日志文件为空(log4j) [英] Log file is empty (log4j)

问题描述

日志信息显示在控制台上，而不显示在日志文件上(已创建文件，但未添加任何内容).怎么了?

Log information is shown on console but not on the log file (the file is created but no content is added). What's wrong?

来源:

package mytest;

import java.util.logging.Level; import java.util.logging.Logger;

import org.apache.log4j.PropertyConfigurator;

public class Main {     
    public static void main(String[] args) {        
        Logger log  = Logger.getLogger(Main.class.getName());
        log.setLevel(Level.ALL);        
        log.info("A line)");
        PropertyConfigurator.configure("log.properties");       
        log.info("Another line");   
    } 
}

log.properties文件:

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log

log4j.appender.R.MaxFileSize=100KB

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

推荐答案

您正在混合使用java.util.logging和log4j.

You are mix things, java.util.logging and log4j.

您可以尝试将commonsLoggin与log4j一起使用

You can try to use commonsLoggin with log4j

http://commons.apache.org/logging/guide.html# Quick％20Start

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
...
Log log = LogFactory.getLog(getClass());

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