使用koa-log4管理nodeJs日志笔记的使用方法

├── back-end│ ├── logs 所有产生的日志文件存放在此目录下│ ├── db.js 使用Sequelize连接数据库│ ├── logger.js 日志的配置│ ├── server.js 后端提供的所有接口

const path = require('path');const log4js = require('koa-log4');log4js.configure({ appenders: {  access: {   type: 'dateFile',   pattern: '-yyyy-MM-dd.log', //生成文件的规则   filename: path.join('back-end/logs/', 'access.log') //生成文件名  },  application: {   type: 'dateFile',   pattern: '-yyyy-MM-dd.log',   filename: path.join('back-end/logs/', 'application.log')  },  out: {   type: 'console'  } }, categories: {  default: { appenders: [ 'out' ], level: 'info' },  access: { appenders: [ 'access' ], level: 'info' },  application: { appenders: [ 'application' ], level: 'WARN'} }});exports.accessLogger = () => log4js.koaLogger(log4js.getLogger('access')); //记录所有访问级别的日志exports.logger = log4js.getLogger('application'); //记录所有应用级别的日志

const Koa = require('koa');const KoaRouter = require('koa-router');const app = new Koa();const router = new KoaRouter();const { logger, accessLogger } = require('./logger');const router = new KoaRouter();app.use(accessLogger());

app.on('error', err => { logger.error(err);});

router.post('/test',async (ctx, next)=>{ //处理代码 }catch(e){  logger.error(e);  ctx.body = {status:-1, message:e.message}; }});