use a URL object to read a resource in web content

Im working in a web application using JSF2 and in one of my forms I create a PDF file that contains a image and a specific font. The ressorces are located in the WebContent directory. My problem is when I want to create the pdf File I want to read the ressources and pass it in parameters to the method creating PDF FILE. I dont know how to use the URL object or any ot开发者_运维百科her way to do the task.

Thanks.

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The ressorces are located in the WebContent directory.

WebContent directory is just for development environment under eclipse. When deployed the files there would go into the root of the web-app. So I take it that you want to access files in the root of your web-app.

You can use ServletContext.getResource(String path) with a path as "/myFileName" where the / signifies the web-app context root.

To get the reference to the ServletContext you may try this

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The URL class has an openStream() method which gives you an InputStream of the resource's content:

URL resource = externalContext.getResource("/image.png");
InputStream input = resource.openStream();
// ...

You can also immediately get the resource as stream without getting it as URL first:

InputStream input = externalContext.getResourceAsStream("/image.png");
// ...

Having the InputStream, you can just read it into whatever target object which your PDF creator is expecting as input.