springboot获取redis哈希数据写入MySQL

A：可以使用Spring Data Redis来获取Redis哈希数据，并使用Spring Data JPA来将数据写入MySQL。

首先，需要在Spring Boot项目中引入Spring Data Redis和Spring Data JPA依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

然后，在配置文件中配置Redis和MySQL的连接信息：

spring:
  redis:
    host: localhost
    port: 6379
  datasource:
    url: jdbc:mysql://localhost:3306/mydb
    username: root
    password: root

接着，创建一个RedisService类，用于获取Redis中的哈希数据：

@Service
public class RedisService {
    
    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    public Map<Object, Object> getHashData(String key) {
        HashOperations<String, Object, Object> hashOperations = redisTemplate.opsForHash();
        return hashOperations.entries(key);
    }
}

然后，创建一个JpaService类，用于将数据写入MySQL：

@Service
public class JpaService {
    
    @Autowired
    private MyEntityRepository myEntityRepository;

    public void saveData(Map<Object, Object> data) {
        MyEntity entity = new MyEntity();
        entity.setData(data);
        myEntityRepository.save(entity);
    }
}

最后，在Controller中使用RedisService获取数据，并使用JpaService将数据写入MySQL：

@RestController
public class MyController {

    @Autowired
    private RedisService redisService;

    @Autowired
    private JpaService jpaService;

    @GetMapping("/redis-to-mysql")
    public void redisToMysql(String redisKey) {
        Map<Object, Object> data = redisService.getHashData(redisKey);
        jpaService.saveData(data);
    }
}