Question

我正在使用Spring-boot + Redis将数据存储在缓存中。

我的控制器具有以下配置：

public class CacheController {    
@GetMapping("/{key}")
    @Cacheable(value = "myCacheValue", keyGenerator = "customKeyGenerator")
    public String getByKey(@PathVariable("key") String key) {
        return key + System.currentTimeMillis();
    }
}

我的customKeyGenerator是：

public class CustomKeyGenerator implements KeyGenerator {
    public Object generate(Object target, Method method, Object... params) {
        StringBuilder sb = new StringBuilder();
        sb.append(target.getClass().getSimpleName())
                .append("-")
                .append(method.getName());

        if (params != null) {
            for (Object param : params) {
                sb.append("-")
                        .append(param.getClass().getSimpleName())
                        .append(":").append(param);
            }
        }
        return sb.toString();
    }
}

当我连接Redis时，我具有以下密钥：

1 - redis-cli --raw
KEYS *
myCacheValue~keys
��t$CacheController-getByKey-String:key9

2 - redis-cli
KEYS *
myCacheValue~keys
\xac\xed\x00\x05t\x00$CacheController-getByKey-String:key9

为什么这些字符出现在“ CacheController”之前？

注意：我的密钥生成器以我的班级名称开头。

我希望我的密钥名称仅是这样： CacheController-getByKey-String：myKey

Answer 1

在doc中，您可以使用RedisCacheConfiguration Bean自定义redisCacheManager：

@Configuration
public class CacheConfiguration {
    @Bean
    public RedisCacheConfiguration redisCacheConfiguration() {
    return RedisCacheConfiguration.defaultCacheConfig();
    }
}

，默认配置为：

    public static RedisCacheConfiguration defaultCacheConfig() {

    DefaultFormattingConversionService conversionService = new DefaultFormattingConversionService();

    registerDefaultConverters(conversionService);

    return new RedisCacheConfiguration(Duration.ZERO, true, true, CacheKeyPrefix.simple(),
            SerializationPair.fromSerializer(new StringRedisSerializer()),// this will use string as the key serializer
            SerializationPair.fromSerializer(new JdkSerializationRedisSerializer()), conversionService);
}

Answer 2

我解决了我的问题。我正在搜索并发现this post。

我更改了代码以使用RedisTemplate的某些属性：

@Bean
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory cf) {
    RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(cf);

    configureSerializers(redisTemplate);

    JedisConnectionFactory jedisConnectionFactory = (JedisConnectionFactory) cf;
    JedisPoolConfig actualPoolConfig = jedisConnectionFactory.getPoolConfig();
    jedisConnectionFactory.setPoolConfig(createJedisPoolConfig(actualPoolConfig));

    return redisTemplate;
}

private void configureSerializers(RedisTemplate<String, String> redisTemplate) {
    RedisSerializer<String> serializerKey = new StringRedisSerializer();
    redisTemplate.setKeySerializer(serializerKey);
    redisTemplate.setHashKeySerializer(serializerKey);

    Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
    ObjectMapper om = new ObjectMapper();
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    om.configure(
            DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    jackson2JsonRedisSerializer.setObjectMapper(om);

    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
    redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
}

问题是因为默认的序列化器是“ JdkSerializationRedisSerializer”，现在我正在使用“ StringRedisSerializer”来生成密钥。为了产生价值，我使用“ Jackson2JsonRedisSerializer”在JsonValue中转换数据。

现在，我的按键没有“奇怪”字符。

Spring Boot + Redis-生成一个奇怪的密钥

2 个答案: