@SpringBootApplication
@Configuration
@ComponentScan(basePackages = "com.infy.redisDemo")
public class RedisDemoApplication {

    @Bean
    public LettuceConnectionFactory getConnectionFactory(){
        LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory("localhost",6379);
        return lettuceConnectionFactory;
    }

    @Bean
    public RedisTemplate<String,Object> getRedisTemplate(){
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(getConnectionFactory());
        return redisTemplate;
    }

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

}

@Repository
public class UserRepoImpl implements UserRepository {

  private RedisTemplate<String, Object> redisTemplate;

  private HashOperations hashOperations;
  public final String key = "USER";

  public UserRepoImpl(RedisTemplate redisTemplate,
      HashOperations hashOperations) {
    this.redisTemplate = redisTemplate;
    this.hashOperations = redisTemplate.opsForHash();
  }

  @Override
  public void save(User user) {
    hashOperations.put(key,user.getId(),user);
  }

  @Override
  public void update(User user) {
    hashOperations.put(key,user.getId(),user);
  }

  @Override
  public Map findAll() {
    return hashOperations.entries(key);
  }
}
public interface UserRepository {

  void save(User user);
  void update(User user);
  Map findAll();
}

@RestController
@RequestMapping("/rest/user")
public class RedisController {

  private UserRepository userRepository;

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

  @GetMapping("/add/{id}/{name}")
  public User add(@PathVariable String id,@PathVariable String name){
    userRepository.save(new User(name,id,25000));
    return userRepository.findById(id);
  }
}

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'redisController' defined in file [redisDemoRedisController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userRepoImpl' defined in file [redisDemorepositoryUserRepoImpl.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.data.redis.core.HashOperations<?, ?, ?>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}