这个压缩包中是一个简单的多线程实例，在线程执行时，每隔一秒刷新一次当前时间！演示了如何在不影响主进程的情况下如何执行其他长时间等待任务。-This package is a simple multi-threaded example, the thread execution, refresh the current time every second! Demonstrates how the main process does not affect the case of how long to wait to perform other tasks.