An error is reported after the @resource annotation is introduced into the spring project

Solution:

@Resource annotations are provided by J2EE

However, jdk1.9 and above versions need to import a javax.annotation dependency package from pom.xml in maven:

<dependencies>
    <dependency>
        <groupId>javax.annotation</groupId>
        <artifactId>javax.annotation-api</artifactId>
        <version>1.3.2</version>
    </dependency>
</dependencies>

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