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Difference between @ConditionalOnClass, @ConditionalOnMissingClass?

Can someone give me the difference between these annotations?

Balakirethiga R
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3 Answers3

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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

Takrem
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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.

Vasily Liaskovsky
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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.

Ravindra
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