log4j 自动生成 appender

一般log4j的配置是通过log4j.properties或xml进行配置，但在实际开发中，遇到有时候需要在代码中自动生成log appender，主要代码如下：

 

写道

/**
* 根据 partnerCode 获取Log Handler
*
* @param parnterCode parnterCode
* @return Log
*/
private Logger _getLogger(String parnterCode) {
Logger logger = (Logger) this.logHandlerMap.get(parnterCode);

if (logger == null) {
try {
// Category logger = Category.getInstance("com.viewtoo.cooperate.service.CooperateLog." + partners[i]);
logger = Logger.getLogger("com.viewtoo.cooperate.logservice." + parnterCode);

Layout layout = new PatternLayout("%d{yyyy-MM-dd HH:mm:ss}%m%n");
String filePath = this.cooperateDrLogFileDir + "/cooperate_dr_" + parnterCode + ".log";
String datePattern = ".yyyy-MM-dd";

DailyRollingFileAppender appender = new DailyRollingFileAppender(layout, filePath, datePattern);
logger.setLevel(Level.INFO);
logger.addAppender(appender);

this.logHandlerMap.put(parnterCode, logger);

} catch (IOException e) {
e.printStackTrace();
}
}

return logger;
}

/**
* 记日志到文件，以后再解析文件入DB，采用log4j技术
*
* @param drLog drLog
*/
private void _log2File(CooperateDr drLog) {
Logger logger = this._getLogger(drLog.getPartnercode());
logger.info(drLog.toString());
}