如何打印log4j (1.2.17)的属性

<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

private static final Logger logger = Logger.getLogger(YourClassName.class);

logger.info("属性名称：" + System.getProperty("属性名称"));

log4j.rootLogger=INFO, file

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=/path/to/log/file.log
log4j.appender.file.MaxFileSize=10MB
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

PropertyConfigurator.configure("log4j.properties");