Properties file not found - how to locate it as resource?

Question

I have a properties file at location (from netbeans project explorer)

-MyTest
    +Web Pages
    +Source Packages
    -Test Packages
        -<default package>
            +Env.properties     <---- Here it is
        +com.mycomp.gts.test
        +com.mycomp.gts.logintest
        .....
        ....

Now when I am trying to find this file using code

InputStream propertiesInputStream = getClass().getResourceAsStream("Env.properties");
ENV.load(propertiesInputStream);

Its throwing java.lang.NullPointerException

This answer may helps in your case as well: http://stackoverflow.com/a/8854824/122442 — Csaba_H, Apr 09 '13 at 06:34

score 7 · Accepted Answer · answered Apr 09 '13 at 06:22

You cannot use the class as a reference to load the resource, because the resource path is not relative to the class. Use the class loader instead:

InputStream propertiesInputStream = getClass().getClassLoader()
        .getResourceAsStream("Env.properties");
ENV.load(propertiesInputStream);

Or alternatively, you can use the context class loader of the current thread:

InputStream propertiesInputStream = Thread.currentThread()
    .getContextClassLoader().getResourceAsStream("Env.properties");
ENV.load(propertiesInputStream);

score 1 · Answer 2 · answered Apr 09 '13 at 06:24

1

String basePath = PropertiesUtil.class.getResource("/").getPath();
InputStream in = new FileInputStream(basePath + "Env.properties");
pros.load(in);

Good luck:)

answered Apr 09 '13 at 06:24

Hunter Zhao

4,589
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it refer to any class is ok. – Hunter Zhao Apr 09 '13 at 06:31
build failed: cannot find symbol class PropertiesUtil – coure2011 Apr 09 '13 at 06:34
replace PropertiesUtil with any class in classpath, my solution is absolutely OK. – Hunter Zhao Apr 09 '13 at 06:37
at run time basePath is /build/web/WEB-INF/classes/ but my properties file is in /build/test/classes/ – coure2011 Apr 09 '13 at 06:56

score 1 · Answer 3 · answered Apr 09 '13 at 06:37

1

Try to get absolute path with:

String absolute = getClass().getProtectionDomain().getCodeSource().getLocation().toExternalForm();

You can print out the string absolute and try to substring it to your path of your properties file.

answered Apr 09 '13 at 06:37

sk2212

1,688
4
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score 0 · Answer 4 · edited Nov 03 '20 at 21:14

The below code reads a property file stored within the resources folder of a Maven project.

InputStream inputStream = YourClass.class.getResourceAsStream("/filename.properties");
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
    
Properties properties = new Properties();
properties.load(reader);
  
} catch (IOException ioException) {
    ioException.printStackTrace();
}

Properties file not found - how to locate it as resource?

4 Answers4