Spring boot 無法從 redis 緩存序列化器讀取數據。SerializationException：無法反序列化

Question

我正在嘗試制作從 redis 緩存讀取數據的 Spring Boot 應用程序。 但是我不能。

首先我調用 post api 來創建用戶，然后我調用 get api 到getUserById但我收到這樣的錯誤：

java.lang.ClassNotFoundException: com.umut.redis.redisExample.Model.UserEntity 在 java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na] 在 java.base/jdk .internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na] 在 java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na] 在 java .base/java.lang.Class.forName0(Native Method) ~[na:na] 在 java.base/java.lang.Class.forName(Class.java:398) ~[na:na] 在 org.springframework。 boot.devtools.restart.classloader.RestartClassLoader.loadClass(RestartClassLoader.java:145) ~[spring-boot-devtools-2.5.6.jar:2.5.6] 在 java.base/java.lang.ClassLoader.loadClass(ClassLoader .java:521) ~[na:na] 在 java.base/java.lang.Class.forName0(Native Method) ~[na:na]

我正在運行 docker 容器到 redis。

@Configuration
@EnableCaching
public class RedisCacheConfiguration {

    @Bean
    JedisConnectionFactory jedisConnectionFactory() {
        JedisConnectionFactory jedisConFactory
                = new JedisConnectionFactory();
        jedisConFactory.setHostName("localhost");
        jedisConFactory.setPort(6379);
        return jedisConFactory;
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> template =new RedisTemplate<>();
        template.setHashValueSerializer(new StringRedisSerializer());
        template.setConnectionFactory(jedisConnectionFactory());
        return template;
    }

}



@Service
public class UserServiceImpl implements IUserService{

    private final UserRepository userRepository;

    public UserServiceImpl(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    public UserDto createUser(CreateUserRequest createUserRequest){
         UserEntity userEntity = new UserEntity();
         userEntity.setName(createUserRequest.getName());
         userEntity.setSurname(createUserRequest.getSurname());
         userRepository.save(userEntity);
         return UserMapper.INSTANCE.userEntityToUserDto(userEntity);
    }

    @Cacheable(cacheNames = "user", key = "#userId")
    public UserDto getUserById(Long userId){
        System.out.println("getuserbyid içerisi");
        UserEntity userEntity = userRepository.getById(userId);
        return UserMapper.INSTANCE.userEntityToUserDto(userEntity);
    }
}

Answer 1

使用 @EnableRedisRepositories 和 UserEntity 進行注釋應該實現可序列化。

@Configuration
@EnableCaching
@EnableRedisRepositories
public class RedisCacheConfiguration {

@Bean
JedisConnectionFactory jedisConnectionFactory() {
    JedisConnectionFactory jedisConFactory
            = new JedisConnectionFactory();
    jedisConFactory.setHostName("localhost");
    jedisConFactory.setPort(6379);
    return jedisConFactory;
}

@Bean
public RedisTemplate<String, Object> redisTemplate() {
    RedisTemplate<String, Object> template =new RedisTemplate<>();
    template.setHashValueSerializer(new StringRedisSerializer());
    template.setConnectionFactory(jedisConnectionFactory());
    return template;
}

}

@RedisHash("UserEntity")
public class UserEntity implements Serializable{
}