log4j

What is the difference between log4j RollingFileAppender vs DailyRollingFileAppender

由 痴心易碎 提交于 2019-12-30 05:57:09
问题 What is the difference between log4j RollingFileAppender vs DailyRollingFileAppender ? and why would I use one verses the other? 回答1: Reading http://www.mail-archive.com/log4j-user@logging.apache.org/msg08183.html DailyRollingFileAppender - Rotates based on dateFormat RollingFileAppender - Rotates based on a maximum file size. Also check: http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/RollingFileAppender.html http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j

How can you find what URL was used in log4j default initialization?

由 烈酒焚心 提交于 2019-12-30 05:09:22
问题 Log4j default initialization goes through a procedure to find and use a URL to configure with. Afterward, how can you find out what URL was ultimately used, without having to code the same procedure yourself? (If you have to code it yourself, you might not get it exactly the same as log4j does, and also it might change in a future release.) 回答1: If you are willing to use AspectJ LTW (load-time weaving), you can take a look at the static initialisation of LogManager mentioned by Ian Roberts.

Logging Spring using Log4j2

由 こ雲淡風輕ζ 提交于 2019-12-30 02:43:11
问题 I'm trying to use Log4j2 to print the spring logs into a file and console. I guess it is a problem in my Log4j2 configuration. I have not been able to get it working. I have this configuration in my log4j2.xml file: <?xml version="1.0" encoding="UTF-8"?> <configuration name="defaultConfiguration" status="warn" strict="true" monitorInterval="5"> <properties> <property name="patternlayout">%d{ISO8601} [%t] %-5level %logger{36} - %msg%n%throwable{full}</property> <property name="filename">${env

MyBatis 入门Demo

由 无人久伴 提交于 2019-12-29 22:17:21
新建数据库my_db，新建表student_tb id为主键，不自动递增 下载MyBatis https://github.com/mybatis/mybatis-3/releases 解压。 新建Java项目，什么都不用勾选（如果要在IDEA中操作数据库，可勾选SQL Support）。 勾选后，IDEA右侧会有一个Database的工具，可在IDEA中直接操作数据库。 导入mybatis所有的jar包、数据库驱动 mybatis.jar是必需的。 lib是mybatis依赖的第三方jar包，根据需要选择，嫌麻烦或者小白，可全部导入lib中的jar。 pdf是mybatis的文档。 设置MyBatis的日志 在src下新建文件 log4j.properties ，内容如下： # Global logging configuration log4j.rootLogger=ERROR, stdout,A # MyBatis logging configuration... log4j.logger.org.mybatis.example.BlogMapper=TRACE # Console output... log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org

ClassCastException: org.slf4j.impl.Log4jLoggerAdapter cannot be cast to ch.qos.logback.classic.Logger

由 我们两清 提交于 2019-12-29 07:32:06
问题 I was following this answer in order to add a appender on runtime. Even though that works for the original poster, I get this exception in line Logger logger = (Logger) LoggerFactory.getLogger("abc.xyz"); : java.lang.ClassCastException: org.slf4j.impl.Log4jLoggerAdapter cannot be cast to ch.qos.logback.classic.Logger de.mypackage.controller.MyController.meinOeOrte(MyController.java:335) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke

Disable log4j console logging and enable file logging

由 假装没事ソ 提交于 2019-12-29 07:03:43
问题 My log4j.properties file is: log4j.rootLogger=WARN, stdout, file log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d [%t] %p [%c] - %m%n log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=${jboss.server.log.dir}/afrodite.log log4j.appender.file.MaxFileSize=10MB log4j.appender.file.MaxBackupIndex=10 log4j.appender.file.Append=true log4j.appender.file

Disable log4j console logging and enable file logging

由 喜欢而已 提交于 2019-12-29 07:03:15
问题 My log4j.properties file is: log4j.rootLogger=WARN, stdout, file log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d [%t] %p [%c] - %m%n log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=${jboss.server.log.dir}/afrodite.log log4j.appender.file.MaxFileSize=10MB log4j.appender.file.MaxBackupIndex=10 log4j.appender.file.Append=true log4j.appender.file

Disable log4j console logging and enable file logging

由 China☆狼群 提交于 2019-12-29 07:03:05
问题 My log4j.properties file is: log4j.rootLogger=WARN, stdout, file log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d [%t] %p [%c] - %m%n log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=${jboss.server.log.dir}/afrodite.log log4j.appender.file.MaxFileSize=10MB log4j.appender.file.MaxBackupIndex=10 log4j.appender.file.Append=true log4j.appender.file

How to dynamically change log level in SLF4j OR Log4J

由 妖精的绣舞 提交于 2019-12-29 06:43:26
问题 Recently I encountered a situtation where Application Loglevel changes dynamically. Application Admin can set it to INFO/DEBUG/ WARN from front end. Based on the log level choosen be him application logging must be changed. I am sure loggers support this scenario, but not sure how can I achive this. If any of you have idea/thoughts on this please let me know. Thanks in advance for your help. -Narendra 回答1: Consider Logback http://logback.qos.ch/ - "a successor to the popular log4j project,

Logging error to stderr and debug, info to stdout with log4j

由 為{幸葍}努か 提交于 2019-12-29 02:36:07
问题 I want to add logging to an application I am developing, using apache log4j. At this point I want to redirect all log messages for level INFO and lower (TRACE, DEBUG) to stdout and all other log messages from WARN and above (ERROR, FATAL) to stderr. For example: ... logger.info("Processing at some point"); // must be written to stdout logger.debug("Point x was processed"); // must be written to stdout logger.warn("Incorrect point config"); // must be written only to stderr logger.error(
订阅 log4j