connect to database use properties file in java web application

Question

I write a code to connect to database from servlet.I want to use properties.but it does not work.i think i my code or properties file has problem.please help me to correct it.

try
        {
            Properties prop=new Properties();
            FileInputStream in = new FileInputStream(System.getProperty("WEB-INF/dbConnection.properties"));
            prop.load(in);
            in.close();

            String drivers = prop.getProperty("jdbc.drivers");
            String connectionURL = prop.getProperty("jdbc.url");
            String username = prop.getProperty("jdbc.username");
            String password = prop.getProperty("jdbc.password");
            Class.forName(drivers);
            con=DriverManager.getConnection(connectionURL,username,password);
            System.out.println("Connection Successful");

..

and this is my properties file

jdbc.driverClassName=oracle.jdbc.driver.OracleDriver
jdbc.url=jdbc:oracle:thin:@192.168.101.84:1521:orcl
jdbc.username=user1
jdbc.password=123

Load the properties file using `getResourceAsStream()` . Check [this](http://stackoverflow.com/questions/4814506/properties-file-in-web-app). — AllTooSir, Jul 23 '13 at 07:51
use this InputStream inputStream = this.getClass().getClassLoader() .getResourceAsStream("dbConnection.properties"); — Veera, Jul 23 '13 at 07:54

Mark M · Answer 1 · 2013-07-23T08:44:29.707

1

Instead of

FileInputStream in = new FileInputStream(System.getProperty("WEB-INF/dbConnection.properties"));

use

InputStream in = getClass().getResourceAsStream("dbConnection.properties");

edited Jul 23 '13 at 08:44

answered Jul 23 '13 at 07:54

Mark M

1,580
10
22

in both of instruction 'in' will be null ! – John Jul 23 '13 at 08:21
i create a dbConnection.properties in WEB-INF and put my info. there.so when i debug my project when it Achieve to this command it puts nothing in "in" and give me exception – John Jul 23 '13 at 08:28
Try removing `WEB-INF/` and see what happens. Or try to find the actual path, I can't see your system so I can't help on that part. – Mark M Jul 23 '13 at 08:45
1

`getClass().getClassLoader().getResourceAsStream("dbConnection.properties")` should work – nickRise Apr 24 '17 at 15:50

score 1 · Answer 2 · edited Nov 17 '18 at 10:04

try  {
    FileReader reader = new FileReader("Full Path");
    Properties prop = new Properties();
    prop.load(reader);

    String drivers = prop.getProperty("jdbc.driverClassName");
    String connectionURL = prop.getProperty("jdbc.url");
    String username = prop.getProperty("jdbc.username");
    String password = prop.getProperty("jdbc.password");
    Class.forName(drivers);
    Connection con = DriverManager.getConnection(connectionURL, username, password);
    System.out.println("Connection Successful");
} catch (SQLException sqle) {
    // TODO: Add catch code
    sqle.printStackTrace();
} catch (FileNotFoundException fnfe) {
    // TODO: Add catch code
    fnfe.printStackTrace();
} catch (IOException ioe) {
    // TODO: Add catch code
    ioe.printStackTrace();
} catch (ClassNotFoundException cnfe) {
    // TODO: Add catch code
    cnfe.printStackTrace();
}catch (Exception e) {
    // TODO: Add catch code
    e.printStackTrace();
}

score 0 · Answer 3 · answered Jul 23 '13 at 08:54

This part:

(System.getProperty("WEB-INF/dbConnection.properties"));

is actually referring to your classpath, try removing WEB-INF/ or just leave /, for checking root folder.

Or you can specify the fully qualified name, i.e : "C:\\foo\\test\\...\\dbConnection.properties" or "/app/blah/.../dbConnectionProperties"

score 0 · Answer 4 · answered Aug 29 '14 at 10:49

0

For Class name, in the properties file you have defined the driver as 'jdbc.driverClassName'

but when passing variable you just pass as 'jdbc.drivers'

answered Aug 29 '14 at 10:49

KingFeming

1,053
10
21

connect to database use properties file in java web application

4 Answers4