问题描述
我有一个使用log4j记录消息的Java Web应用程序.该webapp是我编写的jar文件的包装.当我通过Eclipse的内置Jetty运行我的Web应用程序时，我的JAR日志(LOG.info(...)消息)就可以很好地打印出来了.现在，我已经下载了Jetty的独立实例，并从那里运行了我的Web应用程序.使用Jetty附带的默认log4j设置，我无法从我的JAR中看到任何日志.我只看到Jetty日志和Webapp的日志.
I have a java webapp that uses log4j to log messages. This webapp is a wrapper around a jar file that I have written. When I run my webapp through the built-in Jetty from Eclipse, my JAR's logs (LOG.info(...) messages) are printed out just fine. Now, I have downloaded a standalone instance of Jetty and have run my web app from there. With the default log4j settings packaged with Jetty, I am not able to see ANY logs from my JAR. I only see the Jetty logs and the webapp's logs.
我已经在resources文件夹下找到了log4j.properties文件，但是不确定是否需要更改它才能显示应用程序的日志.我以为Jetty可以使用基本的log4j日志功能开箱即用.
I have found the log4j.properties file under the resources folder, but am not sure what I need to change in it to get my app's logs to show. I had thought that Jetty worked out of the box with basic log4j logging.
推荐答案
Jetty不使用log4j.
Jetty doesn't use log4j.
您需要配置${jetty.base}(重要说明:请勿编辑/修改/删除${jetty.home}中的任何内容)，以便先使用slf4j，然后使用log4j.
You'll need to configure your ${jetty.base} (Important Note: do not edit/modify/delete any content in ${jetty.home}) to use slf4j first, log4j second.
$ cd /path/to/myjettybase
$ java -jar /path/to/jetty-dist/start.jar --add-to-start=resources,ext
下一步，去下载slf4j-api.jar，slf4j-log4j##.jar(其中##是要使用的log4j的支持版本)和log4j.jar并将它们放在新的${jetty.base}/lib/ext目录中.
Next, go download slf4j-api.jar, slf4j-log4j##.jar (where ## is the support version of log4j you want to use), and log4j.jar and put them in the new ${jetty.base}/lib/ext directory.
最后，将log4j.xml放在${jetty.base}/resources/目录中.
就是这样，您已经设置了Jetty Distribution以供log4j使用.
That's it, you've setup Jetty Distribution for log4j use.
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