如何用一个log4j配置文件创建两个单独的日志文件？

  • Z时代
  • 2024-01-10
  • 分类：问答

我不知道如何配置我的log4j，以便我的debugLog和reportLog彼此分开（不是附加的）。为什么在以下配置中，reportsLog始终为空？

log4j.rootLogger=TRACE, stdout, debugLog
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n
log4j.appender.debugLog=org.apache.log4j.FileAppender
log4j.appender.debugLog.File=logs/debug.log
log4j.appender.debugLog.layout=org.apache.log4j.PatternLayout
log4j.appender.debugLog.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n
log4j.reportsLog=DEBUG,reportsLog
log4j.appender.reportsLog=org.apache.log4j.FileAppender
log4j.appender.reportsLog.File=logs/reports.log
log4j.appender.reportsLog.layout=org.apache.log4j.PatternLayout
log4j.appender.reportsLog.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n

这是我的Java代码：

package test;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
public class HelloLogger {
    static final Logger debugLog = Logger.getLogger("debugLog");
    static final Logger resultLog = Logger.getLogger("reportsLog");
    public static void main(String[] args) {
        PropertyConfigurator.configure("log4j.properties");
        debugLog.debug("Hello debugLog message");   
        resultLog.debug("Hello reportsLog message");
    }   
}

回答：

尝试以下配置：

log4j.rootLogger=TRACE, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n
log4j.appender.debugLog=org.apache.log4j.FileAppender
log4j.appender.debugLog.File=logs/debug.log
log4j.appender.debugLog.layout=org.apache.log4j.PatternLayout
log4j.appender.debugLog.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n
log4j.appender.reportsLog=org.apache.log4j.FileAppender
log4j.appender.reportsLog.File=logs/reports.log
log4j.appender.reportsLog.layout=org.apache.log4j.PatternLayout
log4j.appender.reportsLog.layout.ConversionPattern=%d [%24F:%t:%L] - %m%n
log4j.category.debugLogger=TRACE, debugLog
log4j.additivity.debugLogger=false
log4j.category.reportsLogger=DEBUG, reportsLog
log4j.additivity.reportsLogger=false

然后相应地用Java代码配置记录器：

static final Logger debugLog = Logger.getLogger("debugLogger");
static final Logger resultLog = Logger.getLogger("reportsLogger");

你要输出到stdout吗？如果不是，请将第一行更改log4j.properties为：

log4j.rootLogger=OFF

并摆脱stdout界限。

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