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

server:
 port: 10900

spring:
 profiles:
  active: dev
 redis:
  host: localhost #redis服務器地址
  port: 6379 #redis端口
  password: 1234 #redis密碼
  timeout: 60000 #連接超時時間
  database: 0 #數(shù)據(jù)庫索引，默認為0

@Configuration
@EnableCaching
public class CacheConfig {

  @Bean
  public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
    RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(connectionFactory);

    // 使用Jackson2JsonRedisSerializer來序列化和反序列化redis的value值（默認使用JDK的序列化方式）
    Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);

    ObjectMapper mapper = new ObjectMapper();
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    serializer.setObjectMapper(mapper);

    redisTemplate.setValueSerializer(serializer);
    // 使用StringRedisSerializer來序列化和反序列化redis的key值
    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.afterPropertiesSet();
    return redisTemplate;
  }
}

@RestController
@RequestMapping("cache")
public class CacheApi {

  @Autowired
  private CacheService cacheService;

  @GetMapping("get")
  public User get(@RequestParam int id){
    return cacheService.get(id);
  }

  @PostMapping("set")
  public User set(@RequestParam int id, @RequestParam String code, @RequestParam String name){
    User u = new User(code, name);
    return cacheService.set(id, u);
  }

  @DeleteMapping("del")
  public void del(@RequestParam int id){
    cacheService.del(id);
  }
  
}

@Slf4j
@Service
public class CacheService {

  private Map<Integer, User> dataMap = new HashMap <Integer, User>(){
    {
      for (int i = 1; i < 100 ; i++) {
        User u = new User("code" + i, "name" + i);
        put(i, u);
      }
    }
   };

  // 獲取數(shù)據(jù)
  @Cacheable(value = "cache", key = "'user:' + #id")
  public User get(int id){
    log.info("通過id{}查詢獲取", id);
    return dataMap.get(id);
  }

  // 更新數(shù)據(jù)
  @CachePut(value = "cache", key = "'user:' + #id")
  public User set(int id, User u){
    log.info("更新id{}數(shù)據(jù)", id);
    dataMap.put(id, u);
    return u;
   }

  //刪除數(shù)據(jù)
  @CacheEvict(value = "cache", key = "'user:' + #id")
  public void del(int id){
    log.info("刪除id{}數(shù)據(jù)", id);
    dataMap.remove(id);
  }
  
}