log4j简单配置

1:下载log4j-all-1.3alpha-8.jar包,加入项目中.

2:在源文件夹下创建一个log4j.xml文件,文件内容如下(根据需求修改):

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configuration ><configuration xmlns='http://logging.apache.org/'> <!-- Append log to the CONSOLE appender --> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d %-5p [%t] %c - %m%n"/> </layout> </appender> <root> <level value="debug"/> <appender-ref ref="console"/> </root> </configuration>

 

3:web.xml加入配置,内容如下:

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <listener> <listener-class>org.apache.log4j.selector.servlet.ContextDetachingSCL</listener-class> </listener> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <login-config> <auth-method>BASIC</auth-method> </login-config> <env-entry> <description>URL for configuring log4j context</description> <env-entry-name>log4j/configuration-resource</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>log4j.xml</env-entry-value> </env-entry></web-app>