Log4j Tutorial
Apache log4j, a classic logging tool in Java. Here are a series of Log4j 1.2 tutorials.
JSF 2 + Log4j Integration Example
In this tutorial, we will show you how to integrate the log4j framework with the JSF 2.x web application. JSF is using java.util.logging, you need extra works to redirect the logging from JSF’s java.util.logging to log4j, with a serious penalty of performance, make sure use this trick only during local development or debugging environment. Review […]
Log4j hello world example
In this tutorial, we will show you how to use the classic log4j 1.2.x to log a debug or error message in a Java application. 1. Project Directory Review the final project structure, a standard Maven style Java project. 2. Get Log4j Declares the following dependencies : pom.xml <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> For non-Maven […]
log4j.xml Example
Here’s an XML version of log4j properties file, just for sharing. 1. Output to Console Redirect the logging to console. log4j.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration debug="true" xmlns:log4j=’http://jakarta.apache.org/log4j/’> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L – %m%n" /> </layout> </appender> <root> <level value="DEBUG" /> <appender-ref ref="console" /> […]
Spring MVC + Log4j example
In this tutorial, we will show you how to use the log4j framework to do the logging in a Spring MVC web application. Technologies and tools used : Log4j 1.2.17 Spring 4.1.6.RELEASE Maven 3 Tomcat 6 Eclipse Kepler 4.3 Note By default, Spring (spring-core) is using the JCL (commons-logging) for logging, and the JCL has […]
How to display hibernate sql parameter values – Log4j
Problem Hibernate has basic logging feature to display the SQL generated statement with show_sql configuration property. Hibernate: INSERT INTO mkyong.stock_transaction (CHANGE, CLOSE, DATE, OPEN, STOCK_ID, VOLUME) VALUES (?, ?, ?, ?, ?, ?) However , it just isn’t enough for debugging, the Hibernate SQL parameter values are missing. Solution – Log4j Log4J is required to […]
log4j.properties example
I can’t find many log4j.properties examples, here are a few log4j.properties examples that are used in my project, just for sharing. 1. Output to Console All logging will be redirected to your console. log4j.properties # Root logger option log4j.rootLogger=INFO, stdout # Direct log messages to stdout 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 […]
How to configure logging in Hibernate – SLF4j + Log4j
Try logback Try logback logging framework, read this article for the “reasons to prefer logback over log4j. To integrate logback with Hibernate, refer this – How to configure logging in Hibernate – Logback Hibernate uses Simple Logging Facade for Java (SLF4J) to redirect the logging output to your perfer logging frameworkis (log4j, JCL, JDK logging, […]