先检查给定的目录是否存在,如果不存在新建一个;接着根据前缀,时间,后缀设定文件名;根据文件名填充writer对象。
private void close() {
if (writer == null)
return;
writer.flush();
writer.close();
writer = null;
date = "";
}
FileLogger中的date代表的就是当前的时间,当然关闭后为空。
应用程序
Bootstrap类
...
System.setProperty("catalina.base", System.getProperty("user.dir"));
FileLogger logger = new FileLogger();
logger.setPrefix("FileLog_");
logger.setSuffix(".txt");
logger.setTimestamp(true);
logger.setDirectory("webroot");
context.setLogger(logger);
....
SimpleContext类
public synchronized void start() throws LifecycleException {
log("starting Context");
........
lifecycle.fireLifecycleEvent(AFTER_START_EVENT, null);
log("Context started");
}
private void log(String message) {
Logger logger = this.getLogger();
if (logger!=null)
logger.log(message);
}
运行后在项目的webroot目录下就可以看到FileLog_2014-10-20.txt文件;
2014-10-20 14:34:21 HttpConnector Opening server socket on all host IP addresses
2014-10-20 14:34:22 HttpConnector[8080] Starting background thread
2014-10-20 14:34:22 HttpProcessor[8080][0] Starting background thread
2014-10-20 14:34:22 HttpProcessor[8080][1] Starting background thread
2014-10-20 14:34:22 HttpProcessor[8080][2] Starting background thread
2014-10-20 14:34:22 HttpProcessor[8080][3] Starting background thread
2014-10-20 14:34:22 HttpProcessor[8080][4] Starting background thread
2014-10-20 14:34:22 starting Context
2014-10-20 14:34:22 Context started