sl4j vs log4j

In the software, it is inevitable to use something like log4net, log4j, tracer to write logs. No matter what you use, these things are mostly similar and generally provide such five log levels: Debug Info Warn Error Fatal A level is higher than a level, but in specific development, there is no good article to explain how to select a level for adaptation. Record some of your opinions for future use. === Debug === The lowest level is generally

-source or internal class libraries makes it independent from any specific log implementation. This means that you do not need to manage multiple log configurations or multiple log class libraries, your client is very grateful for this. Slf4j provides a placeholder-based LOG method, which improves code readability by checking isdebugenabled (), isinfoenabled (), and so on. By using slf4j's log method, you can delay the overhead of building log information (srting) until you actually need it, w

Detailed parsing of _ Log4j _ configuration, parsing _ log4j Configuration 1. Introduction to Log4j Log4j has three main components: Loggers, Appenders, and Layouts ). This can be simply understood as the log category, where the log is to be output, and in what form the log is output. Using these three components toget

Log4j configuration details, log4j details 1. Introduction to Log4jLog4j has three main components: Loggers, Appenders, and Layouts ). This can be simply understood as the log category, where the log is to be output, and in what form the log is output. Using these three components together, you can easily record the types and levels of information and control the log output style and position at runtime.1.

Springboot project started, using the Druid data source, log4j error2018---£ º21.168 1496 ---[ Restartedmain] o.hibernate.annotations.common.version : hcann000001:hibernate Commons Annotations {5.0 . 1 for logger (druid.sql.Connection). Log4j:warn Initialize the log4j system Properly.log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for m

Java-based log4j configuration and java-based log4j Configuration Java-based log4j Configuration Log4j has many advantages and is easy to use, that is, it is difficult to configure. Next I will introduce the configuration method of log4j.

Log4j: warn no appenders cocould be found for Logger (Org. springframework. Context. Support. classpathxmlapplicationcontext ). Log4j: Warn please initialize the log4j system properly. Spring uses the open-source framework log4j to output information, To solve this problem, you can create a

job, which means your application has better throughput and performance. These benefits are just the tip of the iceberg, and you'll know more about the benefits when you start using sl4j and reading the code. I strongly suggest that any new Java programmer should use SLF4J as a log instead of using other log APIs, including log4j. Read MORE: Http://javarevisited.blogspot.com/2013/08/why-u

In the previous article to introduce you to the Java log4j Detailed tutorial, this article to introduce the Java Web log4j configuration and the Web project configuration log4j techniques. Please see below for details. First to provide you with Log4j.jar download: http://logging.apache.org/log4j/1.2/download.html Jav

Turn from: http://shuiranyue.blog.163.com/blog/static/42199034200810261307771/ log4j Introduction Simply put, log4j is the API class library that helps developers with log output management. The most important feature of it is You can configure the file to flexibly set the priority of the log information, the output destination of the log information, and the output format of the log information.

Set the directory by yourself, that is, set through system. setproperty at project startup to implement servletcontextlistener: Public class log4jlistener implements servletcontextlistener { Public static final string log4jdirkey = "log4jdir "; Public void contextdestroyed (servletcontextevent ){ System. getproperties (). Remove (log4jdirkey ); } Public void contextinitialized (servletcontextevent ){ String log4jdir = servletcontextevent. getservletcontext (). getrealpath ("/"); // System. Out

Log4j-1.2.16.ja environment: myeclipse10 + log4j1.2.16 + jdk1.6 1. Create a Java project named log4jtest. 2. SetLog4j-1.2.16.jar copy to project root directory, right-click Project, properties, Java build path, add jars, selectLog4j-1.2.16.jar 3. InSource codeDirectory to create an XML file: log4j. xml. The configuration starts. The content is as follows: XML version = "1.0" encoding = "UTF-8"

Log4j 2.0 advanced usage in development-SocketAppender remote output (5), log4j configuration detailsLog4j2 Appenders fully consider the possibility of log event output, packaging, and filtering forwarding, including the most basic output to a local file and output to a remote host,The file is encapsulated and injected, and automatically stored according to the log file time point, file size, and other cond

LOG4J configuration:　　Instead of using configuration files at all, you can configure the LOG4J environment in your code. However, using a configuration file will make your application more flexible. LOG4J supports two configuration file formats, one in XML format and the properties file (key = value).　　Log4j has three

Log4j configuration, log4j First configure the source file log4j. properties The following is an important explanation: Log4j. rootLogger = DEBUG, CONSOLE, FILE ----- configure the root Logger. The first word "DEBUG" after the equal sign indicates the output level (there are five levels of fatal errorwarn info debug.

Details on the use of Log4J log management, which is essential for java Development I. Preface:Log4j is an open source project and is a widely used logging package written in Java. Due to the outstanding performance of log4j, at the time when log4j was completed, the log4j development organization suggested that sun re

Details on the use of log4j log management, which is essential for Java DevelopmentI. Preface:Log4j is an open source project and is a widely used logging package written in Java. Due to the outstanding performance of log4j, at the time when log4j was completed, the log4j development organization suggested that sun rep

Log4j 2.0 advanced usage in development-console output with simple configuration (3), log4j usageLog4j 2.0 has recently ushered in major version upgrades. In addition to the deadlock bug in 1.x, the performance is also improved by 10 times.The new features are also available in the latest version. The configuration file is not limited to the xml and java properties files. Json and yaml configuration files a

Log4j Introduction Basically all large-scale applications, including our commonly used frameworks, such as Hibernate, spring, and struts, provide a certain amount of log information within them. Why is this log information hard-coded in the system? It is a way to debug the system and observe the system running status. Most programmers may remember that when they first wrote code, they always failed to write a method and liked to use system. out. print

Requirements: Place the log4j.properties configuration problem in the specified folder outside the project. Specific reasons refer to http://blog.csdn.net/lihe2008125/article/details/7764247. By default, log4j automatically loads the configuration file in Classpath. And log4j.properties that are not packaged take precedence over log4j.properties files that are larger in the jar package. (Here you can recall the configuration in your project) You can a