How to get boolean value with requst getAttribute java?

java httprequest getattribute
Tom Taylor picture Tom Taylor · Dec 21, 2016 · Viewed 8.8k times · Source

How to get boolean value set as an attribute value in request.

Consider the following snippet

protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException  {

 boolean isOriginal = (boolean) req.getAttribute(“isOriginalFile");
//Some code
}

Where the request may/may not contain the isOriginalFile attribute. How to handle this?

Answer

Tomasz Gawel picture Tomasz Gawel · Dec 21, 2016

Assuming that getting false when attribute is null is what you expect:

boolean isOriginal = Boolean.TRUE == req.getAttribute("isOriginalFile");

Then if you set the attribute to anything else than Boolean.TRUE (including null) you will get false.

You may set it in either way:

req.setAttribute("isOriginalFile", Boolean.TRUE);
req.setAttribute("isOriginalFile", (Boolean) true);
req.setAttribute("isOriginalFile", true);

But not as String (because it will be then evaluated to false):

req.setAttribute("isOriginalFile", "true");

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