Question

Is there a Logger that will easily log my stacktrace (what I get with ex.printStackTrace())? I ve searched the log4j docs and found nothing about logging the stacktrace.

我可以自己做这件事。

StringWriter sw = new StringWriter();
ex.printStackTrace(new PrintWriter(sw));
String stacktrace = sw.toString();
logger.error(stacktrace);

但我不想在各处复制此代码。

If log4j won t do this for me is there another logging package that will log the stacktrace for me?

谢谢。

Answer 1

使用 log4j 可以完成此操作:

logger.error("An error occurred", exception);

第一个参数是要显示的消息，第二个参数是被记录堆栈跟踪的异常（可抛出的）。

另一个选择是commons-logging，这里也是一样的：

log.error("Message", exception);

利用java.util.logging可以进行此操作：

logger.log(Level.SEVERE, "Message", exception);

Answer 2

在java.util.logging中，您可以像这样使用自定义日志格式化程序初始化记录器：

private Logger initTextLogger() throws SecurityException, IOException {
        Logger logger = Logger.getLogger(YourClass.class.getName());
        FileHandler fileHandler = new FileHandler(logFilePath, false);
        SimpleFormatter logFormatter = new SimpleFormatter() {
            @Override
            public String format(LogRecord record) {
            String stacktrace = "";
            Throwable t = record.getThrown();
            if(t!=null){
                StringWriter sw = new StringWriter();
                t.printStackTrace(new PrintWriter(sw));
                stacktrace = sw.toString();
            }               
            return record.getLevel() + ": " + record.getMessage() + "
"
                    + stacktrace;
        }
        };
        fileHandler.setFormatter(logFormatter);
        logger.addHandler(fileHandler);

        return logger;
    }

友情链接