log4j项目

pom.xml

 <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <log.version>2.14.0</log.version>
        <!-- jdk7升级倒2.12.4， jdk8升级到2.17.1 -->
<!--        <log.version>2.17.1</log.version>-->
<!--                <log.version>2.15.0</log.version>-->
    </properties>

    <dependencies>



        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log.version}</version>
        </dependency>
    </dependencies>

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">

 <!--全局参数-->
 <Properties>
  <Property name="pattern">%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n</Property>
  <Property name="logDir">/data/logs/dust-server</Property>
 </Properties>

 <Loggers>
  <Root level="INFO">
   <AppenderRef ref="console"/>
   <AppenderRef ref="rolling_file"/>
  </Root>
 </Loggers>

 <Appenders>
  <!-- 定义输出到控制台 -->
  <Console name="console" target="SYSTEM_OUT" follow="true">
   <!--控制台只输出level及以上级别的信息-->
   <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
   <PatternLayout>
    <Pattern>${pattern}</Pattern>
   </PatternLayout>
  </Console>
  <!-- 同一来源的Appender可以定义多个RollingFile，定义按天存储日志 -->
  <RollingFile name="rolling_file"
               fileName="${logDir}/dust-server.log"
               filePattern="${logDir}/dust-server_%d{yyyy-MM-dd}.log">
   <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>
   <PatternLayout>
    <Pattern>${pattern}</Pattern>
   </PatternLayout>
   <Policies>
    <TimeBasedTriggeringPolicy interval="1"/>
   </Policies>
   <!-- 日志保留策略，配置只保留七天 -->
   <DefaultRolloverStrategy>
    <Delete basePath="${logDir}/" maxDepth="1">
     <IfFileName glob="dust-server_*.log" />
     <IfLastModified age="7d" />
    </Delete>
   </DefaultRolloverStrategy>
  </RollingFile>
 </Appenders>
</Configuration>

Log4j2Demo

package org.example;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class Log4j2Demo {

    /**
     * 版本2.14.0：
     * 2022-03-08 10:44:15,130  INFO Log4j2Demo:10 - --------------start---------------
     * 2022-03-08 10:44:15,140  INFO Log4j2Demo:13 - Hello, Windows 10 10.0, architecture: amd64-64
     * 2022-03-08 10:44:15,140  INFO Log4j2Demo:14 - --------------end---------------
     *
     * 升级到2.15.0|2.17.1版本后：
     * 2022-03-08 10:49:42,866  INFO Log4j2Demo:19 - Hello, ${java:os}
     *
     */
    private static  final Logger LOGGER = LogManager.getLogger();
    public static void main(String[] args) {
        LOGGER.info("--------------start---------------");
        String username="1111${java:os}";

        LOGGER.info("Hello, {}",username);
        LOGGER.info("Hello, {}", "${java:os}");
        LOGGER.info("--------------end---------------");
    }
}

执行main函数发现如下，会存在安全漏洞
在这里插入图片描述

升级logback日志

pom.xml加上下面

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-to-slf4j</artifactId>
            <version>2.8.2</version>
            <!--            <version>${log.version}</version>-->
        </dependency>

logback.xml

<configuration>
    <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                [logback]%black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
            </Pattern>
        </layout>
    </appender>

    <root level="DEBUG">
        <appender-ref ref="Console" />
    </root>
</configuration>

再执行main函数，漏洞不存在了
在这里插入图片描述