Re: Right version of jdbc

[Raivo Rebane <raivore55@xxxxxxxxx>]

Thanks,

there was really JDK 17 in use.

I changed it to Java 1.8

PS C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin> java -version
java version "1.8.0_381"
Java(TM) SE Runtime Environment (build 1.8.0_381-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.381-b09, mixed mode)

but the same error occured :

java.sql.SQLException: No suitable driver found for jdbc:postgresql://localhost:5432/mushroom_database
        at java.sql.DriverManager.getConnection(DriverManager.java:689)
        at java.sql.DriverManager.getConnection(DriverManager.java:247)
        at MushroomAPIs.AddMushrooms.doGet(AddMushrooms.java:30)

 why  java.sql gives that error ?

Raivo

On Fri, Sep 29, 2023 at 4:03 PM Raivo Rebane <raivore55@xxxxxxxxx> wrote:

I removed this recommended jar.

I am using Eclipse and there Java 1.8 is setted.

What I have to do ?

Raivo

On Fri, Sep 29, 2023 at 2:05 PM Dave Cramer <davecramer@postgres.rocks> wrote:

Dave Cramer

www.postgres.rocks

On Fri, 29 Sept 2023 at 06:19, Raivo Rebane <raivore55@xxxxxxxxx> wrote:

Hi,

The code is :

package MushroomAPIs;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;

@WebServlet("/AddMushrooms")
public class AddMushrooms extends HttpServlet implements java.io.Serializable {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

final String DB_URL = "jdbc:postgresql://localhost:5432/mushroom_database";
final String USER = "mushroomer";
final String PASSWORD = "";

Connection connection = null;
Timestamp LastModifiedTS = Timestamp.valueOf("1970-01-01 00:00:00");

try {
connection = DriverManager.getConnection(DB_URL, USER, PASSWORD);

// SQL päring vanima timestamp-i leidmiseks
String query = "SELECT timestamp AS oldest_timestamp FROM mushrooms";
PreparedStatement statement = connection.prepareStatement(query);
ResultSet resultSet = statement.executeQuery();

while (resultSet.next()) {
Timestamp oldest_timestamp = resultSet.getTimestamp("oldest_timestamp");
if (oldest_timestamp.after(LastModifiedTS))
LastModifiedTS = oldest_timestamp;
}
System.out.println("Vanim timestamp: " + LastModifiedTS);

} catch (SQLException e) {
e.printStackTrace();
}

int count = ProcAddMushrooms.GetAddMushrooms(connection, LastModifiedTS);

response.getWriter().println("Added " + count + " mushrooms");
}

}

and available from github - https://github.com/raaivore/APIexperiment

May be somebody can help me to solve the problem ?

Raivo

On Fri, Sep 29, 2023 at 6:44 AM Ron <ronljohnsonjr@xxxxxxxxx> wrote:

On 9/28/23 01:18, Raivo Rebane wrote:

[snip]

I made a new Java application Eclipse Dynamic WEB application and want to use Postgres - PostgreSQL 10.14

[snip]

What's wrong. Or is better to use more newer postgres. And then which jdbc-I need to use ?

https://www.postgresql.org/support/versioning/

Pg 10 will be EOL in 6 weeks.  Thus, "yes, use a newer version of Postgresql" (unless, like me, you're constrained by circumstances like "the business won't let us upgrade").

Pg 15 and the latest JDBC are in the repositories: https://www.postgresql.org/download/ 

--
Born in Arizona, moved to Babylonia.

I loaded your project in IDEA and it was referring to jdk1.7 

It also looks like you still have the postgis-geometry-2.5.0.jar in the webapp/lib dir remove it

Dave