The absolute uri: http://www.springframework.org/tags cannot be resolved in either web.xml or the jar files deployed with this application

Question

I know that this question had been asked before. But none of the previous answers apply to my case. I am using gradle and spring boot. When I use

gradlew bootRun

everything is OK. But when I use

gradlew clean build && java -jar build\\libs\\myjar.jar

I get the following error when I open my jsp files

The absolute uri: http://www.springframework.org/tags cannot be resolved in either web.xml or the jar files deployed with this application

What is the difference between bootRun and clean build && java -jar? If there is a problem in my build.gradle then how come bootRun runs successfully? Thanks for your answers.

Answer 1

In short: the classloader is different. There are some limitations to using JSP with Spring Boot embedded applications. especially taglibs. In particular it never works with Jetty. Tomcat should be OK if you stick to a WAR format. If I were you I'd stay away from JSP, as there are so many better ways to write a view layer now.