「Java」SLF4J(Simple Logging Facade For Java)でログを出力する設定サンプル

2020年4月23日

1.log4j.propertiesの定義サンプル
log4j.rootLogger=debug, C

log4j.appender.A=org.apache.log4j.ConsoleAppender
log4j.appender.A.layout=org.apache.log4j.PatternLayout
log4j.appender.A.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n

log4j.appender.B=org.apache.log4j.FileAppender
log4j.appender.B.File=D:\\cft.log
log4j.appender.B.layout=org.apache.log4j.SimpleLayout

log4j.appender.C=org.apache.log4j.RollingFileAppender
log4j.appender.C.File=D:\\cftlog.html
log4j.appender.C.MaxFileSize=1000KB
log4j.appender.C.MaxBackupIndex=10
log4j.appender.C.layout=org.apache.log4j.HTMLLayout
log4j.appender.C.encoding=gbk

log4j.appender.D=org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File=D:\\cft.log
log4j.appender.D.layout=org.apache.log4j.TTCCLayout

2.Javaコード

package com.arkgame.study.slf4jdemo;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Slf4jDemo {
    private static final Logger LOGGER = LoggerFactory.getLogger(Slf4jDemo.class);

    public static void main(String[] args) throws IOException, InterruptedException {
        LOGGER.debug("start thread");
        Thread.sleep(1 * 2000);

        methodAa();
    }

    public static void methodAa() {
        LOGGER.debug("called methodAa method");
    }

}