How to read from and write to .properties file from a jsp

[MAGNUM]

Hi all,

I'm a novice to java.

Initially we used to make changes in the properties file manually and restart the tomcat services for changes to take place.
Now, we need to read from and write to values from .properties file through GUI and avoid restart.

I have created a new jsp that displays the fields that are some of the key values of the properties file.(eg. SMTP_Servers_And_Ports).
I have an editable text box after every label in the screen.

My requirement is :
1) The default values( from .properties) for these fields should populate automatically when I open the screen.
2) They should be editable which means if I change the values, they should reflect in the .properties file.
3) These changes should be seen in the properties file without restarting tomcat.


Can someone please help me ?
I would be grateful to you.

Thanks a lot in advance !!



Regards,
Magnum

[serjant]

For exapmle your property file database.properties contains:

jdbc.drivers=org.postgresql.Driver
jdbc.url=jdbc:postgresql:COREJAVA
jdbc.username=dbuser
jdbc.password=secret

Your bean file should have a method wich will contain following:

Properties props=new Properties();

FileInputStream in=new FileInputStream("database.properties");
props.load(in);
in.close();
String drivers=props.getProperty("jdbc.drivers");
id(drivers!=null)
    System.setProperty("jdbc.drivers", drivers);
String url=props.getProperty("jdbc.url");
String username=props.getProperty("jdbc.username");
String password=props.getProperty("jdbc.password");
return DriverManager.getConnection(url,username,password);

Thus you load proeprties from the properties file and make a connection to the db server.

[MAGNUM]

Hi Serjant,

Sorry if I'm being silly.
But I do not have a bean file.
I have a servlet class instead.
So how should I proceed ??

Please help !

[MAGNUM]

Also, we use the Oracle database.
The DBParameters.properties looks something like this :

DataBaseName=XYZ
DBInUse=Oracle
DataBaseDriver=oracle.jdbc.driver.OracleDriver
Poolsize=99
Password=admin
DataAccessClass=dataaccess.oracle.api.OracleDBProx y
BaseURL=jdbc\:oracle\:thin\:@localhost\:1521\:
UserId=abc

[serjant]

Then you insert the lines of code i have previously posted into the get or post method,but without return statement,then with the help of DriverManager you set the connection,and make a redirect to the preferred jsp page

[MAGNUM]

Serjant,

We do not have these entries in the database.
We have to get these entries from a static file.
So could you please tell me how to access this file ( hard-code the file path) and read and write values.

Thanks a ton !!