Log4J打印空行到logfile

Logger logger = Logger.getLogger(Log4JTest.class);
logger.info("");

import org.apache.log4j.FileAppender;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;

public class Log4JTest {
    public static void main(String[] args) {
        Logger logger = Logger.getLogger(Log4JTest.class);

        // 创建PatternLayout对象，自定义日志输出格式
        PatternLayout layout = new PatternLayout("%m%n");

        // 创建FileAppender对象，指定日志输出文件路径和名称
        FileAppender appender = new FileAppender(layout, "logfile.log", false);

        // 将FileAppender添加到Logger对象中
        logger.addAppender(appender);

        // 输出空行到日志文件
        logger.info("");
    }
}