如，项目编译之后，文件目录是下图这样的，现在我们要读取log4j.properties文件:
image.png
public static void main(String[] args) {
PropertyConfigurator.configure(GoogleConfigCacheManager.class.getResource("/log4j.properties"));
logger.info("asdada");
}
控制台打印如下:
log4j:WARN No such property [maxBackupIndex] in org.apache.log4j.DailyRollingFileAppender.
log4j:WARN No such property [maxFileSize] in org.apache.log4j.DailyRollingFileAppender.
2020-01-09 11:28:44 -0 [main] INFO - asdada
说明配置加载成功了。
