log4j

I've using SLF4j as my logging framework, backed by log4j. My problem is that I am looking for a way to change the logging level for my logger at runtime. I understand that slf4j does not permit this directly through its own API, and hence, I have to access the logging provider directly. Personally, I find this to be a huge deficiency in slf4j. So now my question is how can I determine programatically through slf4j which provider I am using? The biggest purpose of using slf4j is that you become provider agnostic - you can easily switch between your favourite logging system without having to

1. 在pom.xml中配置Log4j2相关的类包 <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>${log4j2.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j2.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-jcl</artifactId> <version>${log4j2.version}</version> </dependency> 其中的log4j2-jcl包是spring能正常调用log4j2的关键包，其主要是对spring框架中使用的commons-logging包的实现，可以让spring识别并使用log4j2。 2. 在classpath下放置log4j2-test.xml配置文件（或者是*

一.集成Log4j2 创建“springBootLog4j2”工程，打开pom.xml文件，移除logback依赖，添加log4j2日志引用 二.引用外部默认的log4j2日志文件 1.在application.properties中，配置外部日志文件 ##自定义配置文件名称 logging.config=classpath:log4j2-spring.xml 2.在“src/main/resources”下创建log4j2-spring.xml，内容如下： <?xml version="1.0" encoding="utf-8"?> <configuration> <properties> <!-- 文件输出格式 --> <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} |-%-5level [%thread] %c [%L] -| %msg%n</property> </properties> <appenders> <Console name="CONSOLE" target="system_out"> <PatternLayout pattern="${PATTERN}" /> </Console> </appenders> <loggers> <logger name="com.black.example.*"

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.MaxBackupIndex=10 log4j.appender.CATALINA.Append=true log4j.appender.CATALINA.Encoding=UTF-8 log4j.appender

I'm trying to log all DEBUG messages to console during testing in maven. For this purpose I created a file src/test/resources/log4j.properties , which is going to override the configuration I already have in src/main/resources/log4j.properties . Unfortunately such an overriding is not happening. Why and how to fix it? Rename your test configuration file to e.g. log4j-surefire.properties and configure log4j to pick it up during surefire execution: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.6</version> <configuration>

web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <!-- Web项目中，引入Spring --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 整合SPringMVC --> <servlet> <servlet-name

搭建zookeeper集群 创建docker-compose.yml文件 ``` version: '3.1' services: zoo1: image: zookeeper restart: always container_name: zoo1 ports: - 2181:2181 volumes: - /usr/local/docker/zookeeper/zoo1/data:/data - /usr/local/docker/zookeeper/zoo1/datalog:/datalog environment: ZOO_MY_ID: 1 ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181 zoo2: image: zookeeper restart: always container_name: zoo2 ports: - 2182:2181 volumes: - /usr/local/docker/zookeeper/zoo2/data:/data - /usr/local/docker/zookeeper/zoo2/datalog:/datalog environment: ZOO_MY_ID: 2 ZOO