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ConcurrentMap which is similar to
ConcurrentHashMap.ThreadLocalRandom.
DruidAbstractDataSource.getMinEvictableIdleTimeMillis().
null if this map contains no mapping for the
key.
Statement object to execute.
BlockingQueue.take() or timed
poll.
true if there is at least one consumer waiting
to receive an element via BlockingQueue.take() or
timed poll.
true if the given source matches the specified pattern,
false otherwise.
#row2col(ArrayList>, String) 类似,
只不过这里是返回多个表格数据
double value between 0 (inclusive) and the specified value
(exclusive).
#row2col(ArrayList>, String) ,
将第二个参数置为null。
Statement object to execute to the given
number of seconds.
UnsupportedOperationException.
BlockingQueue in which producers may wait for consumers
to receive elements.
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