Question

我正在使用配置了log4j.xml的log4j（通过slf4j）。我想知道如何禁用log4j显示的消息。例如，如果无法创建log4j.xml中指定的日志文件，则log4j会在控制台上显示以下消息：

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: \LogFile.log (Accesso negato)
  at java.io.FileOutputStream.open(Native Method)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:212)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:136)
  at org.apache.log4j.FileAppender.setFile(FileAppender.java:294)
  at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:207)
  at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165)
  at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307)
  at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:295)
  at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:176)
  at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:191)
  at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:523)
  at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:492)
  at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:1006)
  at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:872)
  at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:778)
  at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
  at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
  at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:66)
  at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270)
  at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)

我不希望用户看到完整的异常堆栈。提前致谢

Answer 1

解决方案是编写com.myapp.SilentErrorHandler来实现org.apache.log4j.spi.ErrorHandler，但不执行任何操作。

log4j.xml中的配置为：

 <appender name="file" class="org.apache.log4j.RollingFileAppender">
   <errorHandler class="com.myapp.SilentErrorHandler" />
   <param name="File" value="\LogFile.log"/>
   <layout class="org.apache.log4j.PatternLayout">
   ...
   </layout>
 </appender>

请注意，默默地忽略错误通常是一件坏事。您可以考虑使用FallbackErrorHandler，如果主要appender失败，则允许指定回退追加器。

log4j如何禁用内部消息？

1 个答案: