java - Redis 问题考虑在您的配置中定义类型为 'org.springframework.data.redis.core.HashOperations' 的 bean

Question

我正在尝试通过 java 连接到 Redis，我有以下配置，

@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);
    }

}

我的 repo 类:

@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();
}

我的 Controller 类如下，

@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);
    }
}

当我运行应用程序时出现以下错误，

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'redisController' defined in file [redisDemo\RedisController.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 [redisDemo\repository\UserRepoImpl.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: {}

程序有什么问题？有什么建议让它发挥作用吗？我需要使用 jedisconnectionFactory 吗？我正在使用 Intellij，我在 Windows 上的 redis 版本是 3.2，spring 是 2.1.6。

Answer 1

您不需要将 HashOperations hashOperations 作为参数传递给 UserRepoImpl 构造函数。相反，您可以从构造函数中删除此参数。

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