Using variables in a java.properties file

Hi,
I have a .properties file that I'm using to configure an app. I was wondering if there is a way to set a property = to an already defined property and more. So for example:
app.siteroot=c:\tomcat\webapps\myapp
app.templatefolder= app.siteroot + \templates
I know the above won't work but is something like this possible?
Thanks
krebsnet

I don't think there's anything in the core APIs that let you do anything like that. You can probably find something 3rd party though.
I know ant lets you do that:dir1=foo
dir2=${dir1}/bar It's possible that the code that does that is available in a library from jakarta. Or you could check sourceforge, or mindproducts (or is it just mindprod?)

Similar Messages

How to load Java properties file dynamically using weblogic server

Hi,
We are using Java properties file in Java code. Properties in java properties file are frequently modified. If I keep these properties file in project classpath or as part of war, I will have to redeploy application after each change.
We are using Weblogic Server.
Can you please suggest me how can this properties file be loaded at weblogic server startup. Then in that case, how to refer property file in Java code?
What is the best practice for this?
Thanks,
Parshant

Another alternative is, keep the property file in any pre-defined location. Write a class which reads the properties from the file and returns the one which is requested by caller and deploy this class. Whenever you have to change the properties just update the property file on server and next call to fetch the property should return the updated one.
Downside of this approach is file I/O everytime. To overcome that you can actually "cache" the properties in a hashmap. Basically when any property if requested, first check the hashmap, if not found then only read from property file and also update in hash map. Next time same property will be returned from hash map itself. The hash map will be cleared at every server restart since its in the memory. You will also need to build a method to clear the hashmap when you update the values in the property file on server.
This solution would be suitable for small size files and when network overhead of calling a DB needs to be avoided.

Static lookup lists:read data from a Java *.properties file

Hi
i need to make static lookup lists i am using read data from a Java *.properties file
i am using the Class "PropertyFileBasedLookupViewObjectImpl" that wrote by Steve Muench in ToyStore.
but i need to use the default language for that i update the loadDataFromPropertiesFile()
method to find the correct properties file
String temp=Locale.getDefault().getLanguage();
String propertyFile =
getViewDef().getFullName().replace('.', '/')+"_"+temp+ ".properties";
the problem:
For English(TEST_en.properties) it is good and working
For Arabic(TEST_ar.properties) read from correct file _ar.properties
but the dispaly character is wrong
When Debug
In the File 1=دمشق
In debug 1=/u32423

Depending on your use case you can either use a programmatic VO or directly expose the JV class as a data control.
http://docs.oracle.com/cd/E18941_01/tutorials/jdtut_11r2_36/jdtut_11r2_36.html

How to configure Java Properties File location in WLW

How do we tell Workshop 7.0 where to look for Java properties files (loaded by
PropertyResouceBundle in code) ?
Thanks,
Ray

Ray,
The build number indicates that you have not upgraded to Service Pack 2 of
version 7.0. I will strongly recommend you to do so. That will shield you
from the issues which were fixed in the 2 service packs.
Regards,
Anurag
"Ray Yan" <[email protected]> wrote in message
news:[email protected]...
>
Raj,
We are using WebLogic Workshop Build 7.0.1.0.0829.0 on Windows 2000.
We shut down the WebLogic Server on Solaris 2.6, log off, log back on,startWebLogic
in production nodebug mode, and re-run jwsCompile on the same source code.The
error does not occur anymore. Everything seems to be fine now.
Thanks,
Ray
"Raj Alagumalai" <[email protected]> wrote:
Hello Ray,
Can you let me know if you are using the GA version of WebLogic Workshop
or
if you have the latest Service Pack.
Thank You,
Raj Alagumalai
WebLogic Workshop Support
"Ray Yan" <[email protected]> wrote in message
news:[email protected]...
Anurag:
Thanks for your response!
By moving the property files to WEB-INF/classes from WEB-INF, we arealmost there.
But we have a follow up problem. We use a static initializer to loadthe
log4j
property file like this:
static {
try {
ClassLoader cl= (new Log()).getClass().getClassLoader();
InputStream is = cl.getResourceAsStream(logfile);
Properties props = new Properties();
props.load(is);
PropertyConfigurator.configure(props);
} catch (Exception e) {
e.printStackTrace();
When we run jwsCompile, we keep getting this:
Compiling: com/****/TestWS.jws
weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[weblogic.management.Admin
may only be used on the Server ]
at weblogic.management.Admin.getInstance(Admin.java:104)
at
weblogic.security.internal.ServerPrincipalValidatorImpl.getSecret(ServerPrin
cipalValidatorImpl.java:79)
at
weblogic.security.internal.ServerPrincipalValidatorImpl.sign(ServerPrincipal
ValidatorImpl.java:59)
at
weblogic.security.service.PrivilegedActions$SignPrincipalAction.run(Privileg
edActions.java:70)
at java.security.AccessController.doPrivileged(Native Method)
at
weblogic.security.service.SecurityServiceManager.createServerID(SecurityServ
iceManager.java:1826)
at
weblogic.security.service.SecurityServiceManager.getServerID(SecurityService
Manager.java:1839)
at
weblogic.security.service.SecurityServiceManager.sendASToWire(SecurityServic
eManager.java:538)
at
weblogic.security.service.SecurityServiceManager.getCurrentSubjectForWire(Se
curityServiceManager.java:1737)
at weblogic.rjvm.RJVMImpl.getRequestStream(RJVMImpl.java:434)
at
weblogic.rmi.internal.BasicRemoteRef.getOutboundRequest(BasicRemoteRef.java:
88)
at
weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java
:255)
at
weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java
:230)
at
weblogic.jndi.internal.ServerNamingNode_WLStub.lookup(Unknown
Source)
atweblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:337)
atweblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:332)
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at weblogic.knex.bean.EJBGenerator$1.run(EJBGenerator.java:101)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
atweblogic.knex.bean.EJBGenerator.lookupAdminHome(EJBGenerator.java:84)
atweblogic.knex.bean.EJBGenerator.ensureAdminHome(EJBGenerator.java:122)
at weblogic.knex.bean.EJBGenerator$6.run(EJBGenerator.java:660)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:821)
atweblogic.knex.bean.EJBGenerator.generateJar(EJBGenerator.java:482)
at
weblogic.knex.dispatcher.DispJar.generateJar(DispJar.java:401)
atweblogic.knex.dispatcher.DispCache.ensureDispUnit(DispCache.java:695)
atweblogic.knex.compiler.JwsCompile.compileJws(JwsCompile.java:872)
at
weblogic.knex.compiler.JwsCompile.compile(JwsCompile.java:619)
at weblogic.knex.compiler.JwsCompile.main(JwsCompile.java:109)
ejbc successful.
Generating EAR ...
The EAR was generated and we can even deploy it on Solaris. But whatdoes
the
AssertionError mean?
Thanks,
Ray
"Anurag Pareek" <[email protected]> wrote:
Ray,
ResourceBundle looks for the properties file in the current thread's
classpath.
Since a Workshop webservice's project is nothing but a webapp, the
properties files can be kept in the WEB-INF/classes directory, which
is part
of the webapp classpath.
You can also use
Thread.currentThread().getContextClassLoader().getResourceAsStream("MyProp
s
properties"); to get access to the properties file.
Thanks,
Anurag
"Ray Yan" <[email protected]> wrote in message
news:[email protected]...
How do we tell Workshop 7.0 where to look for Java properties files(loaded by
PropertyResouceBundle in code) ?
Thanks,
Ray

Need help for how to putting arabic content in java properties file

Hi all,
we have to support arabic in Java application.
For that we are using java propeties file where key and value pair is used.
In the Microsoft excel sheet arabic content is coming properly from right to left direction.
When same thing is copied and paste in java properties file contents direction is reversed that is it is coming from left to right as in english.
Please help how to put the arabic contents in propeties file
Regards
Vidya

So in terms discussion.
First I would suggest that you get a hex editor and validate exactly what is in the properties file. It appears to me that you are using one or more editors that are adjusting the display for you and thus that makes it hard to determine where the problem is. A hex editor should not adjust the display. Although even then you might want to right a simple java app and have it read bytes and print them just to validate that the hex editor isn't doing something.
Only after you are exactly sure how the bytes appear in the file then proceed with other steps.
For the java GUI only test the following.
1. Properties file has it left to right then the java GUI displays it correctly right to left or not?
2. Properties file has it right to left then the java GUI displays it correctly right to left or not?
Myself I would expect that 2 should be the correct way to implement this. However that is dependent upon you correctly invoking the api as well. So if 2 is not working then you might want to look at the api. It might also have something to do with GUI display properties (of which I know even less.)

Java properties file

Hi ,
I am using trying to write data to a java properties file , by using the setProperty method and somehow the order of the data is not by the order of inserting it ,Is there a way to use the setProperty method and still keep the order of data in the file after storing it.
Thanks.

Eddie404 wrote:
I am using trying to write data to a java properties file , by using the setProperty method and somehow the order of the data is not by the order of inserting it ,Is there a way to use the setProperty method and still keep the order of data in the file after storing it.It shouldn't matter what order the Properties class uses to write its data. If it does, you aren't doing something right.
If the order matters, that suggests that somebody is responsible for maintaining the properties via a text editor, or something like that. In which case you shouldn't be using a Properties object which modifies the property file. But as soon as you start having two different processes to maintain the file, you're going to run into trouble. So simplify your life and stop doing that. Either maintain it through the program, or through the text editor, but not both ways.

How to access variables declared in java class file from jsp

i have a java package which reads values from property file. i have imported the package.classname in jsp file and also i have created an object for the class file like
classname object=new classname();
now iam able to access only the methods defined in the class but not the variables. i have defined connection properties in class file.
in jsp i need to use
statement=con.createstatement(); but it shows variable not declared.
con is declared in java class file.
how to access the variables?
thanks

here is the code
* testbean.java
* Created on October 31, 2006, 12:14 PM
package property;
import java.beans.*;
import java.io.Serializable;
public class testbean extends Object implements Serializable {
public String sampleProperty="test2";
public String getSampleProperty() {
return sampleProperty;
}jsp file
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import="java.sql.*,java.util.*"%>
<html>
<head>
<title>Schedule Details</title>
</head>
<jsp:useBean id="ConProp" class="property.testbean"/>
<body>
Messge is : <jsp:getProperty name="msg" property="sampleProperty"/>
<%
out.println(ConProp.sampleProperty);
%>
</body>
</html>out.println(ConProp.sampleProperty) prints null value.
is this the right procedure to access bean variables
thanks

Passing variable from one java source file to another

i have one java source file
one.java
class one {
long a;
a = somevalue;
i have another java source file
second.java
class second{
long b;
// here i need to assign the value of a i.e from one.java to b
i am in great confusion and begineer of java
plz plz help me

a couple of possibilities are
pass a parameter to the constructor
or
use the reference to class Two to call a method in class Two that takes a parameter and sets the value of the attribute in class Two.

Configure properties file that java file uses in OSB.

I have a jar file consisting of java files which maintain the session id in the queue. One main jar depends on 3 more jars for logging.
Also java files in the jar depends on the *.properties file to read the queue length dynamically.
I need to access the main jar from osb proxy server. I used java callout to access the java method provided in the main jar.
My question is: where should I place *.properties which is used by java class, in the osb folder. I don't see how I can add *.properties in the osb console.
Your timely help is greatly appreciated.

sudheshna wrote:
another java class which loads property file...I'm understanding that you don't have way to modify this +"another java class"+, but you have to figure out what strategy it uses to pick up the properties file... classpath? environment variable? absolute path? relative path?
If the file needs to be on the classpath (a common strategy) then you can just place the it in %DOMAIN_HOME%\config\soa-infra... This one is usually in the classpath... Other option is to change setDomainEnv.cmd(setDomainEnv.sh) to add a directory to the classpath and place the file there...
Hope this helps...
Cheers,
Vlad

Direction of middle eastern languages in properties file

Hi,
I am hoping someone can point me to an authoritative source or document specifying which direction the Hebrew / Arabic / Farsi text should be entered in java properties files. That is, does it follow the natural direction of the script (right-to-left) or does it follow the direction of key (left-to-right)? I have tried searching without much luck.
For example:
sample.properties
# english properties file
sample.text=hellosample_he.properties (for the purposes of demonstration I am using english characters, in reality this would be the Hebrew and escaped)
# hebrew properties file using the natural direction (right-to-left)
sample.text=molahsOR is it
# hebrew properties file using the english direction (left-to-right)
sample.text=shalomthanks in advance,
Ben

Why don't you just do a test? It's a simple matter of applying a few Arabic strings to a properties file and checking how it looks in the UI.
Or try thinking about it for a couple of seconds - how would a translator (anybody creating the bidi localized versions) create the left-to-right version you describe?
Anyway, the answer is that bidi text in properties files is entered and stored the way bidi text is entered and stored in any other normal text file.

Changing a .properties file from within a programme

Hi, I was just wondering is there anyway that i can change a .properties file from within a programme?
I have certain values in the .properties file and I want to add a username and password to the file once it has been entered in a login part of the programme.
I have had a look at the docs and can not seem to find any suitable methods.
Cheers Gareth.

store is a good method.
In practical use, sometimes you have a .properties file full of comments (properties files are to be modified by humans, and humans need comments), but they are not retrieved by "load" so they will not be stored back by "store". It's a pity that it happens (the equivalent Windows API, WritePrivateProfileString, has a better behaviour).
Maybe someone has written a method that can modify a properties file, without changing the order of the pairs name=value and without throwing out comments.

How can i write properties file for Hindi font

Hi All,
i'm using jdev 11.1.1.5.0
in my use case i have worked on internationalization where i want to use hindi font
like this link -
Majid Hussain: Internationalization of ADF 11.1.1.3 Applications
as in above post majid used german language and write properties file for german language(which is using english character).
but my problem is that i want to use hindi language
so how can i write propery file which support hindi font.
Manish

Hi Manish,
We also had same requirement where we need to show indian local language(Hindi ,Bengali and many more ).
We had implemented following approach and perhaps it will helpful for you.
1-First we changed the encoding value in jdeveloper.
go to jdeveloper --> tools --->preference-->encoding , select to UTF8
2-We used to get the properties and it's translated value from business and then we were manually put these pair into related resource bundle.
And using this we were able to implemented multilanguage support.
Thanks
Prateek

Use environment variables in logging.properties file

is there a way to use environment variables in logging.properties file?
like this -
java.util.logging.FileHandler.pattern = {$MY_BASE_LOG_FOLDER}/myapp1/log/123%g.logdo I have to write a custom logging.properties loader? if yes, then are there any examples on this?

I'm sorry, but don't you think your answer is useless?
Maybe I haven't made my question clear enough. I need to know if java.util.logging recognizes environment variables in logging.properties files.
If it does not, then there should be a well-known class to use instead of standard loader for logging.properties (java api mention one briefly).

How to use .properties files in Webdynpro Java code?

Hi all,
I want to use a logon.properties file when I initial a JCO connection pool in my webdynpro DC (JCO.addClientPool()),but I found when I deployed this DC to the server, it always giv e me an FileNotFoundException. So I donot know how to deploy a .properties file to the server and how to access this file in my Java code?
Thans and Best regards
Deyang

Hi,
1) put .properties file to your packege under src\packages folder (src\packages\com\sdn\properties\jco.properties)
2) load property:
     final InputStream is = getClass().getClassLoader().getResourceAsStream("com/sdn/properties/jco.properties");
     final Properties properties = new Properties();
     try
          properties.load(is);
     catch(Exception e)
          wdComponentAPI.getMessageManager().reportException(new WDNonFatalException(e), false);
Regatds Maxim R.

File I/O problems using a Properties file

Hi,
I am having troubles reading in a properties file. The file looks like this:
aname=apassword:word2
bname=bpassword:word
...etc
The code I have this far is:
import java.util.*;
import java.io.*;
public class LoginH
public static void main(String[] args)
String logon, pswd;
//String login = null;
//String password = null;
//String nick = null;
int msg = 0;
System.out.print ("Login: ");
logon = MyInput.readString();
System.out.print ("Password: ");
pswd = MyInput.readString();
Properties settings = new Properties();
try
FileInputStream sf
= new FileInputStream("LogonH.ini");
settings.load(sf);
catch (FileNotFoundException e) {}
catch (IOException e) {}
// public void whitespaceChars(58,58)
StringTokenizer st = new StringTokenizer(settings.getProperty(logon));
String password = st.nextToken();
String nick = st.nextToken();
System.out.print (password + nick);
** It works fine if i replace the colon in my properties file with a blank space, However i need to use a colon. I tried to set whitespaceChar to allow this but I can not seem to get it to work. Let me know if you have any ideas. Thanks in advanced.

Thanks. I just got done doing something to that nature however now my problem is if the key field is not in my properties file my program crashes. I need to print out to the console "sorry" if my user name which is my key is not in the properties file. Here is my code if anyone can help me out:
import java.util.*;
import java.io.*;
public class LoginH
public static void main(String[] args)
//******** Declare Variables *********************
String userlogin;
String userpaswd;
String login = null;
String paswd = null;
String nicknm = null;
int match=0;
String delim = ":";
//******** Get username and password **************
System.out.print ("Login: ");
userlogin = MyInput.readString();
System.out.print ("Password: ");
userpaswd = MyInput.readString();
Properties settings = new Properties();
try
FileInputStream sf = new FileInputStream("LogonH.ini");
settings.load(sf);
catch (FileNotFoundException e) {}
catch (IOException e) {}
StringTokenizer st = new
StringTokenizer(settings.getProperty(userlogin),delim);
paswd = st.nextToken();
nicknm = st.nextToken();
if(userpaswd.equals(paswd))
System.out.println("Ok " + nicknm);
match = 2;
else
System.out.println("Sorry " + nicknm);
match = 1;
if (match == 0) System.out.println("Sorry");
}

Using variables in a java.properties file

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