創建log.js
var log4js = require('log4js');
log4js.configure({
appenders: [
{
type: 'console',
category: "console"
}, //控制檯輸出
{
type: "dateFile",
filename: 'logs/log.log',
pattern: "_yyyy-MM-dd",
alwaysIncludePattern: false,
category: 'dateFileLog'
}//日期文件格式
],
replaceConsole: true, //替換console.log
levels:{
dateFileLog: 'INFO'
}
});
var dateFileLog = log4js.getLogger('dateFileLog');
exports.logger = dateFileLog;
exports.use = function(app) {
//頁面請求日誌,用auto的話,默認級別是WARN
//app.use(log4js.connectLogger(dateFileLog, {level:'auto', format:':method :url'}));
app.use(log4js.connectLogger(dateFileLog, {level:'debug', format:':method :url'}));
}
在app.js中添加以下代碼,由於加載順序的原因,放在其他app.use前面
var log = require('./log');
log.use(app);
功能中記錄日誌,require路徑根據自己項目修改:
var logger = require('../log').logger;
logger.info("this is log");
需要注意的是,如果日誌使用的是日期(如本例子),即一天一個文件,測試的話,直接修改日期測試,是不會生產新的日期日誌的,必須把時間調爲晚上23點59分,然後等着過整點,這時候可以測試是否會生成新的文件,官方例子說明如下(https://github.com/nomiddlename/log4js-node/wiki/Date%20rolling%20file%20appender):
Then initial logging would create a file called "blah.log".At midnight, the current "blah.log" file would be renamed
to "blah.log-2012-09-26" (for example), and a new "blah.log" file created.