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51CTO
2 天
记一个 ConcurrentHashMap 使用不当导致的并发事故-51CTO.COM
但是如果对于这些映射容器的键使用不当就可能导致唯一键值对多次插入的情况,所以本文将基于笔者前段时间遇到的经典的例子为切入点,深入剖析该问题的原因和解决思路。 二、详解ConcurrentHashMap并发重复插入问题 1. 需求说明 我们现在有这样一个需求,大体是通过数据库获取要处理的任务并 ...
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