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Web项目Spring 5.x使用log4j 2

2024-11-26 来源:个人技术集锦

Spring从4.x版开始,日志方面不再使用陈旧的log4j 1,改为支持log4j 2版,网上的在web.xml中配置Log4jConfigListener监听器的方法都是老版,目前已经不适用。在Spring 4.x+版本中使用log4j 2的步骤为:


1.导入依赖(Maven)

<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>

2.类中声明日志记录器

Logger logger = LogManager.getLogger(当前类名.class);

3.配置文件

<?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">appsys</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>
        <Root level="trace">
            <!-- 这里是输入到文件,很重要-->
            <AppenderRef ref="running-log" />
            <!-- 这里是输入到控制台-->
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>

4.web.xml中添加监听器

<listener>
        <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>

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