I have a bunch of iReport source code (jrxml) locate inside the workspace with the following path:
<project>/report/<jrxml_file>
When I pack my source code into jar file. I will have this file structure directory:
<jar_file>/report/<jrxml_file>
In my source code, I have these code to validate the existence of the jrxml file:
File file = new File("report/jrxml_file");
if (!file.exists()) {
return false;
}
When I execute this jar file through the command:
java -jar MyJar.jar
I hit an error mention that the particular jrxml_file doesn't exists.
My doubt:
- I am just curious to know whether am I allow to read the jrxml_file which is locate inside MyJar.jar?
- Do I need to extract the jrxml_file to a physical directory before I can read it?
THanks @!
If the file is on top of your jar at given path, you can use this:
ReplyDeleteInputStream is = this.getClass().getResourceAsStream("/report/jrxml_file");
See Java Class docs:
http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Class.html#getResourceAsStream(java.lang.String)
From there, you can read it as any other InputStream, for example using Apache IOUtils, as explained here:
In Java, how do I read/convert an InputStream to a String?