使用Spring Cache抽象接口 + redis實現數據緩存

1.依賴引入

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

2.配置

/**
 * @author tlj
 * @date 2019/11/9
 */
@Configuration
public class AsyncConfig {
   
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        return new RedisCacheManager(
                RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory),
                this.getRedisCacheConfigurationWithTtl(3600), // 默認策略，未配置的 key 會使用這個
                this.getRedisCacheConfigurationMap() // 指定 key 策略
        );
    }

    private Map<String, RedisCacheConfiguration> getRedisCacheConfigurationMap() {
        Map<String, RedisCacheConfiguration> redisCacheConfigurationMap = new HashMap<>();
        // 對指定Cache進行過期時間配置
        redisCacheConfigurationMap.put("tes1", this.getRedisCacheConfigurationWithTtl(30));
        return redisCacheConfigurationMap;
    }

    private RedisCacheConfiguration getRedisCacheConfigurationWithTtl(Integer seconds) {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        redisCacheConfiguration = redisCacheConfiguration.serializeValuesWith(
                RedisSerializationContext
                        .SerializationPair
                        .fromSerializer(jackson2JsonRedisSerializer)
        ).entryTtl(Duration.ofSeconds(seconds));

        return redisCacheConfiguration;
    }

    /**
     * KeyGenerator
     *
     * @return
     */
    @Bean
    public KeyGenerator wiselyKeyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append("." + method.getName());
                if(params==null||params.length==0||params[0]==null){
                    return null;
                }
                String join = String.join("&", Arrays.stream(params).map(Object::toString).collect(Collectors.toList()));
                String format = String.format("%s{%s}", sb.toString(), join);
                //log.info("緩存key：" + format);
                return format;
            }
        };
    }



}

3.開啓緩存

@SpringBootApplication
@EnableCaching  //開啓緩存
public class TestSpringbootApplication {


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

}

4.在target方法上使用

@Service
public class TestServiceImpl {
    @Cacheable(value = "tes1",key = "#key1")//清空緩存
    public String doTest1(String key1){
        return "test1111111111";
    }
}