SpringBoot Cache 配置本地缓存

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>

2.配置Cache

(1).配置1（在Application启动类添加@EnableCaching注解）

@SpringBootApplication
@MapperScan("com.xxxx.dao")
@EnableCaching
public class AxxxxApplication {

    public static void main(String[] args) {
        SpringApplication.run(AxxxxApplication.class, args);
    }

}

(2).配置2（配置cache的缓存类型，这里主要介绍的本地缓存）

//方式一：ConcurrentMapCache （不好设置过期时间）
@Configuration
public class SpringCachingConfig {

     @Bean
     public CacheManager cacheManager() {
          SimpleCacheManager cacheManager = new SimpleCacheManager();
          Set<ConcurrentMapCache> mapCaches=new HashSet<>();
          //配置cache类型与目录
          mapCaches.add(new ConcurrentMapCache("cacheNames1"));
          mapCaches.add(new ConcurrentMapCache("cacheNames2"));
          mapCaches.add(new ConcurrentMapCache("cacheNames3"));
          mapCaches.add(new ConcurrentMapCache("cacheNames4"));
          cacheManager.setCaches(mapCaches);
          cacheManager.afterPropertiesSet();
          return cacheManager;
     }

}


//方式二：CaffeineCache （可设置过期时间）
@Configuration
public class SpringCachingConfig {

     @Bean
    public CacheManager cacheManager() {
        SimpleCacheManager cacheManager = new SimpleCacheManager();

        List<CaffeineCache> caffeineCaches = new ArrayList<>();

        //SysConstants.CACHE_NAMES=new ArrayList(
        //Arrays.asList("cacheNames1","cacheNames2","cacheNames3","cacheNames4")
        //);
        for (String  cacheName: SysConstants.CACHE_NAMES) {
            caffeineCaches.add(new CaffeineCache(cacheName,
                    Caffeine.newBuilder()
                            .initialCapacity(50)
                            .maximumSize(30000)//最大存储数量
                            .expireAfterWrite(2, TimeUnit.HOURS)//过期时间2 小时
                            .build()));
        }
        cacheManager.setCaches(caffeineCaches);
        return cacheManager;
    }

}


//方式三。。。。还可以配置redis以及其他的方式，这里主要介绍以上两种方式

3.使用

//控制器1
@RestController
@RequestMapping("/path1")
@Cacheable(cacheNames = "cacheNames1" ,key="#root.methodName+#a0" )
public class Controller1 {

}

//控制器2
@RestController
@RequestMapping("/path2")
@Cacheable(cacheNames = "cacheNames2" ,key="#root.methodName+#a0" )
public class Controller2 {

}

//控制器3
@RestController
@RequestMapping("/path3")
@Cacheable(cacheNames = "cacheNames3" ,key="#root.methodName+#a0" )
public class Controller3 {

}

//控制器4
@RestController
@RequestMapping("/path4")
@Cacheable(cacheNames = "cacheNames4" ,key="#root.methodName+#a0" )
public class Controller4 {

}

SpringBoot Cache 配置本地缓存

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