在Openshift上的servlet中打开资源文件

Question

I'm in troubles with opening file within my web-app. I tried it locally within Eclipse and it works fine but when I try to deploy it on Tomcat 6 on Openshift it doesn't find resource files for my web-app. There are some txt files in a ProjectFiles directory stored in WEB-INF directory; the code that locally opens file is

String nome_file = "C\:\\Users\\miKKo\\workspace\\fantacalcio_project\\WebContent\\WEB-INF\\ProjectFiles\\Risultati\\risultati_" + nome_lega + ".txt"; 

BufferedReader reader = new BufferedReader(new FileReader(nome_file));

I've pushed them within Git in the same repository (on server I renamed my project in "ROOT") and I've substituted string with this

String nome_file = this.getServletConfig().getServletContext().getContextPath()+"/WebContent/WEB-INF/ProjectFiles/Risultati/risultati_" + nome_lega + ".txt";

but it doesn't work. I've also tried with a context attribute

/var/lib/openshift/51c6178a5004467630000019/jbossews/work/Catalina/localhost/_/WEB-INF/ProjectFiles

but the thrown exception is always

java.io.FileNotFoundException: (#path) (No such file or directory)

What can I do for this?

Answer 1

Say your file is in the following location:

/WEB-INF/ProjectFiles/Risultati/risultat_text_file.txt

Then using:

String path = "/WEB-INF/ProjectFiles/Risultati/risultat_text_file.txt";
InputStream inputStream =  new FileInputStream(this.getServletConfig().getServletContext().getRealPath(path));

Should work for you. Note that, ServletContext.getRealPath() return the real OS path corresponding to the given virtual path.

Edit:

If this doesn't work for your case, you really need to revisit your virtual path. You can manually check that does this file exist in the expected directory in the war file or you can log the output of the getRealPath() method to examine what's really going on! If necessary you can put "/" in your getRealPath() method and examine what is your application's root path.

Answer 2

Since I don't get application's root realpath, I resolved in this way:

String path="/WEB-INF/ProjectFiles/Risultati/risultati_test.txt";
InputStream inputStream = this.getServletConfig().getServletContext().getResourceAsStream(path);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

and now it works. By the way, I also found useful informations here

getResourceAsStream() vs FileInputStream