springboot 本地缓存

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-cache</artifactId>
    </dependency>
    <dependency>
        <groupId>com.github.ben-manes.caffeine</groupId>
        <artifactId>caffeine</artifactId>
    </dependency>
</dependencies>

spring:
  cache:
    type: caffeine
    caffeine:
      spec: maximumSize=500,expireAfterAccess=60s

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;

@SpringBootApplication
@EnableCaching
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Cacheable("users")
    public User getUserById(Long id) {
        // 模拟从数据库中获取用户
        return new User(id, "John Doe");
    }
}

import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Cacheable("users")
    public User getUserById(Long id) {
        // 模拟从数据库中获取用户
        return new User(id, "John Doe");
    }

    @CachePut(value = "users", key = "#user.id")
    public User updateUser(User user) {
        // 模拟更新数据库中的用户
        return user;
    }

    @CacheEvict(value = "users", key = "#id")
    public void deleteUser(Long id) {
        // 模拟删除数据库中的用户
    }
}