spring boot mvc: failed after following the sample

Question

I am following the link https://github.com/spring-guides/gs-serving-web-content

After check out the files, import gs-serving-web-content/complete into IDEA, and run it.

Answer 1

The following

java.lang.NoClassDefFoundError: org/apache/tomcat/util/log/UserDataHelper

means that you're lacking a tomcat-july.jar.

The following, however,

Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)

means that you have a corrupted dependency. My bet would be that the embedded tomcat dependencies did not got downloaded properly. If I were you, I would back-up and delete the .m2\repository\org\apache\tomcat\embed and run the example again, so that it downloads the dependencies again