Nodejs 报错 throw er; // Unhandled 'error' event 解决办法

node:events:504
[0]       throw er; // Unhandled 'error' event
[0]       ^
[0]
[0] Error: listen EACCES: permission denied 0.0.0.0:8080
[0]     at Server.setupListenHandle [as _listen2] (node:net:1313:21)
[0]     at listenInCluster (node:net:1378:12)
[0]     at doListen (node:net:1516:7)
[0]     at processTicksAndRejections (node:internal/process/task_queues:84:21)
[0] Emitted 'error' event on Server instance at:
[0]     at emitErrorNT (node:net:1357:8)
[0]     at processTicksAndRejections (node:internal/process/task_queues:83:21) {
[0]   code: 'EACCES',
[0]   errno: -4092,
[0]   syscall: 'listen',
[0]   address: '0.0.0.0',
[0]   port: 3100
[0] }

错误原因：

端口号被占用。

解决方法：

修改端口号，或者干掉端口号，重新启动项目

干掉端口号方法：

1.进入cmd命令窗口，写netstat -ano|findstr "8080"

2.taskkill -PID 13512 -F