所有方法实例方法抽象方法
修饰符和类型	方法	说明
`void`	`close()`
`void`	`commitAsync()`
`void`	`commitAsync(OffsetCommitCallback callback)`
`void`	`commitSync()`
`ConsumerRecords<V>`	`poll(Duration timeout)`
`void`	`subscribe(Collection<String> topics)`
`Set<String>`	`subscription()`
`void`	`unsubscribe()`

void subscribe(Collection<String> topics)
        throws SQLException

void unsubscribe()
          throws SQLException

Set<String> subscription()
                  throws SQLException

ConsumerRecords<V> poll(Duration timeout)
                 throws SQLException

void commitAsync(OffsetCommitCallback callback)

void commitSync()
         throws SQLException

接口 TConsumer<V>