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From Pilho Kim <ph...@math.soongsil.ac.kr>
Subject Re: setProperty and <input type="image" ..>
Date Thu, 01 Jan 1970 00:00:00 GMT
> 
> Perhaps this is more of a problem with the JSP Spec, but setting properties 
> on a bean with jsp:setProperties for a form with multiple image submit 
> buttons seems to be an impossibility.
> 
> Specifically, the problem is that forms with image inputs produce strings in 
> the request object that look like "blah.x=10 blah.y=23" (mouse position) 
> where regular submit buttons just produce "blah=value". Naming methods in 
> the bean getBlah.X() and getBlah.Y() doesn't work, since the "." has special 
> meaning in Java.


In Servlet source:

    public Point getBlahPoint(HttpServletRequest req) {
        int x = Integer.parseInt(req.getParameter("blah.x"));
        int y = Integer.parseInt(req.getParameter("blah.y")); 
        return new Point(x, y);
    }


In JSP source:

    Point bp = blahBean.getBlahPoint(request);
    int x = bp.x; 
    int y = bp.y;



> 
> For forms with only one image submit, adding a hidden tag with the same name 
> seems to fix the problem.  For forms with multiple image submit buttons, 
> there doesn't seem to be a good fix.
> 
> It also looks like setting the properties with parameter="blah.x" could be 
> promising, but this is rather awkward since it means that *all* other 
> properties for the bean must also be set individually.
> 
> How does tomcat handle request parameters with names containing periods in 
> relation to <jsp:setProperty name="blahBean" property="*"/>?  How should 
> they be handled?
> 
> Thanks!
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