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log4js 日志管理

使用方法

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var log4js = require('log4js');
var logger = log4js.getLogger();
logger.level = 'debug';
logger.debug("Some debug messages");
log4js.configure('./config/log4js.json');

log4js.json配置方法

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{
  "appenders": {
    "access": {
      "type": "dateFile",
      "filename": "log/access.log",
      "pattern": "-yyyy-MM-dd"
    },
    "rule-console": {
      "type": "console"
    },
    "rule-file": {
      "type": "dateFile",
      "filename": "log/server-",
      "encoding": "utf-8",
      "maxLogSize": 10000000,
      "numBackups": 3,
      "pattern": "yyyy-MM-dd.log",
      "alwaysIncludePattern": true
    },
    "rule-error": {
      "type": "dateFile",
      "filename": "log/error-",
      "encoding": "utf-8",
      "maxLogSize": 1000000,
      "numBackups": 3,
      "pattern": "yyyy-MM-dd.log",
      "alwaysIncludePattern": true
    }
  },
  "categories": {
    "default": {
      "appenders": [
        "rule-console",
        "rule-file",
        "rule-error"
      ],
      "level": "debug"
    },
    "http": {
      "appenders": [
        "access"
      ],
      "level": "info"
    }
  }
}
``` 
### 直接使用方法

log4js.configure({

appenders: {

    ruleConsole: {type: 'console'},

    ruleFile: {

        type: 'dateFile',

        filename: 'logs/server-',

        pattern: 'yyyy-MM-dd.log',

        maxLogSize: 10 * 1000 * 1000,

        numBackups: 3,

        alwaysIncludePattern: true

    }

},

categories: {

    default: {appenders: ['ruleConsole', 'ruleFile'], level: 'info'}

}

});

```