Maven- POM.xml中依赖项排序的意义

Question

What is the significance of dependencies in pom.xml?

I have the dependencies in the following order:

1. CGLIB
2. Apache Commons
3. Spring Data
4. Hibernate
5. MySQL Connector
6. Spring

If I insert Spring Security dependencies above Spring, anywhere, I get errors. For example, if I insert the two dependencies at the very top, I get this exception (also a compiler error before running):

java.lang.NoClassDefFoundError: org/springframework/core/env/EnvironmentCapable

Answer 1

Dependencies order is insignificant in Maven.

After adding your Spring Security dependencies you need to remove your Spring dependency, because Spring Security references a different version of Spring which does contain this class.

So removing Spring dependency should fix this.