这篇博客记录使用`QtSingleApplication `的一个简单例子，`QtSingleApplication` 是在QtCreator的源码中遇到的，所以写一个例子来说明该类的简单使用。

代理模式+实际应用训练

安卓大作业公交查询系统

SpringBoot配置文件

application.properties最全配置附加备注

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VBnet源码，C#可用。分线程窗体，主线程卡死任然报告方法的进度值到UI窗体上面

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