Express 错误：连接丢失：服务器关闭了连接。 大佬们如何解决？-灵析社区

**Express 错误：连接丢失：服务器关闭了连接。 大佬们如何解决** var express = require('express'); var app = express(); const cors = require('cors'); app.use(cors()); app.use(express.static('./public')) const bodyParser = require('body-parser') app.use(bodyParser.urlencoded({ extended: true })); const router = require('./routes/api.js'); app.use('/api', router); var server = app.listen(8081, function () { var host = server.address().address var port = server.address().port console.log("应用实例，访问地址为 [http://localhost:808](https://link.segmentfault.com/?enc=NtPyTUU2jK9XJbKvIGwJkg%3D%3D.WOS2lRO52fEwloECtNesSQ5nDoNytgCK05MbPGYNftk%3D)1", host, port) }) // 报错信息 node:events:496 throw er; // Unhandled 'error' event Error: Connection lost: The server closed the connection. at Protocol.end (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\protocol\Protocol.js:112:13) at Socket. (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\Connection.js:94:28) at Socket. (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\Connection.js:526:10) at Socket.emit (node:events:530:35) at endReadableNT (node:internal/streams/readable:1696:12) at process.processTicksAndRejections (node:internal/process/task_queues:82:21) Emitted 'error' event on Connection instance at: at Connection._handleProtocolError (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\Connection.js:423:8) at Protocol.emit (node:events:518:28) at Protocol._delegateError (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\protocol\Protocol.js:398:10) at Protocol.end (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\protocol\Protocol.js:116:8) at Socket. (C:\Users\Administrator\Desktop\books_serve\node_modules\mysql\lib\Connection.js:94:28) [... lines matching original stack trace ...] at process.processTicksAndRejections (node:internal/process/task_queues:82:21) { fatal: true, code: 'PROTOCOL_CONNECTION_LOST' } Node.js v20.11.0 [nodemon] app crashed - waiting for file changes before starting... [nodemon] restarting due to changes... [nodemon] starting `node .\app.js` 各位大佬如何解决