Error reading java properties file

Question

I do not know if it is correct and if it works, but I realized a division in the project. a project would access the DAO and have the connection and a properties file with the connection information. Another has a main class in which I haven’t created frames yet, just a main class for testing. In libraries I added the projects as reference and I did the test but is giving an error where can not read the properties file, could tell me what can be?

Description of the Error:

jul 27, 2016 9:30:41 AM Conection.GenericConnection getDbProperties
GRAVE: null
java.io.FileNotFoundException: src\properties\conf.properties (O sistema não pode encontrar o caminho especificado)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(FileInputStream.java:195)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:93)
    at Conection.GenericConnection.getDbProperties(GenericConnection.java:25)
    at Conection.OracleConnection.getConnection(OracleConnection.java:35)
    at Views.mainTeste.main(mainTeste.java:16)

Exception in thread "main" java.lang.NullPointerException
    at Conection.OracleConnection.getConnection(OracleConnection.java:35)
    at Views.mainTeste.main(mainTeste.java:16)
D:\SICF_Project\SICFCadastros\nbproject\build-impl.xml:1063: The following error occurred while executing this line:
D:\SICF_Project\SICFCadastros\nbproject\build-impl.xml:804: Java returned: 1
FALHA NA CONSTRUÇÃO (tempo total: 0 segundos)

Class Mother Genericconnection

package Conection;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.Statement;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Ulisses Gimenes
 */
public abstract class GenericConnection {

    protected Properties dbProperties;
    protected Connection conn;
    protected Statement st;

    public Properties getDbProperties() {
        if (dbProperties == null) {
            try {
                dbProperties.load(new FileInputStream("src/properties/conf.properties"));
            } catch (FileNotFoundException ex) {
                Logger.getLogger(GenericConnection.class.getName()).log(Level.SEVERE, null, ex);
            } catch (IOException ex) {
                Logger.getLogger(GenericConnection.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return dbProperties;
    }

    public void setDbProperties(Properties dbProperties) {
        this.dbProperties = dbProperties;
    }

    public Connection getConn() {
        return conn;
    }

    public void setConn(Connection conn) {
        this.conn = conn;
    }

    public Statement getSt() {
        return st;
    }

    public void setSt(Statement st) {
        this.st = st;
    }

    public abstract Connection getConnection();
}

Connection class for oracle

package Conection;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author UlissesGimenes
 */
public class OracleConnection extends GenericConnection {  

    private static OracleConnection connOra;

    public static OracleConnection getConnOra() {
        if(connOra == null){
            connOra = new OracleConnection();
        }
        return connOra;
    }

    public static void setConnOra(OracleConnection connOra) {
        OracleConnection.connOra = connOra;
    }    

    @Override
    public Connection getConnection() {
        if (getConn() != null) {
            return getConn();
        } else {
            try {
                String url = "jdbc:oracle:thin:@" + 
                        super.getDbProperties().getProperty("ServerOracle") + 
                        ":" + super.getDbProperties().getProperty("portOracle") + 
                        ":" + super.getDbProperties().getProperty("sidOracle");
                setConn(DriverManager.getConnection(
                        url, 
                        super.getDbProperties().getProperty("userOracle"), 
                        super.getDbProperties().getProperty("passwdOracle")));
                setSt(getConn().createStatement());
                System.out.println("conectado");
                return getConn();
            } catch (SQLException ex) {
                Logger.getLogger(OracleConnection.class.getName()).log(Level.SEVERE, null, ex);
                return null;
            }
        }
    }

}

Main class of testing

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Views;

import Conection.OracleConnection;

/**
 *
 * @author UlissesGimenes
 */
public class mainTeste {
    public static void main(String[] args) {
        OracleConnection.getConnOra().getConnection();
    }
}

Image of the tree of the project

Answer 1

Your problem is in detecting the path correct file . properties in the project. The point is that the way you are accessing the file, it should be in the working directory, which can be accessed this way:

System.getProperty("user.dir")

Now, if you don’t want to leave the file. properties in the working directory and prefer that it goes packaged in the project, then you should access it via getClass(). getResource() or getClass(). getResourceAsStream().

Answer 2

Apparently you are indicated the wrong way to the file. I don’t know if I got your project tree right because I don’t work with this IDE but try changing this path:

src/properties/conf.properties

By this path:

properties/conf.properties

It is always better to keep this type of configuration file in the root path of the project, so it is easier to find. Just take the main project and create a folder inside it properties and put the file inside.