How Can I read text file in liferay?

Question

I have tried to read a file from controller class with this code

    ReadFile readFile = new ReadFile();
    String text = readFile.readFile("\resources\testing.txt");
    renderRequest.setAttribute("text", text);

I have fetched it from view.jsp as

    <%
    String content = (String)request.getAttribute("text");
    %>

But I am getting file not found exception. What is the way to get file content.

Answer 1

In a Java string, \ starts an escape sequence and "\r" and "\t" are escaped characters. For example "\t" is a string with the tab character. If you literally need \t in a string, you'll have to escape the backslash

doSomething("\\resources\\testing.txt");

or just eliminate the hassle: Java operates well when you use the forward slash as directory separator

doSomething("/resources/testing.txt");

Note that this refers to a file in the root directory of whatever drive the current path is on, it might be C:\resources\testing.txt or D:\resources\testing.txt - unless your ReadFile implementation manipulates the path somehow (which I leave up to your judgement). You can test this independent of Liferay, just in a command line application. The exception gets thrown way before your jsp gets displayed (I've changed the tags to flag the relevance)

This is pure Java, completely independent of Liferay.