1. Timestamp can only be used until 2038, and Timestamp is not applicable after 2038 ( new time types may be introduced )
2. Recursive calls are likely to cause memory leaks (if there is no parent-child relationship, it is not recommended), you can use while instead Or for loop
3. The internal network cannot access the external network server and cannot communicate with each other
Java development cold knowledge
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Origin blog.csdn.net/qq_33551131/article/details/116942388
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