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};
 }
});