1.添加依赖
<!--spring-缓存依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<!--方式二还需添加的依赖-->
<dependency>
<groupId>com.github.ben-manes.caffeine</groupId>
<artifactId>caffeine</artifactId>
<version>2.9.2</version>
</dependency><!--spring-缓存依赖-->
<dependency>
