Why doesn't Tomcat 5.5 resolve variables in jsp?

Question

Java

Hello, I ran into such a problem - there is a packaged application in .war
tomcat 7 deploys without problems, but in tomcat 5.5 the deployment seems to be normal,
but when viewed in a browser, the jsp ${...} variables do not resolve.

I can't find the cause of the problem. Help!

Answer 1

The reason may be in the incorrect version of the servlet api specified in web.xml (version="xx"), specify version 2.4 (for tomcat 5.5):

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd"
         version="2.4">
...

Answer 2

Check the version of servlet-api.jar and jstl.jar

Answer 3

It seems that the jstl library was included in the distribution of Tomcat 7, but it is not in Tomvat 5.5. Do you have jstl jar in your war?
You can read about jstl here: stackoverflow.com/tags/jstl/info