Error abotut dynamic web module version reported by STS
问题 I've created a web project in STS 2.9.2 using Spring 3.0.6 and Maven 3.0.3. I've created some pages and code with no errors. I've upgraded Spring libraries version from 3.0.6 to 3.1.2 in project's pom.xml and now I get following error message: Dynamic Web Module 3.0 requires Java 1.6 or newer. Dynamic web module version and Java compiler version in project's faces are set to 2.5 and 1.6 respectively. Also set JRE system library for my project to 1.6. I've tried to remove Maven nature and then