前言
将采用slf+log4j2方式进行打印日志，以下用两种方式，一种基于maven的springboot2，一种jdk6,普通jar包的springmvc
基于maven的springboot
第一步、由于前阵子java8可对应的log4j漏洞问题，公司要求log4j升级到2.17.1，因此需要把springboot自带的log4j进行排除引入高版本。
<properties>
<log4j2.version>2.17.1</log4j2.version>
</properties>
<!--log4j漏洞升级-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>第二步 log4j.xml
以下patternLayout做了对邮件、手机号、身份证号敏感数据转码**
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="ERROR">
<Appenders>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout>
<!-- <pattern>%d{ISO8601}|%level|%thread|%c{1.}|%L|%msg%n</pattern>-->
<pattern><![CDATA[%d{ISO8601}|%level|%thread|%c|%L|%replace{%replace{%replace{%msg}{(^|\D)([\d]{12})(\d{3}|\d{6}|\d{5}(\d|X|x))(\D|$)}{$1$2******$5}}{(^|\D)(1([358][0-9]|4[579]|66|7[0135678]|9[89])([0-9]{4})([0-9]{4}))(\D|$)}{$11$3****$5$6}}{(([A-Za-z0-9-_.]{1,3})([A-Za-z0-9-_.]*)(@[a-zA-Z0-9-_.]+(\.[a-zA-Z-_.]+)+))}{$2***$4}%n]]></pattern>
</PatternLayout>
</Console>
<RollingFile name="file" filePattern="/qhapp/applogs/imeeting/imeeting_business_%d{yyyyMMdd}_%i.log" immediateFlush="true">
<PatternLayout>
<pattern>%d{ISO8601}|%level|%thread|%c{1.}|%L|%msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy modulate="true" interval="1"/>
<SizeBasedTriggeringPolicy size="10 MB"/>
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="console"/>
</Root>
<Logger name="org.mybatis" level="INFO" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="org.springframework" level="INFO" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="com.company.booster" level="INFO" additivity="false">
<AppenderRef ref="console"/>
</Logger>
</Loggers>
</Configuration>第三步 输出sql的mapper接口包，写在*.properties，放置在resource下
#debug log 自己项目的包，写dao接口的位置
logging.level.com.company.pm.mapper=debug重新启动即可，sql日志就会出来，如果想自己logger出来，用slf即可
Logger logger = LoggerFactory.getLogger(getClass());
logger.debug("6867868@qq.com");第二种 jdk6,普通jar包的springmvc
spring3 + mybatis3
jdk6建议log4j版本为2.3.2(官方因漏洞推荐)，引入以下个jar包
log4j-slf4j-impl-2.3.2.jar、log4j-core-2.3.2.jar、log4j-api-2.3.2.jar、slf-api-1.7.25.jar、log4j-slf-impl-2.3.2.jar
由于不是maven项目，只是普通的mvc结构，因此我在src下建了两个文件log4j2.xml（有些是resource，这个项目前期没有这个，反正最后打包后在class下面就是了）
log4j2.xml，不知道，为啥在jdk6以及版本log4j2.3.2里面为何pattern不能写多个replace，因此我只排除了邮箱敏感信息
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="ERROR">
<Appenders>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout>
<pattern><![CDATA[%d{ISO8601}|%level|%thread|%c|%L|%replace{%msg}{(([A-Za-z0-9-_.]{1,3})([A-Za-z0-9-_.]*)(@[a-zA-Z0-9-_.]+(\.[a-zA-Z-_.]+)+))}{$2***$4}%n]]></pattern>
<!-- <pattern><![CDATA[%d{ISO8601}|%level|%thread|%c|%L|%replace{%replace{%replace{%msg}{(^|\D)([\d]{12})(\d{3}|\d{6}|\d{5}(\d|X|x))(\D|$)}{$1$2******$5}}{(^|\D)(1([358][0-9]|4[579]|66|7[0135678]|9[89])([0-9]{4})([0-9]{4}))(\D|$)}{$11$3****$5$6}}{(([A-Za-z0-9-_.]{1,3})([A-Za-z0-9-_.]*)(@[a-zA-Z0-9-_.]+(\.[a-zA-Z-_.]+)+))}{$2***$4}%n]]></pattern>-->
</PatternLayout>
</Console>
</Appenders>
<Loggers>
<Root level="INFO">
<AppenderRef ref="console"/>
</Root>
<Logger name="com.xxx自己的包.dao" level="DEBUG" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="org.mybatis" level="DEBUG" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="org.apache.ibatis" level="DEBUG" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="org.springframework" level="INFO" additivity="false">
<AppenderRef ref="console"/>
</Logger>
<Logger name="com.xxx自己的包" level="INFO" additivity="false">
<AppenderRef ref="console"/>
</Logger>
</Loggers>
</Configuration>mybatis-config.xml
<!-- 配置SqlSessionFactoryBean -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:configuration/mybatis-config.xml" />
.....
</bean>application-context.cml
<!-- 配置SqlSessionFactoryBean -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:configuration/mybatis-config.xml" />
.....
</bean>这里jdk6 slf+ log4j2有个坑点，我不知道为何log4j.properties与log4j.xml不能同时存在
测试类
Logger logger = LoggerFactory.getLogger(getClass());
logger.debug("6867868@qq.com");总结
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