how to assign a value to a variable fetched from java bean over JSP?

Question

I am working on JSP and servlets. I need to fetch values from java bean and assign it some other variable over JSP.

Usually I fetch the value in html tags as ${abcd.variable_name}

but this thing can't be used it we want to get some value in <% %>

@DaveNewton - I need to get String value from bean so that i can further pass it into FusionChart String — Dhruv, Oct 19 '11 at 18:10
@DaveNewton - Yes, It is a small snippet. Just to fetch string and pass it into DOM parser. — Dhruv, Oct 19 '11 at 18:17

score 0 · Accepted Answer · edited May 23 '17 at 09:59

0

That depends on where the bean is stored. If it is stored in the request scope as a request attribute, just get it back as request attribute:

<%
    Bean bean = (Bean) request.getAttribute("bean");
    // ...
%>

Or if it's stored in the session scope as a session attribute, just get it back as session attribute:

<%
    Bean bean = (Bean) session.getAttribute("bean");
    // ...
%>

Or if it's stored in the application scope as an application attribute, just get it back as application attribute:

<%
    Bean bean = (Bean) application.getAttribute("bean");
    // ...
%>

However, you're doing the desired job at the wrong place. It has to be done in a normal Java class like a servlet or at least the action class of the MVC framework you're using, if any.

edited May 23 '17 at 09:59

Community

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answered Oct 19 '11 at 18:54

BalusC

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Masterreportrequest.java is my servlet and Buildingmasterservice.java is my bean class. In servlet this is how i forward variables - request.setAttribute("buildmast", building_master); so should i call bean class or servlet in and then further how to write my Bean bean = (Bean) request.getAttribute("bean"); – Dhruv Oct 19 '11 at 19:47
1

You don't need `` at all when you're already using servlets. It would only duplicate and confuse everything. You have stored it as a request attribute with name `"buildmast"` in the servlet, so you should also get it as such: `BuildingMaster buildingMaster = (BuildingMaster) request.getAttribute("buildmast");`. – BalusC Oct 19 '11 at 19:53
Actually i had tried this but it show an error in this line saying "BuildingMaster cannot be resolved to a type" – Dhruv Oct 19 '11 at 20:26
You've to import it by `<%@page import="com.example.BuildingMaster" %>` in top of JSP. By the way, why not just doing the preparing job in the servlet? You keep fiddling with ugly and old fashioned *scriptlets* while you're already using a servlet which can just prepare exactly the data you need for the JSP. – BalusC Oct 19 '11 at 20:34

how to assign a value to a variable fetched from java bean over JSP?

1 Answers1