Difference between @ConditionalOnClass, @ConditionalOnMissingClass?

Can someone give me the difference between these annotations?

CodePudding user response：

You can mark a bean class with any of the annotations, but they do opposite things. @ConditionalOnClass includes bean of marked class if annotation's parameter is present on classpath. Whereas @ConditionalOnMissingClass includes it if the class is absent.

These annotations are important part of autoconfiguration process when Spring chooses appropriate bean type based on application classpath.

CodePudding user response：

With these annotations, spring will selectively skips the configuration based on the absence / presence of certain classes mentioned in the annotations.

This link (article) might help you to get more details on the same.

CodePudding user response：

Spring @ConditionalOnClass and @ConditionalOnMissingClass annotations let @Configuration classes be included based on the presence or absence of specific classes. So @ConditionalOnClass loads a bean only if a certain class is on the classpath and @ConditionalOnMissingClass loads a bean only if a certain class is not on the classpath.

More here