SpringMVC配置log4j

log4j教程    http://www.yiibai.com/log4j/

本教程工具

IDE为IntelliJ IDEA 2017.2

JDK环境为1.8

maven版本为maven3

Tomcat版本为8.5

一、添加log4j依赖

<!-- Logging --><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.6.6</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>jcl-over-slf4j</artifactId><version>1.6.6</version><scope>runtime</scope></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.6.6</version><scope>runtime</scope></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.14</version></dependency>

二、创建log4j.xml

在resource目录下创建log4j.xml，内容如下：

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd"><log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">    <!-- [控制台STDOUT] -->    <appender name="console" class="org.apache.log4j.ConsoleAppender">        <param name="encoding" value="UTF-8"/>        <param name="target" value="System.out"/>        <layout class="org.apache.log4j.PatternLayout">            <param name="ConversionPattern" value="%-5p %c{2} - %m%n"/>        </layout>    </appender>    <!-- [公共Appender] -->    <appender name="DEFAULT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">        <param name="File" value="${catalina.base}/logs/schedule.log"/>        <param name="Append" value="true"/>        <param name="encoding" value="UTF-8"/>        <param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>        <layout class="org.apache.log4j.PatternLayout">            <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n"/>        </layout>    </appender>    <!-- [错误日志APPENDER] -->    <appender name="ERROR-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">        <param name="File" value="${catalina.base}/logs/common-error.log"/>        <param name="Append" value="true"/>        <param name="encoding" value="UTF-8"/>        <param name="threshold" value="error"/>        <param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>        <layout class="org.apache.log4j.PatternLayout">            <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n"/>        </layout>    </appender>    <!-- [组件日志APPENDER] -->    <appender name="COMPONENT-APPENDER"              class="org.apache.log4j.DailyRollingFileAppender">        <param name="File" value="${catalina.base}/logs/logistics-component.log"/>        <param name="Append" value="true"/>        <param name="encoding" value="UTF-8"/>        <param name="DatePattern" value="'.'yyyy-MM-dd'.log'"/>        <layout class="org.apache.log4j.PatternLayout">            <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n"/>        </layout>    </appender>    <!-- [组件日志] -->    <logger name="LOGISTICS-COMPONENT">        <level value="debug"/>        <appender-ref ref="COMPONENT-APPENDER"/>        <appender-ref ref="ERROR-APPENDER"/>    </logger>    <!-- Root Logger -->    <root>        <level value="debug"></level>        <appender-ref ref="DEFAULT-APPENDER"/>        <appender-ref ref="ERROR-APPENDER"/>    </root></log4j:configuration>

三、修改web.xml

在web.xml文件的<web-app>节点下，添加如下信息：

<!-- log4j 系统日志-->    <context-param>        <param-name>log4jConfigLocation</param-name>        <param-value>classpath:log4j.xml</param-value>    </context-param>    <!-- 配置log4j.xml监听器 -->    <listener>        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>    </listener>    <!-- 配置log4j.xml变量 -->    <context-param>        <param-name>rootLevel</param-name>        <param-value>DEBUG</param-value>    </context-param>    <context-param>        <param-name>loggingLevel</param-name>        <param-value>INFO</param-value>    </context-param>

注意点：

Log4j.xml指定错误日志输出的部分：

<param name="File" value="${catalina.base}/logs/common-error.log"/>

Value不要指定工程的相对路径。一般是按上面的方式部署到tomcat目录下logs文件夹下。