Loading Properties from a JAR file (java 1.6)

Question

I manually inject a properties file inside a jar. How to load properties from a jar file before java 1.7 ? I tried many workarounds and nothing worked so far.

There's plenty questions about it, but everything is focused on ClassLoader methods from java 1.7.

possible duplicate of http://stackoverflow.com/questions/2815404/load-properties-file-in-jar — Sajan Chandran, Sep 23 '14 at 15:55
@SajanChandran No it isn't, the OP asked to not use a method of `ClassLoader`, which is wanted by the poster in your link — msrd0, Sep 23 '14 at 16:04
if you see the solution given in the question, it exactly answers the question (no usage of Classloader) — Sajan Chandran, Sep 23 '14 at 16:05
@SajanChandran A duplicate isn't marked by the answers but by the question (or did I get that wrong?) — msrd0, Sep 23 '14 at 16:06

score 2 · Accepted Answer · answered Sep 23 '14 at 16:00

2

When you have a properties file inside your classpath or inside your jar file it becomes a resource. Any other case is a simple file.

What you need to do, before you package your jar file, is add to your classpath the folder where the properties files are (i.e myproject/src/main/resources/) then wherever you do a

Properties properties = new Properties(); 
properties.load(MyClass.class.getResourceAsStream("/yourPropsFileName"));

it will load it!

Although, if you are using an external property file you can also load it by using:

Properties properties = new Properties();
properties.load(new FileInputStream("extenalPropsFileLocation"));

Hope it helps!

answered Sep 23 '14 at 16:00

Cesar Villasana

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How java determines the path to resources? What if I put it without any directory, just raw copy paste inside of jar? – krzakov Sep 23 '14 at 17:32
How are you creating your jar? are you using maven or similar? – Cesar Villasana Sep 23 '14 at 18:59
No, just standard jar export. It's very simple program. – krzakov Sep 23 '14 at 20:37
But I inject this properties file later, that's the catch. I cannot be solved like this. – krzakov Sep 24 '14 at 09:07
I get some weird error about cannot load map$entry X_x' – john k Sep 08 '20 at 18:30

score 0 · Answer 2 · edited Sep 23 '14 at 16:34

0

From some class, call:

getClass().getResourceAsStream("/path/to/props.props")

Make sure that the path matches up with a classpath location.

edited Sep 23 '14 at 16:34

msrd0

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answered Sep 23 '14 at 15:43

Rocky Pulley

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That's what I said before. There's not such a method like getClass() in Object before java 1.7 – krzakov Sep 23 '14 at 17:29
every object has the method getClass() long before java 1.7 – Rocky Pulley Sep 24 '14 at 12:31

Loading Properties from a JAR file (java 1.6)

2 Answers2

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