vue2 txt日志打印以及读取txt文本数据

1.创建log.js在根目录下

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let fs = require('fs') import { parseTime } from "./src/renderer/utils/index" import { MessageBox } from 'element-ui' function writeLog(value){    let logAddress =localStorage.getItem('logAddress')   logAddress = logAddress?.replace(/\\/g, '/')   if(logAddress?.charAt(logAddress.length - 1) !== '\/'){     logAddress += '\/'   }   fs.mkdirSync(logAddress, { recursive: true })    let date = parseTime(new Date(),'{y}-{m}-{d}')+'的日志'   let filePath = `${logAddress}${date}.txt`   let time = parseTime(new Date(),'{h}:{i}:{s}.{t}')   try{     fs.appendFileSync(filePath, `${time}：${value}\n`, err => {       if (err) {         console.info(err)         throw err       }     })   }catch (error) {     MessageBox.alert('日志写入出错，请联系管理员解决', '日志写入异常')     console.error('An error occurred while appending data:', error)   } }   export default writeLog

2.  index.js 时间格式的封装

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export function parseTime(time, cFormat) {   if (arguments.length === 0) {     return null   }   const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'   let date   if (typeof time === 'object') {     date = time   } else {     if ((typeof time === 'string')) {       if ((/^[0-9]+$/.test(time))) {         // support "1548221490638"         time = parseInt(time)       } else {         // support safari         // https://stackoverflow.com/questions/4310953/invalid-date-in-safari         time = time.replace(new RegExp(/-/gm), '/')       }     }       if ((typeof time === 'number') && (time.toString().length === 10)) {       time = time * 1000     }     date = new Date(time)   }   const formatObj = {     y: date.getFullYear(),     m: date.getMonth() + 1,     d: date.getDate(),     h: date.getHours(),     i: date.getMinutes(),     s: date.getSeconds(),     a: date.getDay(),     t:date.getMilliseconds()   }   const time_str = format.replace(/{([ymdhisat])+}/g, (result, key) => {     const value = formatObj[key]     // Note: getDay() returns 0 on Sunday     if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }     if (key === 't') { return value.toString().padStart(3, '0') }     return value.toString().padStart(2, '0')   })   return time_str }

3.使用

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getLogAddress(){        let _this = this       let settingFilePath = process.env.NODE_ENV == 'production'? process.resourcesPath + '/setting/log.txt' : path.resolve(__dirname, "../../setting/log.txt")       const r1 = readline.createInterface({         input: fs.createReadStream(settingFilePath)       })       let arr = []       var i = 1 //txt中的行数       r1.on('line', function(line){         arr.push(line)          i+=1       })         r1.on('close', () => {            if(arr.length && arr[1]){             localStorage.setItem('logAddress',arr[1])         }else{           let address = process.env.NODE_ENV == 'production'? process.resourcesPath + "/logs/" : path.resolve(__dirname, "../../logs/")           localStorage.setItem('logAddress',address)          }        })       },       import writeLog from '../../log'   writeLog('---软件启动---')

4.记得在package.json 添加log的配置，在安装文件里面会看到日志

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"build": {     "extraResources": [       {         "from": "setting/",         "to": "setting/"       },       {         "from": "logs/",         "to": "logs/"       }     ],   },