spring整合log4j報錯升級到log4j2 教程

在上一篇博客的基礎上整合 log4j

注：spring5的api裏已經不支持log4j。spring建議用log4j2 來替換這個類

• 在pom.xml中新增 log4j的相關jar包

<!-- log4j2 日誌  注：spring5已放棄log4j, spring建議用log4j2 -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.10.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.10.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>2.9.1</version>
        </dependency>

• 在 web.xml 中配置 log4j ，添加如下配置

<!-- log4j2-begin -->
    <listener>
        <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
    </listener>
    <filter>
        <filter-name>log4jServletFilter</filter-name>
        <filter-class>org.apache.logging.log4j.web.Log4jServletFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>log4jServletFilter</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
        <dispatcher>INCLUDE</dispatcher>
        <dispatcher>ERROR</dispatcher>
    </filter-mapping>
    <!-- log4j2-end -->

 

注意：log4j2不再支持properties文件了，只支持xml，json或是yaml，不指定位置的情況下默認在src/main/resources下查找。

　　　如果需要自定義位置，需要在上面的web.xml中添加以下代碼

1 <context-param>  
2   <param-name>log4jConfiguration</param-name>  
3   <param-value>/WEB-INF/classes/log4j2.xml</param-value>  
4 </context-param> 

注：如果 <dispatcher> 報錯 element dispatcher is not allowed here，則需要修改<web-app>.如下：

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

• 配置 log4j2.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" monitorInterval="1800">
    <properties>
        <property name="LOG_HOME">/WEB-INF/logs</property>
        <property name="FILE_NAME">finance-pay</property>
    </properties>


    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        </Console>

        <RollingFile name="running-log" fileName="${LOG_HOME}/${FILE_NAME}.log"
                     filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd}-%i.log.gz"
                     immediateFlush="true">
            <PatternLayout
                    pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingFile>
    </Appenders>
    <Loggers>

        <!-- <Logger name="com.cssweb.test.app" level="trace" additivity="true">
            <AppenderRef ref="running-log" /> </Logger> -->

        <Root level="info">
            <!-- 這裏是輸入到文件，很重要-->
            <AppenderRef ref="running-log" />
            <!-- 這裏是輸入到控制檯-->
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>

如有不當之處請多多指教，如對你有所幫助，請留言或點贊予以支持，謝謝！