我已将 Redis 缓存添加到我的项目中，并且缓存可以自行工作，但加载缓存值失败，并出现以下异常:
java.lang.ClassCastException: class com.dto.FilterOptionsDto cannot be cast to class
com.dto.FilterOptionsDto (com.dto.FilterOptionsDto is in unnamed module of loader 'app';
com.dto.FilterOptionsDto is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader @3d0da857)
at ....
缓存配置
@Configuration
@EnableConfigurationProperties({CacheProperties.class})
public class RedisConfig {
@Bean
RedisCacheManagerBuilderCustomizer redisCacheManagerBuilderCustomizer(CacheProperties cacheProperties) {
return builder -> {
Map<String, RedisCacheConfiguration> configurationMap = new HashMap<>();
configurationMap.put(CacheNames.IDP_USER_PROFILES, RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(cacheProperties.getIdpUserProfilesTtlSeconds())));
configurationMap.put(CacheNames.STIBO_STORES_FILTER_OPTIONS, RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(cacheProperties.getIdpUserProfilesTtlSeconds())));
builder.withInitialCacheConfigurations(configurationMap);
};
}
@Bean
public RedisTemplate<String, Object> redisTemplate() {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(new LettuceConnectionFactory());
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
return redisTemplate;
}
}
缓存使用
@Override
@Cacheable(value = CacheNames.STIBO_STORES_FILTER_OPTIONS)
public FilterOptionsDto getStoresFilterOptions(CountryEnum country, boolean includeClosedStores, boolean includeSingleOptions) {
注意:FilterOptionsDto 实现了可序列化。我发现序列化的值被保存到redis数据库中，但是每当spring尝试将其反序列化回来时，它就会失败。
类似问题:Problem in deserialize redis-cache to objects in Spring-boot
最佳答案
解决方案很奇怪，但很简单 - 删除 devtools 依赖项。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
关于spring-boot - Redis无法反序列化对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/64537394/