Mysterious Eclipse JSP Validation Errors

user_446738 0
Viewed 56769

Eclipse (Helios) occasionally marks valid looking JSP content as having errors. It seems like it often breaks when I use the <c:if> tag. For example, in a JSP with just this content:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>

<c:if test="${1 == 1}">
something
</c:if>

</body>
</html>

The following errors show in the "Problems" tab after I compile:

  • Incompatible operand types String and int line 1
  • javax.servlet.jsp.JspException cannot be resolved to a type line 1
  • javax.servlet.jsp.PageContext cannot be resolved to a type line 1

The code runs fine. Does the validation for JSPs have issues, am I missing something obvious, or does this indicate something isn't set up correctly.

validation eclipse jsp java
16 Answers

I had the same problem, the problem is the jsp-api library, you can add the dependency to your pom (as explained in other answers) or you can also add the target run-time and eclipse will automatically add that library to your class-path:

Project -> Properties -> Targeted Runtimes

And select your server.

user_12592080
Related