log4j

spring boot 整合log4j2 日志框架

我是研究僧i 提交于 2019-12-06 22:11:53
slf4j为spring boot 的日志功能定义了一套统一的接口,方便各种日志框架去实现。 SLF4J——Simple Logging Facade For Java ,它是一个针对于各类Java日志框架的统一Facade抽象。Java日志框架众多——常用的有java.util.logging, log4j, logback,commons-logging, Spring框架使用的是Jakarta Commons Logging API (JCL)。而SLF4J定义了统一的日志抽象接口,而真正的日志实现则是在运行时决定的——它提供了各类日志框架的binding。 spring boot默认使用的日志框架是logback,它的maven jar包名称叫 spring-boot-starter-logging 这里我们谈谈spring boot 整合log4j2日志框架。 当然,logback,log4j和log4j2,肯定都是实现了slf4j接口的日志框架。 这里要注意,之前看其他文章,有人说过spring boot 版本超过1.4,就不再支持log4j了,需要使用log4j2框架。 前言 本文解决以下问题: - 为何使用log4j2 - springboot下log4j2日志的使用 - 控制台日志显示的级别和文件保存的日志不同 - idea控制台颜色日志的输出 正文 log4j2

ZooKeeper 学习之logback配置文件

那年仲夏 提交于 2019-12-06 22:05:00
ZooKeeper 学习之logback配置 这是一个读写zk的学习项目,用到了zookeeper、logback、slf4j、maven等工具 项目目录结构 Maven Pom 文件配置 zk中使用到了log4j,因此需要将其排除 pom.xml 文件中logback的依赖配置: < dependencies > < dependency > < groupId > org.apache.zookeeper </ groupId > < artifactId > zookeeper </ artifactId > < version > 3.4.6 </ version > < exclusions > < exclusion > < groupId > org.slf4j </ groupId > < artifactId > slf4j-log4j12 </ artifactId > </ exclusion > < exclusion > < groupId > log4j </ groupId > < artifactId > log4j </ artifactId > </ exclusion > </ exclusions > </ dependency > < dependency > < groupId > org.slf4j </ groupId > <

springboot logback配置

五迷三道 提交于 2019-12-06 22:03:59
sprintboot 日志管理 spring boot自带了log打印功能,使用的是Commons logging 具体可以参考 Spring Boot Log logback配置 logback是log4j的升级版,配置简单,性能更好,因此使用其作为SpringBoot项目的日志管理框架,以下为配置流程 1. application.properties中指定logback配置文件地址 logging . config = classpath : logback . xml 2. 编写logback配置文件 可根据注释,根据需求,更改配置 < ? xml version = "1.0" encoding = "UTF-8" ? > < ! -- Copyright 2010 - 2011 The myBatis Team Licensed under the Apache License , Version 2.0 ( the "License" ) ; you may not use this file except in compliance with the License . You may obtain a copy of the License at http : / / www . apache . org / licenses / LICENSE - 2.0

logback配置Druid Filter

♀尐吖头ヾ 提交于 2019-12-06 22:02:38
现在大多数Druid配置都是log4j作为logger,但是logback作为新一代的日志框架,我们有理由使用logback配置Druid Filter,之前的配置是: dataSourceA.filters=stat,wall,log4j Druid支持配置多种Filter,配置信息保存在druid-xxx.jar!/META-INF/druid-filter.properties下面,具体如下: druid.filters.default=com.alibaba.druid.filter.stat.StatFilter druid.filters.stat=com.alibaba.druid.filter.stat.StatFilter druid.filters.mergeStat=com.alibaba.druid.filter.stat.MergeStatFilter druid.filters.counter=com.alibaba.druid.filter.stat.StatFilter druid.filters.encoding=com.alibaba.druid.filter.encoding.EncodingConvertFilter druid.filters.log4j=com.alibaba.druid.filter.logging

Can IntelliJ create hyperlinks to the source code from log4j output?

纵然是瞬间 提交于 2019-12-06 21:53:38
问题 In the IntelliJ console, stack traces automatically contain hyperlinks that bring you to the relevant source files. The links appear at the end of each line in the format (Log4jLoggerTest.java:25). I can configure log4j to output text in a similar format. log4j.appender.Console.layout.ConversionPattern=%d{ABSOLUTE} (%F:%L) - %m%n In eclipse, the console automatically turned text like this into links. In IntelliJ, the stack traces are links but my own output in the same form remains un-linked.

Compare log4j and Logger

不问归期 提交于 2019-12-06 21:21:41
问题 How does The JDK's Logger compare to Apache log4j? Which one is better for new projects that target Java 6? How do they compare in terms of flexibility and configurability? 回答1: To my mind the only thing the JDK Logger has going for it is that it is part of the JDK, so it doesn't add an external dependency. If the choice is only between those two, I'd go with Log4j. It still has better support in terms of appenders, the number of people who know it (in my anecdotal observations), and a better

How to conditionally add text from MDC on a LOG4J pattern?

拟墨画扇 提交于 2019-12-06 20:55:29
问题 How do I print a key/value pair on a log4j entry only if the value is set on MDC? For example, I currently have the following pattern: %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - client=%X{client} %m%n I'd like to print the "client=" part only if there is a value on MDC for this key. For example, when starting my program, there will be no client logged in, so logs would be recorded using this pattern: %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n However, after the client has logged in (and after

Can log4j inherit xml from a base/root element?

时光怂恿深爱的人放手 提交于 2019-12-06 19:22:41
问题 I'm trying to reduce duplication in my log4j configuration and wanted to know if I could push similar config down to a root.xml file and inherit from it in each of the child log4j.xml files? Thank you! 回答1: AFAIK there's no "native" inheritance mechanism, but you may achieve the same result using an entity to reference and include an external xml fragment (see this nabble thread). If you just want to modify certain properties, a similar solution is described here. An Example using external

Where to configure internal tomcat7 stdout/stderr log files

牧云@^-^@ 提交于 2019-12-06 19:04:25
问题 I'm using tomcat 7.0.40 with log4j config according to http://tomcat.apache.org/tomcat-7.0-doc/logging.html Everything's working as expected, except that some logfiles are created, which are actually not configured in my log4j.properties: log4j.rootLogger=INFO, CATALINA # Define all the appenders log4j.appender.CATALINA=org.apache.log4j.RollingFileAppender log4j.appender.CATALINA.File=${catalina.base}/logs/catalina.log log4j.appender.CATALINA.MaxFileSize=3MB log4j.appender.CATALINA

SpringBoot2.0学习笔记:(四) Spring Boot的日志详解

耗尽温柔 提交于 2019-12-06 17:54:57
一、日志框架的介绍 市面上有许多的日志框架,比如 JUL( java.util.logging), JCL( Apache Commons Logging), Log4j, Log4j2, Logback、 SLF4j、 jboss-logging等等。 Spring Boot 2.*默认采用了slf4j+logback的形式 ,slf4j是个通用的日志门面,logback就是个具体的日志框架了,我们记录日志的时候采用slf4j的方法去记录日志,底层的实现就是根据引用的不同日志jar去判定了。所以Spring Boot也能自动适配JCL、JUL、Log4J等日志框架,它的内部逻辑就是通过特定的JAR包去适配各个不同的日志框架。 从上图可以看出,Spring Boot通过jul-to-slf4j.jar去适配了JUL日志框架,通过log4j-to-slf4j.jar去适配了log4j日志框架。我们得知道,Spring5.x相对于Spring4.x有个不同的地方就是对底层使用的日志框架有了个大的改变,去除了原来默认使用的JCL 框架,而是采用SLF4j这个通用的日志门面,所以Spring Boot2.x相对于Spring Boot1.x来说去除了对JCL的适配。 SpringBoot能自动适配所有的日志,其底层使用slf4j+logback的方式记录日志,引入其他框架的时候,只需要