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This article mainly introduces the relevant knowledge about how to solve the failure of @ Autowired automatic injection interface. The content is detailed and easy to understand, easy to operate, and has a certain reference value. I believe you will gain something after reading this article on how to solve the failure of @ Autowired automatic injection interface. Let's take a look.

@ Autowired auto injection interface failed

There is a time when automatic injection cannot be injected.

You can do this.

And solve the problem.

@ Repository// * @ Repository it is used to identify the class of the data access layer (DAO layer) as Spring Bean. / / * at the same time, it can encapsulate the data access exception thrown in the annotated class as the data access exception type of Spring @ Autowired automatic injection failure report null pointer exception

In the same Controller, all methods either start with public or all start with private or an error will occur.

I don't know why.

I encountered this problem today.

In the current Controller, all methods start with public but this one always reports a null pointer exception when accessing automatically injected properties starting with private.

Private became normal after it was changed to public.

This is the end of the article on "how to solve the failure of @ Autowired automatic injection interface". Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to solve the failure of @ Autowired automatic injection interface". If you want to learn more, you are welcome to follow the industry information channel.

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