log4j2指定日志文件路径到工程路径

1、pom.xml中配置log4j2所使用的jar包

<!-- log4j2 -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>${log4j}</version>
        </dependency>

2、在classpath目录中创建log4j2.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO" monitorInterval="600">
    <!--先定义所有的appender -->
    <appenders>
        <!--输出控制台 -->
        <Console name="Console" target="SYSTEM_OUT">
            <ThresholdFilter level="debug" />
            <PatternLayout charset="GBK"
                pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n" />
        </Console>
        <!--输出到文件-->
        <File name="LogFile" fileName="${web:rootDir}/logs/app.log" advertise="true">
            <PatternLayout pattern="%d %p %C{1.} [%t] %m%n" />
        </File>
    </appenders>

    <loggers>
        <!--建立一个默认的root的logger -->
        <root level="info">
            <appender-ref ref="LogFile" />
            <appender-ref ref="Console" />
        </root>
    </loggers>
</Configuration>

3、web.xml中添加如下信息

    <context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>webApp.root</param-value>
    </context-param>
    <listener>
        <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
    </listener>