从Java Applet中的Jar文件中提取文件

Question

I have a java applet that contains resources directory (Directory name is: Resources) this directory contains some dll files. (This directory/folder is packaged in the jar file for the applet).

I am trying to extract the contents of this directory to the local hard disk. I am using

getClass().getClassLoader().getResourceAsStream("Resources/" + fileName);

to get the file and save it to another path so i can access it. This method is working before deploying/embedding my applet to a HTML page.

I Have two problems:

1- After deploying on a web server, this method returns null.

2- How to enumerate all files in the resources folder after deploying my applet, so that i can save these files to another path.

Sorry if my question is stupid, simple or unclear because this is the first Java applet for me.

Answer 1

I am suggesting an alternative for your second question. You could run OS commands in your java code to do these operations. If you are on a linux environment to extract the whole folder and copy somewhere else you can run

jar xf yourjarfile.jar Resources
cp -rf Resources toSomewhereElse/

in your java code. You can find examples here to see how to run OS commands in your Java code.