[問題記錄]log4j使用記錄

轉自：https://blog.csdn.net/yeweiouyang/article/details/53645458

步驟一：maven配置依賴

https://mvnrepository.com/artifact/log4j/log4j/1.2.16

步驟二：IDEA加入log4j.properties文件

File->Project Structure

將log4j.properties文件放入resources文件夾中

idea_setting_2

步驟三：配置log4j.properties文件

• 輸出到控制檯
• 輸出到../logs/task_node.log文件（每天生成一個新文件，舊文件自動被重命名爲task_node.log_xxxx-xx-xx）

log4j.rootLogger=DEBUG,console,FILE
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.threshold=INFO
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%5p] - %c -%F(%L) -%m%n 
#log4j.appender.FILE=org.apache.log4j.RollingFileAppender
#log4j.appender.FILE.Append=true 
#log4j.appender.FILE.File=../logs/TaskNode.log 
#log4j.appender.FILE.Threshold=INFO
#log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
#log4j.appender.FILE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%5p] - %c -%F(%L) -%m%n
#log4j.appender.FILE.MaxFileSize=10MB 
# Direct log messages to a log file 
# Define the file appender log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender 
# Set the name of the file log4j.appender.FILE.File=../logs/task_node.log 
# Set the immediate flush to true (default) log4j.appender.FILE.ImmediateFlush=true 
# Set the threshold to debug mode log4j.appender.FILE.Threshold=INFO 
# Set the append to false, should not overwrite log4j.appender.FILE.Append=true 
# Set the DatePattern log4j.appender.FILE.DatePattern='_'yyyy-MM-dd 
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%5p] - %c -%F(%L) -%m%n

Usage

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

logger.info("xxx");