show dynamic data from array in my jsp

[Angus Ferguson]

Hi if I have an array like listDecreasedUs which comes from my business logic, and I want show it dynamically in my JSP.

What kind of code I need? Something like:

  
                  
                   for (var i = 0; i < {$listDecreasedUs.length}; i++) {  
                        
        document.write( listDecreasedUs.valueOf(i));  

But want do it without scriptlets.

Any idea?

Thanks

[Bear Bibeault]

Use JSTL's <c:forEach> action.

Of course what you are showing there is JavaScript, not Java, so I'm not sure if "scriptlets" is really what you meant. Is it?

[Angus Ferguson]

I meant Java.

I have not the possibility to debug, that's way I ask you if this code would works. I have saw that in my IDE when I try to use something like countriesReportList.length() the method length() doesn't appears. Am I missing something?

	<c:forEach var="i" begin="1" end="${countriesReportList.length()}">
   Item <c:out value="${countriesReportList.getIndex(i)}" />
						<p>
					</c:forEach>

Thanks

[Bear Bibeault]

You can't call general methods in the EL (unless you are using the very latest version).

You also didn't mention what countriesReportList is. A List? An array?

You also don't use .get() in the EL. You use array notation, even if it's a List.

[Bear Bibeault]

If countriesReportList is an array or List, the proper syntax would be:

<c:forEach items="${countriesReportList}" var="report">  
   Item <c:out value="${report}" />  
</c:forEach>  

Note that you don't need to keep track of indexes and use array subscripting at all.

[Angus Ferguson]

countriesReport is an array an I want retieve it from the request like this

request.setAttribute("countriesReport", countriesReport);

Is that posbile?

Thanks

[Bear Bibeault]

Angus Ferguson wrote:countriesReport is an array

What happened to countriesReportList? Or did you just change the name?

an I want retieve it from the request like this

request.setAttribute("countriesReport", countriesReport);

I assume that's the code from the servlet controller that creates the scoped variable?

Is that posbile?

Of course. As I said, either an array or List (or even Map) can be iterated over with <c:forEach>