Database access problems

[tom davies]

Ok this problem has confused me, i will outline what the program does first before i tell you the issue i am having.
I have set up HSQLDB i have created a program which reads from my database.properties file and connects to the database.
I then use this connection to perform some SQL commands such as add, remove and update entries from a simple console menu. If i enter my connection details manually so the url, username, password and driver it connects fine. When doing it manually i have username and password both as "", so the value is null. It all works fine then, my menu works, i can add, delete, update and display my table. If however, i try and connect by directing my program to the details in my database.properties file which also has a blank username and password field i cannot connect, i get this error message.

Exception in thread "main" java.sql.SQLInvalidAuthorizationSpecException: invalid authorization specification - not found: SA

I wanted to see what values were being used to connect so i put a println in to display the username and password when entering my details manually and also from reading from the file.
So when i attempt to establish a connection it shows me this line first. They both display username=null and password= null but if i link to the database.properties file i get the error message mentioned above . . . .It doesn't make sense to me as if a password/username were required, why can i connect by manually setting these to "" in my connection program?

Below is the connection program, you can see in the getConnection method i have the username and password field set to "". To use the values read from the file i use username and password instead.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class SimpleDataSource 
{
    private static String url;
    private static String username;
    private static String password;
    private static String driver;
    
    public static void init(String database)
            throws IOException, ClassNotFoundException
    {
        Properties props = new Properties();
        FileInputStream in = new FileInputStream(database);
        props.load(in);
        
        driver = props.getProperty("jbdc.driver");
        url = props.getProperty("jbdc.url");
        username = props.getProperty("jbdc.username");
        if(username == null) 
        {
            username = "";
        }
        password = props.getProperty("jbdc.password");
        if(password == null) 
        {
            password = "";
        };

        
        
    }
    
    public static Connection getConnection() throws SQLException
    {
        System.out.println("Username:" + username + "Password:" + password);
        return DriverManager.getConnection("jdbc:hsqldb:file:myHSQLDB", "", "");
    }
    
}

[Paul Clapham]

But isn't that just a repost of this thread: https://coderanch.com/t/594246/JDBC/databases/Connecting-database?

It looks to me as if you have ignored almost everything which was said in that thread.

[tom davies]

Paul Clapham wrote:But isn't that just a repost of this thread: https://coderanch.com/t/594246/JDBC/databases/Connecting-database?

It looks to me as if you have ignored almost everything which was said in that thread.

Not really because i can read the file now, that is no longer the problem. The issue is that i can connect to the database by manually entering the details, but if i use the same (blank) details i read from the file it wont let me access the database and gives me the above error message. I have checked that i can read the details correctly from the properties file, the problem is explained in more detail in my first post.

[Paul Clapham]

As I already said in that other thread, you aren't calling the init() method anywhere. You still aren't calling it anywhere.

[tom davies]

Paul Clapham wrote:As I already said in that other thread, you aren't calling the init() method anywhere. You still aren't calling it anywhere.

Turns out i followed your advice for my test program but did not implement it into my actual program!
Apologise, and thanks for the slap round the head.