在java中使用log4j，日志文件没有被更新/创建

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问题描述

我正在尝试使用Java中的log4j捕获日志.可执行文件是在Linux Envirnment中，它显示了日志记录消息，但是，它没有写入日志文件.我正在使用log4j.xml，这就是我到目前为止的

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="LocalFileAppender" class="org.apache.log4j.RollingFileAppender">
    <param name="File"   value="logs/error.log" />
    <param name="Append" value="true" />
    <param name="MaxFileSize" value="500KB" />
    <param name="maxBackupIndex" value="1" />
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %-5p [%c] - %m%n"/>
      </layout>
  </appender>

  <appender name="ConsoleAppender" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.SimpleLayout"/>
  </appender>

  <root>
    <priority value ="Debug" />
    <appender-ref ref="console" /> 
  </root>
</log4j:configuration>

我不清楚Java程序如何知道XML文件的位置.我认为这是问题所在.而且，这就是我在代码中设置的方式

log = Logger.getLogger(MyClass.class);

BasicConfigurator.configure();

任何帮助都会对其进行.谢谢.

其他推荐答案

1)在Windows Env上，即使所有参数都是正确的，也需要确保文件的路径是绝对的，并且由"/"而不是正常的" \"分开.

在确定路径时，" \"被忽略，因此成为一个大名.

因此，看来没有写任何东西，实际上是因为它被写在另一个地方. :)

2)和Eclipse，以尝试以" matt b"的上一个答案建议的选项.

转到运行>运行配置>参数[TAB]，然后将VM参数>应用和运行中的值放入. 显然您的文件应该具有主.

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问题描述

I am trying to capture the logs using log4j in Java. The executeable is in linux envirnment and it displays the logging message, however, it is not writing into the log file. I am using log4j.xml and this is what I have so far

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="LocalFileAppender" class="org.apache.log4j.RollingFileAppender">
    <param name="File"   value="logs/error.log" />
    <param name="Append" value="true" />
    <param name="MaxFileSize" value="500KB" />
    <param name="maxBackupIndex" value="1" />
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %-5p [%c] - %m%n"/>
      </layout>
  </appender>

  <appender name="ConsoleAppender" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.SimpleLayout"/>
  </appender>

  <root>
    <priority value ="Debug" />
    <appender-ref ref="console" /> 
  </root>
</log4j:configuration>

I am not clear how the java program knows where the xml file is located. I think that is the problem. And, this is how I setup in the code,

log = Logger.getLogger(MyClass.class);

BasicConfigurator.configure();

Any help would be appreicate it. Thanks.

其他推荐答案

1) On the Windows env , Even if all the parameters are right , need to make sure that the path to the file is absolute and that is separated by " / " rather than the normal "\" .

While deciding on the path , "\" are ignored and so it becomes one large name .

And hence it might seem that nothing's been written , it actually is that it's getting written at a different place . :)

2) And on Eclipse , to try out the option that the previous answer by "matt B" suggests..

Go to RUN > RUN Configurations > Arguments [tab ] and put in the value in the VM arguments > Apply and RUN . Obviously your file should have main..

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