一、创建log4.js文件，保存日志到log文件，并在控制台输出，如果不控制台输出，把删除红色的代码
const log4js = require('log4js'),
path = require('path')
log4js.configure({
replaceConsole: true,
appenders: {
stdout: {//控制台输出
type: 'console'
},
trace: {
type: 'dateFile',
filename: 'logs/tracelog/',
pattern: 'trace-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
debug: {
type: 'dateFile',
filename: 'logs/debuglog/',
pattern: 'debug-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
info: {
type: 'dateFile',
filename: 'logs/infolog/',
pattern: 'info-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
warn: {
type: 'dateFile',
filename: 'logs/warnlog/',
pattern: 'warn-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
error: {
type: 'dateFile',
filename: 'logs/errorlog/',
pattern: 'error-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
fatal: {
type: 'dateFile',
filename: 'logs/fatallog/',
pattern: 'fatal-yyyy-MM-dd.log',
alwaysIncludePattern: true
},
},
categories: {
trace: { appenders: ['stdout', 'trace'], level: 'trace' },//appenders:采用的appender,取appenders项,level:设置级别
debug: { appenders: ['stdout', 'debug'], level: 'debug' },
default: { appenders: ['stdout', 'info'], level: 'info' },
warn: { appenders: ['stdout', 'warn'], level: 'warn' },
error: { appenders: ['stdout', 'error'], level: 'error' },
fatal: { appenders: ['stdout', 'fatal'], level: 'fatal' },
}
})
exports.getLogger = function (name) {//name取categories项
return log4js.getLogger(name || 'info')
}
exports.useLogger = function (app, logger) {//用来与express结合
app.use(log4js.connectLogger(logger || log4js.getLogger('info'), {
format: '[:remote-addr :method :url :status :response-timems][:referrer HTTP/:http-version :user-agent]'//自定义输出格式
}))
}二、引用log4.js调用
const log4js = require("../log4js/log4Builder"),
logger = log4js.getLogger("info")
logger.info("现在时间：",new Date().toLocaleString())
logger.trace("现在时间：",new Date().toLocaleString())
logger.debug("现在时间：",new Date().toLocaleString())
logger.info("现在时间：",new Date().toLocaleString())
logger.warn("现在时间：",new Date().toLocaleString())
logger.error("现在时间：",new Date().toLocaleString())
logger.fatal("现在时间：",new Date().toLocaleString())