part of the URL with asterisks. That suggests that you think the format of the URL is:
jdbc:postgres://username:password#host:port/dbname
which seems to be what Heroku provides in the DATABASE_URL environment variable. You are using asterisks to prevent us from seeing the password.
However, it looks like the PostgreSQL JDBC driver does not accept URLs in this format. When I tried, I also got the "No suitable driver" error. According to the documentation, the format of the URL is:
jdbc:postgres://host:port/database
Some parts are optional, but the driver does not appear to support putting the user name or password in the URL.
I was able to connect to an AWS PostgreSQL instance by using the URL format described in the documentation and using the connection properties to set the user name and password.
You said you are new so I'm gonna start with the painfully obvious, do you have the driver on your classpath?
it's a jar you add to your project that you can download from https://jdbc.postgresql.org/
Otherwise I have an example of the url that worked for me, except I was not exactly using jdbc, it was a spring-boot project:
jdbc:postgresql://ec2-174-99-88-88.compute-1.amazonaws.com:5432/asdfasdfsadf?sslmode=require
There is no port number in your commented URL and not all parameters might be supported, like Willis pointed out.
I am trying to connect my sql server database to my code in java.
To get started I want to just make sure I can connect to the database via DSN but I am getting the error:
java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
Here is my code:
package javaapplication1;
import java.sql.*;
public class JavaApplication1 {
public static void main(String[] args)
{
Connection con;
Statement stmt;
ResultSet rs;
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:SQLACCESS");
System.out.print("CONNECTION SUCCESSFUL");
}catch(Exception e)
{
System.err.println(e);
}
}
}
The DSN named "SQLACCESS" does not require a username or password. How should I go about connecting the two?
Everything starting with sun. is specific to Sun JDK. So it will not work on other instances.
The method you describe doesn't work in Java 8. They have removed the class. There is an article on how to workaround it (but I will look if there is something better): https://community.yellowfinbi.com/knowledge-base/article/moving-the-jdbc-odbc-bridge-from-java-7-to-java-8
You can find information on how to connect to MS Access databse here: http://www.javaxt.com/Tutorials/JDBC/How_to_Open_a_JDBC_Connection_to_Microsoft_Access
I know this has been asked a hundred times and I think I have read all the posts and tried every variation of the solutions. I'm using NetBeans and new to it. I'm sure I'm just missing some small step because it seems like its just not seeing the driver that I added to the library. This is the first time I have tried to connect to a database so please be gentle.
try
{
String host = "jdbc:sqlserver://Server:1433;Database";
String uName = "User";
String uPass = "Password";
Connection con = DriverManager.getConnection(host,uName,uPass);
System.out.println("Your are connected to SQLServer 2014");
}
catch (SQLException err)
{
System.out.println(err.getMessage());
}
You forgot to register the jdbc driver class.
Call
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
before calling Connection con = DriverManager.getConnection(host,uName,uPass);.
It will resolve the issue.
UPDATE
In documentation for new jdbc drivers it is declared that this step is not necessary. But in practical work, I have found that this step is required even for new drivers, otherwise you will get "No suitable driver found" error. This error occurs sometimes, for example it does not occur when you are making and running a console jar-application, but occurs when you have created and deployed a web-application.
So, I advise to register the jdbc driver class before getting the database connection via DriverManager.getConnection() call.
This question already has answers here:
Connect Java to a MySQL database
(14 answers)
Closed 7 years ago.
So I was testing out MySQL databases for the first time, (For the following code, all I want to do is establish a connection to the data base):
import java.sql.*;
public class Driver {
public static void main(String[] args) {
Connection con = null;
try{
String url = "jdbc:mysql://localhost:3306/movie";
String user = "root";
String pw = "RockoAndLuke739969";
con = DriverManager.getConnection(url, user, pw);
}
catch(SQLException e){
e.printStackTrace();
}
}
}
And here is the Exception:
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/movie
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Driver.main(Driver.java:13)
And I don't know why it isn't working.... thanks for taking your time to read :)
(I am new to stackoverflow by the way, so sorry if I screwed something up xD)
You need to add the driver in your classpath.
If you are using maven you have to add the following dependency
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.36</version>
</dependency>
If you aren't using maven check your classpath manually and add the driver to it.
In addition add
Class.forName("com.mysql.jdbc.Driver").newInstance();
as first line of your connection code. This line is needed to load the class driver and is used by DriverManager to know wich driver must be used.
Here the reference documentation link
i just keep getting Connection Failed, i dont know why, im running a server on UniServerZ and trying to get the SQL file from localhost.
Im using uniserverZ (Unicontroller.exe) and i made the .sqlite file using SQLite manager addon for firefox. Anyone can help me out here? Thanks!
Edit: Ok, now im just trying to load the sqlite file from my C drive, i have commented out the command that would load it from my localhost because it doesnt work either. Any help?
package ui;
import java.sql.*;
import javax.swing.*;
public class MySQLConnect {
Connection conn=null;
public static Connection ConnectDb(){
try{
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:C:\\UniServerZ\\home\\Database\\db");
// Connection conn = DriverManager.getConnection("jdbc:mysql:\\localhost:3306\\Database\\db\\student.sql","root","root");
JOptionPane.showMessageDialog(null, "Connection Successful!");
return conn;
} catch(Exception e){
JOptionPane.showMessageDialog(null, "Connection Failed");
return null;
}
}
}
This connection is strange
jdbc:mysql://localhost:3306//Database//student.sql
try
"jdbc:mysql://localhost:3306/Database",userName,password
where Database is the real data base name.
Note also single / vs //
You work with Sqlite database but used the jar of Mysql..
So correct this line.
String driver = "com.mysql.jdbc.Driver";
to
String driver = "org.sqlite.JDBC";
Change url and add the sqlite jdbc driver to succesfull connection with Sqlite DB.
And remove one / from below line after . jdbc:sqlite: need only / .
Connection conn = DriverManager.getConnection("jdbc:sqlite://localhost/Database/db/database.sqlite");
Thanks..