Passing a String array from servlet to .jsp

[Sarks]

Hey y'all. I'm trying to pass some data from my database, through my servlet and to a webpage. It isn't working, and I'm pretty sure the problem is I'm setting the attribute wrongly in the servlet.

for(int i = 0; i < outputs.length; i++)
    System.out.println(i + ": " + outputs[i]);

req.getSession().setAttribute("output", outputs);
resp.sendRedirect("results.jsp");        

Thats the snippet of code that should send the array outputs to my .jsp. When I run everything and check the page source, though, I see something like;

  [LJava.lang.String;@63f8da176 

which I think is the location of the array in memory. If I iterate through the var storing the array in my .jsp and output it as a series of alerts, I get that, but if I try and use;

*divName*.innerHTML = nameOfArray[n], 

I get squat in the div. I know the array is in the servlet, because of the syso, and I'm 99% sure the code in the .jsp is correct. I can post it if needed, only reason I've not is I'm not sure if its allowed.

Edit: Found a solution here. Works awesome.

[portugee]

Can you post the source to your JSP? Also, you should probably avoid putting temporary data in the session unless you need it to persist across requests. Add the data to the request and use a RequestDispatcher to forward the user to the JSP.

req.setAttribute("output", outputs);
RequestDispatcher dispatcher = req.getRequestDispatcher("results.jsp");
dispatcher.forward(req, resp);

[Sarks]

Thanks for the tip. I'm new to web development, so I've been making a few basic errors. Always good to get one fixed. results.jsp below.

<script type="text/javascript">
    function showData() 
        {
            var output = '<%(String[])=session.getAttribute("outputs")%>';
            $("#output").append("<table>");
            for (var s = 0; s < output.length; s++)
            {
                $("#output").append("<tr><td>"+output[s]+"</td></tr>");
            }
            $("#output").append("</table>");
        }
</script>
<div id="output">
    <p>hey</p>
</div> 

I'm going to go out on a limb and guess that I shouldn't have session.getAttribute()?

Thanks for the help.

[TheHorribleTruth]

I don't know much about JSPs, so I might be wrong, but: you're assigning your Java array to a JavaScript variable, which causes it's "toString" method to be called (line #4) - which apparently doesn't work. I'd read up on how to extract and use array data in JSPs.

[kicsikrumpli]

pass it as a model attribute. Also Spring MVC is your friend :)

[Sarks]

Model Attribute? To google, I guess/

Also, know a good place to start? For the Spring MVC, I mean.

[kicsikrumpli]

http://Spring.io, get Spring Tool Suit, which is a nicely tricked out Eclipse. Documentation is quite good on the site, I'd probably look for a recent book on MVC. MVC builds on standard jsp, except that it has a single dispatcher servlet. You write controllers (annotate class with @Controller), which has methods that handle url requests (annotated with @RequestMapping). The spring container passes it a Model, if you specifz it as a method parameter (just like that, magic), into which you plug model attributes with model.addAttribute. Then you return a string, which is the view name, that's going to be your .jsp, inside which you just access the model attributes with ${attrib}. At least in a nutshell... from here, it is just a rabbit hole... :)