SSM整合log4j2

SSM搭建请参考：

log4j2好像跟log4j不太一样，log4j2.properties的配置文件也不同于原始的log4j.properties。具体请参考官网：log4j2官网

1.添加pom.xml依赖

<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-slf4j-impl -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.11.2</version>
</dependency>
        
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-web -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-web</artifactId>
    <version>2.11.2</version>
</dependency>
        
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-jcl -->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-jcl</artifactId>
    <version>2.11.2</version>
</dependency>

2.在web.xml文件中配置监听器

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
  
<listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
  
<listener>
    <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>
<context-param>
    <param-name>log4jConfiguration</param-name>
    <!--默认是classpath下的log4j2.xml-->
    <param-value>classpath:log4j2.xml</param-value>
</context-param>

3.在指定的log4j2的配置路径下添加log4j2.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN" monitorInterval="30">
    <Properties>
        <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level
            %logger{36} - %msg%n</property>
    </Properties>

    <Appenders>
        <!--这个输出控制台的配置 -->
        <Console name="Console" target="SYSTEM_OUT">
            <!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
            <ThresholdFilter level="trace" onMatch="ACCEPT"
                onMismatch="DENY" />
            <PatternLayout pattern="${PATTERN}" />
        </Console>
    </Appenders>

    <!--然后定义logger，只有定义了logger并引入的appender，appender才会生效 -->
    <Loggers>
        <!-- 配置日志的根节点 -->
        <root level="debug">
            <appender-ref ref="Console" />
        </root>

    </Loggers>
</Configuration>

4.搞定！

参考文章：ssm框架整合log4j2搭建