创建项目时点击运行弹出来Error running '[org.apache.maven.plugins:maven-archetype-plugin:RELEASE:generate]': Cannot start process, the working directory 'C:\Users\AppData\Local\Temp\archetypetmp' does not exist

后来连接MySQL ，连不上，IDEA 报错一大堆，几天了也不知道怎么办，

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
       at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:688)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
       at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373)
       at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
       at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
       at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1594)
       at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
       at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
       at java.lang.Thread.run(Thread.java:748)

关于安卓录制视频时切换摄像头

哈咯哈咯嘻

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