log4js 是 nodejs 出色的日志处理框架之一, 本文将帮助你快速集成到你的应用
安装
npm install --save log4js@6.1.0
// or
npm i -S log4js
log4js 配置
注: 此配置基于
log4js v6.1.0
// file: logger.json
{
"appenders": {
"out": {
"type": "console"
},
"default": {
"type": "dateFile",
"filename": "logs/default.log",
"pattern": "yyyy-MM-dd",
"compress": true,
"alwaysIncludePattern": true,
"daysToKeep": 15,
"keepFileExt": true
},
"error": {
"type": "dateFile",
"filename": "logs/error.log",
"pattern": "yyyy-MM-dd",
"compress": true,
"alwaysIncludePattern": true,
"daysToKeep": 15,
"keepFileExt": true
},
"maxInfo": {
"type": "logLevelFilter",
"appender": "default",
"level": "debug",
"maxLevel": "info"
},
"minError": {
"type": "logLevelFilter",
"appender": "error",
"level": "error"
}
},
"categories": {
"default": {
"appenders": [
"out",
"maxInfo",
"minError"
],
"level": "all",
"enableCallStack": true
}
},
"replaceConsole": true
}
加载配置
// file: app.js
const log4js = require('log4js');
const config = require('./logger.json');
log4js.configure(config);
const logger = log4js.getLogger('custom-category');
logger.info('info');
logger.debug('debug');
logger.warn('warn');
logger.error('error');
评论