text: log4js.configure({
  	"appenders": [{
  		"type": "console"
  	}, {
  		"type": "file",
  		"filename": "logs/app1.log",
  		"maxLogSize": 204800,
  		"backups": 10,
  		"category": "app1"
  	}, {
  		"type": "file",
  		"filename": "logs/app2.log",
  		"maxLogSize": 204800,
  		"backups": 10,
  		"category": "app2"
  	}, {
  		"type": "file",
  		"filename": "logs/app3.log",
  		"maxLogSize": 204800,
  		"backups": 10,
  		"category": "app3"
  	}],
  	"replaceConsole": true,
  	"levels": {
  		"app1": "ALL", //等级可以设置ALL,AUTO,INFO,WARN,ERROR
  		"app2": "ALL",
  		"app3": "ALL"
  	}
  });
  