如何将 java.util.log 转发到 apache commons 日志记录？

Question

我们使用 apache commons logging 进行日志记录。但是现在我们正在使用一个使用 java.util 日志记录的 OSS 库。

如何让 lib 调用的 java.util 日志语句显示在我们的 apache commons log4j 日志文件中？

Answer 1

Apache Commons 常见问题解答中对此进行了介绍Can calls to java.util.logging be redirected via commons-logging?。

Yes. The java.util.logging classes present in java since 1.4 are both an API and a (primitive) logging implementation. It is possible to install an "implementation" that redirects messages back to commons-logging, which will then in turn direct the calls to the appropriate concrete logging library that commons-logging is sending other messages to.

Alternatively, have your java.util.logging "implementation" send messages directly to the same implementation that commons-logging is bound to. This will be faster - although if you change your commons-logging configuration to use a different logging library then the java.util.logging implementation would need to be changed too.

See here for details:

http://wiki.apache.org/myfaces/Trinidad_and_Common_Logging

他们所做的只是创建一个 java.util.logging.Hander 以使 JUL 的输出适应公共日志记录。在示例中，它们可能应该处理其他命名日志级别之间的日志级别 int 值，以便您在 JUL 中处理任何自定义日志级别。一个示例补丁是：

@Override
public void publish(LogRecord record) {
    Log log = getLog(record.getLoggerName());
    String message = record.getMessage();
    Throwable exception = record.getThrown();
    int level = record.getLevel().intValue();
    if (level >= Level.SEVERE.intValue()) {
        log.error(message, exception);
    } else if (level >= Level.WARNING.intValue()) {
        log.warn(message, exception);
    } else if (level >= Level.INFO.intValue()) {
        log.info(message, exception);
    } else if (level >= Level.CONFIG.intValue()) {
        log.debug(message, exception);
    } else {
        log.trace(message, exception);
    }
}

如何将 java.util.log 转发到 apache commons 日志记录？

How to forward java.util.log to apache commons logging?

java.util.logging

apache-commons-logging