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How to fix java.sql.SQLException. No suitable driver for jdbc [duplicate]

This question already has answers here:
Getting the following error - No suitable driver found for jdbc:postgresql://localhost: 5432/testDBMS
(4 answers)
Closed 3 years ago.
I'm getting an error java.sql.SQLException No suitable driver for jdbc:derby:books when I try to run a file from command line. In Eclipse, everything works fine. I read a book "Java, How To Program" Deitel&Deitel and the file is an example from it. When I try to compile program from command line it shows no error, but the problem is with running. Please help
public class DisplayAuthors {
public static void main(String args[]) {
final String DATABASE_URL = "jdbc:derby:books";
final String SELECT_QUERY =
"SELECT authorID, firstName, lastName FROM authors";
String user="deitel";
String password="deitel";
try (
Connection connection = DriverManager.getConnection(
DATABASE_URL, user,password);
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(SELECT_QUERY)) {
ResultSetMetaData metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
System.out.printf("Table Authors database books:%n%n");
for (int i = 1; i <= numberOfColumns; i++) {
System.out.printf("%-8s\t", metaData.getColumnName(i));
}
System.out.println();
while (resultSet.next()) {
for (int i = 1; i <= numberOfColumns; i++) {
System.out.printf("%-8s\t", resultSet.getObject(i));
}
System.out.println();
}
}
catch (SQLException sqlException) {
sqlException.printStackTrace();
}
}
}
Command line execution:
javac DisplayAuthors.java
java DisplayAuthors

You are running in the command line your class file without the dependencies.
In your eclipse IDE you maybe have a derby.jar or similar dependencies and eclipse adds all automatically to the execution. Is required to add all the dependencies when you are executing directly from the command line.
If you are note creating a runnable jar with dependencies in MANIFEST.MF and you are trying to execute the class directly is required to add the -cp parameter with the path to all the dependencies:
Example:
java -cp Derby.jar;. DisplayAuthors
Summing that the Derby.jar and your class are in the same place and there is no more dependencies to add.
More information about:
Java Command line (Oracle Java9 SE)
Differences between "java -cp" and "java -jar"?

java.sql.SQLException. No suitable driver for jdbc
The above error jumps when JDBC DriverManager can't find any suitable driver for the given connection URL. Either the JDBC driver isn't loaded at all before connecting the DB, or the connection URL is wrong.
The URL should be like this,
jdbc:derby://localhost:1527/dbname;create=true;
or
jdbc:derby:books;create=true;
Use create=true if you want the database to be created if it doesn't exist.
And finally, check that Derby JAR file is on the classpath. If you can't find it, then you can download the JAR from here and add to the project Library folder.
For Apache Derby, the driver class name is org.apache.derby.jdbc.ClientDriver. So put that as follows,
Class.forName("org.apache.derby.jdbc.ClientDriver");
Connection connection = DriverManager.getConnection(DATABASE_URL, user, password);
Make sure your URL, username and the password is correct, and try to run your code.

IntelliJ - Problem connecting to PostgreSQL

I am new to PostgreSQL (I normally use other database engines), and I also do not use Java often.
My Problem is that I get the following exception:
java.sql.SQLException: No suitable driver found for DATABASE_NAME
java.sql/java.sql.DriverManager.getConnection(DriverManager.java:702)
at
java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228)
I followed this tutorial: http://www.postgresqltutorial.com/postgresql-jdbc/connecting-to-postgresql-database/ and added postgresql-42.2.5.jar as a library.
The problem is that adding the driver as a library, as can be seen in the screenshot, has no effect.
So my question is: how do I connect to a PostgreSQL database using Java and the latest IntelliJ?
Any help would be appreciated.
UPDATE 1:
UPDATE 2:
Since the code has been requested: I have replaced the original code by a minimal code that will cause the error:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class IngestData
{
protected static String url;
protected static final String user = "user";
protected static final String password = "password";
public static void main(String[] args)
{
Connection connection = null;
url = args[args.length-1];
try
{
connection = DriverManager.getConnection(url, user, password);
System.out.println("SUCCESS");
} catch (SQLException e)
{
System.out.println("ERROR");
e.printStackTrace();
}
}
}
The console output is:
ERROR
java.sql.SQLException: No suitable driver found for http://127.0.0.1:10282/db01617792
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:702)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228)
at IngestData.main(IngestData.java:17)
Process finished with exit code 0
Here is the link to the git repository containing the code:
https://github.com/ka6555/StackOverflow-Postgresql-Problem.git
UPDATE 3:
I found the error:
I need to change
protected static String url;
to
protected static String url = "jdbc:postgresql://";
and
url = args[args.length-1];
to
url += args[args.length-1];
While this solves my original problem, the program is now stuck executing the following line:
connection = DriverManager.getConnection(url, user, password);
There is no error but the program will simply run like with an endless loop never going beyond this code line.
UPDATE 4:
I have fixed all problems now.

It seems like you are missing the postgres jar file in your project dependencies.
Open the Project Structure (Ctrl+Alt+Shift+S on Windows)
Select modules / dependencies tab
You should see something like the following:
If the postgres dependency is missing:
Klick on the + sign on the right side of the screenshot
Choose Library/Project Library and your postgres jar file
Your code should now run. Let me know if it helps.
Note: Please provide your minmal working code on GitHub for a quicker response.

The main problem was that I used a command line parameter as the database url without prefixing it with jdbc:postgresql://. Additionally, I had to reinstall postgresql because of some odd behavior I could not figure out the reason for.

This is the message you get when the URL syntax is incorrect.
This is the requirement.

JDBC cannot be resolved to a variable in Eclipse

Currently trying to use a sqlite-dbc4-3.8.2-SNAPSHOT.jar that was given to me as part of an assignment. I've tried running my main file and I get the errors below:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
org.sqlite.JDBC cannot be resolved to a variable
at DbBasic.open(DbBasic.java:54)
at DbBasic.<init>(DbBasic.java:67)
at DbUser.<init>(DbUser.java:40)
at Main.go(Main.java:12)
at Main.main(Main.java:65)
Here's part of the DbBasic class that attempts to connect and open a database using JDBC:
private Connection getConnection()
// get the connection
{
Connection con = null;
try {
con = DriverManager.getConnection(SQLITE_DATABASE_LOCATION+dbName);
con.setAutoCommit(false);
}
catch (SQLException sqle)
{
notify("Db.getConnection database location ["+SQLITE_DATABASE_LOCATION+"] db name["+dbName+"]", sqle);
};
return con;
} // end of method "getConnection"
private void open()
// "open" the database : actually really setting up the connection and obtaining the metadata about the server
// makes sure that database file is present before trying to establish connection
// otherwise SQLite will create a new, empty database with the name provided
{
File dbf = new File(dbName);
if (dbf.exists() == false)
{
System.out.println("SQLite database file ["+dbName+"] does not exist");
System.exit(0);
};
try {
Class.forName(org.sqlite.JDBC);
con = getConnection();
} catch ( ClassNotFoundException cnfe ) {
notify("Db.Open",cnfe);
};
if (debug) System.out.println("Db.Open : leaving");
} // end of constructor "Open"
I have already tried adding external JAR's and the .jar file is then added to my 'Referenced Libraries' in Eclipse.
I'm having trouble understanding the Class.forName(org.sqlite.JDBC) and how to make it work with my .jar file

Though the post is relatively old and the OP might not be interested in a solution for this issue now anymore, thought of putting this as an answer. It might help someone who runs into such silly issues. This is one of the common mistakes that people do while using Eclipse as an IDE, try to run code that doesn't even compile.
You can check the "Problems" view in Eclipse and fix the compilation errors and then try to compile your program. The obvious error here on this question is the missing double quotes "" while using the driver name.
Class.forName("org.sqlite.JDBC");

Microsoft Access 2007 connectivity in java 8 [duplicate]

This question already has an answer here:
Manipulating an Access database from Java without ODBC
(1 answer)
Closed 8 years ago.
I want to connect my database to msaccess 2007 using java, but I hear that the jdbc bridge is removed from java 8.
Please guide me that where is the problem in the following code.
import java.sql.*;
public class UserLogin
{
public static void main(String[] args)
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// C:\\databaseFileName.accdb" - location of your database
String url = "JDBC:ODBC:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=" +
"C:\\Users\\Shakir\\Documents\\NetBeansProjects\\UserLogin\\me.accdb";
// specify url, username, pasword - make sure these are valid
Connection conn = DriverManager.getConnection(url);
System.out.println("Connection Succesfull");
}
catch (Exception e)
{
System.err.println("Got an exception! ");
System.err.println(e.getMessage());
}
}
}

I hear that the jdbc bridge is removed from java 8.
Please guide me that where is the problem in the following code
The problem is precisely that the JDBC-ODBC Bridge has been removed from Java 8, so your code is trying to use a feature that is simply not available. Consider this approach instead:
Manipulating an Access database from Java without ODBC

ODBC Data Source in your Control Panel Settings and add new database with source.

Unable to add odbc5.jar in classpath

I want to connect to the oracle DB using Play Framework 1.2.5. FOr this I have modified the application.conf file as follows:
db.url=jdbc:oracle:thin:#localhost:1521/orcl
db.driver=oracle.jdbc.OracleDriver
db.user=system
db.pass=tiger
Then I tried to add the driver i.e. classes12.jar/odbc5.jar but everytime when i try to run it, I am getting the exception:
Cannot connect to the database, Driver not found
For adding the jar file in Eclipse IDE, below are the steps I tried:
1) Added it in the lib folder (present under the root directory of my new application) and then added it to the java build path
2) Added it in the framework/lib folder (inside the downloaded framework folder) and then added it to the java build path
In both the cases, I am getting the above mentioned exception.
Also, Please list down the steps for connection to an oracle db, I am not able to find it anywhere in the documentation
EDIT
I am able to add the jar in the classpath, everything was fine except that I did not restarted the server once it failed to connect the jar.
I did this code for fetching some data from the database:
Connection conn = DB.getConnection();
PreparedStatement stmt = null;
System.out.println(conn);
try {
stmt = conn.prepareStatement("select dept_id from emp where emp_id = 11");
ResultSet rs = stmt.executeQuery();
while (rs.next()) {
System.out.println("Dept Id: " + rs.getInt("dept_id"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
This approach is working but I am having a confusion:
If I comment the entire block of code and run the application then I can see the message in the console stating the connection is made to the DB. Hence :
1) Is the above block of code the right approach to fetch the data from Oracle DB or something better than this is present?
2) Is it like for the entire application lifetime, the connection with tht DB will persist?
I am a newbie in this, hence struggling :(
Please let me know hoe to proceed with this.
Regards

Oracle db driver class name is oracle.jdbc.driver.OracleDriver