我已创建log4j.properties
文件并将其放在/src/main/resources/
下,此文件的内容为:
log4j.rootLogger = DEBUG, FILE
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=log.out
# Set the immediate flush to true (default)
log4j.appender.FILE.ImmediateFlush=true
# Set the threshold to debug mode
log4j.appender.FILE.Threshold=debug
# Set the append to false, overwrite
log4j.appender.FILE.Append=false
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n
我想在文件log.out
中看到日志,但是当我使用命令运行应用程序时:
java -jar myapp.jar -Dlog4j.debug
该文件未创建。
这是 - 如评论中所要求的 - 我如何在代码中使用它:
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
private static final Logger LOG = LogManager.getLogger(MyClass.class);
然后:
LOG.debug("some message");
LOG.error("some other msg", error);
请在下面找到实施:
log4j.properties
在`
的src / main /资源
`
# Root logger option
log4j.rootLogger=INFO, stdout, file
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
#outputs to Tomcat home
log4j.appender.file.File=D:/demo/logs/myapp/myapp.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
除此之外,我还在Logger
进口了class
。
package org.nbk.demo;
import org.apache.log4j.Logger;
public class ServerStartup {
private static final Logger logger = Logger.getLogger(ServerStartup.class);
public void onApplicationEvent() {
logger.info("Information Messages");
}
}