How to iterate list in JSTL?

Question

<c:forEach items="<% EasyLookUp.lookUpList(EasyLookUp.PriceSources); %>" var="priceSourceItem"> ${priceSourceItem } </c:forEach>

this is my code, but the page display

enter image description here

there is just one record, and the java code did not work. can anybody tell me how to handle it?

Community · Accepted Answer · 2017-05-23 11:47:19Z

2

Don't use scriptlets:

Write a Servlet that forwards to your JSP resource. In that Servlet's service(..) method (or the HttpServlet's doXXX(..) method), add a request attribute with the return value of your EasyLookup method.

request.setAttribute("lookupResult", EasyLookUp.lookUpList(EasyLookUp.PriceSources)); // forward to JSP

Then use EL to resolve the attribute in your JSP

<c:forEach items="${lookupResult}" var="priceSourceItem"> ${priceSourceItem } </c:forEach>

edited May 23, 2017 at 11:47

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answered Mar 24, 2014 at 4:35

Sotirios Delimanolis

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5 Comments

Jesse Over a year ago

I got my solution:

<% pageContext.setAttribute("PriceSources", EasyLookUp.lookUpList(EasyLookUp.PriceSources));	%>	<c:forEach items="${PriceSources }" var="priceSourceItem">	${priceSourceItem }	</c:forEach>

but I think your solution is better, but not fit for me.

Sotirios Delimanolis Over a year ago

@jesse Yes, you are using page attributes, which are a scope more restrictive than request attributes. If you take anything away from my answer, it should be this: don't use scriptlets.

Jesse Over a year ago

your anwser is excellent, we should avoid scriptlets, but the attributes in my bean is all original， it can not display on page.

Sotirios Delimanolis Over a year ago

@jesse Sorry, I did not understand. What did you mean by bean and original? You mean you don't know what type lookUpList will return?

Jesse Over a year ago

for example country, the column in bean is countryId, just like 1, 2... but on page, it should show as "US", "UK". My English is not good~ I don't know how to express it accurately

Harshal Patil · Accepted Answer · 2014-03-24 06:15:42Z

In foreach loop of jstl there is no need to pass the list with jstl tag

<c:forEach items="${EasyLookUp.PriceSources}" var="priceSourceItem"> ${priceSourceItem } </c:forEach>

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