Question

在执行应用程序时，它会在Eclipse IDE的控制台中显示日志。但它没有将任何数据写入外部日志文件

通过添加log4j日志创建了简单的应用程序。

代码

import org.apache.log4j.Logger;

public class HelloExample{
    final static Logger logger = Logger.getLogger(HelloExample.class);

    public static void main(String[] args) {

        HelloExample obj = new HelloExample();
        obj.runMe("Milinda");

    }

    private void runMe(String parameter){

        if(logger.isDebugEnabled()){
            logger.debug("This is debug : " + parameter);
        }

        if(logger.isInfoEnabled()){
            logger.info("This is info : " + parameter);
        }

        logger.warn("This is warn : " + parameter);
        logger.error("This is error : " + parameter);
        logger.fatal("This is fatal : " + parameter);

    }

}

我的Log4J Porperty文件如下所示

log4j.rootLogger=ERROR, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\Projects\\HelloLogging\\test.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

Answer 1

您需要将文件追加器添加到RootLogger。试试这个......

log4j.rootLogger=ERROR, stdout, file <-- added file here

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\Projects\\HelloLogging\\test.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

Log4j终端日志正在执行但没有输出文件

1 个答案: