mybatisplus开启二级缓存

以下是两种开启MyBatis Plus二级缓存的方法：

1. 在启动类上添加@EnableCaching注解，并在需要缓存的Service层方法上添加@Cacheable注解。

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

@SpringBootApplication
@EnableCaching // 允许二级缓存
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(value = "SeatPerson", key = "#areaNo")
    public User getUserByAreaNo(String areaNo) {
        // 从数据库中查询用户信息的逻辑
        // ...
    }
}

2. 在MyBatis Plus的配置文件中开启二级缓存。

<!-- mybatis-config.xml -->
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true" /> <!-- 开启二级缓存 -->
    </settings>
</configuration>

import org.apache.ibatis.annotations.CacheNamespace;
import org.apache.ibatis.annotations.Mapper;

@Mapper
@CacheNamespace // 开启二级缓存
public interface UserMapper {
    // ...
}