druid添加log4j2

    引入依賴
    配置log4j2
        配置數據源
        配置log4j2-filter
        配置log4j2.xml

引入依賴

    <!-- druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>

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


配置log4j2
配置數據源

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <!--MySQL驅動-->
        <property name="driverClassName" value="${db.driverClassName}"/>
        <!--MySQL連接的url-->
        <property name="url" value="${db.url}"/>
        <!--連接數據庫的名稱-->
        <property name="username" value="${db.username}"/>
        <!--連接數據庫的密碼-->
        <property name="password" value="${db.password}"/>
        <!--初始化的大小-->
        <property name="initialSize" value="3"/>
        <!--數據庫連接池——最小空余的數量-->
        <property name="minIdle" value="3"/>
        <!--數據庫連接池——最大的活躍數量-->
        <property name="maxActive" value="20"/>
        <!--最長等待時間，一旦超過該時間則認為是超時-->
        <property name="maxWait" value="60000"/>
        <!--過濾器-->
        <property name="filters" value="stat,wall"/>
        <!--proxyFilters是代理filter的意思-->
        <property name="proxyFilters">
            <list>
                <ref bean="log4j2-filter"/>
            </list>
        </property>
    </bean>

  在這里，由於日志的記錄並不是由Druid執行的，而是由log4j2因而我們需要在這里指明proxyFilters為log4j2-filter
配置log4j2-filter

<!--配置log4j2的Log4j2Filter-->
    <bean id="log4j2-filter" class="com.alibaba.druid.filter.logging.Log4j2Filter">
        <property name="connectionLogEnabled" value="false"/>
        <property name="statementLogEnabled" value="false"/>
        <property name="resultSetLogEnabled" value="true"/>
        <property name="statementExecutableSqlLogEnable" value="true"/>
    </bean>

    1
    2
    3
    4
    5
    6
    7

  在這里，我們開發項目時有時非常想看在控制台中打印的SQL信息，所以說我們會將resultSetLogEnabled設置為true，如果不想查看，那么我們只需要將其更改為false即可。
配置log4j2.xml

  在Druid官網中說，下面的配置是可以在項目中直接拿來使用的，所以說我就不做什么修改，直接將其貼出來，如果想看源文檔的話，可以訪問Druid中使用log4j2進行日志輸出

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="OFF">
    <appenders>

        <Console name="Console" target="SYSTEM_OUT">
            <!--只接受程序中DEBUG級別的日志進行處理-->
            <ThresholdFilter level="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="[%d{HH:mm:ss.SSS}] %-5level %class{36} %L %M - %msg%xEx%n"/>
        </Console>

        <!--處理DEBUG級別的日志，並把該日志放到logs/debug.log文件中-->
        <!--打印出DEBUG級別日志，每次大小超過size，則這size大小的日志會自動存入按年份-月份建立的文件夾下面並進行壓縮，作為存檔-->
        <RollingFile name="RollingFileDebug" fileName="./logs/debug.log"
                     filePattern="logs/$${date:yyyy-MM}/debug-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <ThresholdFilter level="DEBUG"/>
                <ThresholdFilter level="INFO" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout
                    pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="500 MB"/>
                <TimeBasedTriggeringPolicy/>
            </Policies>
        </RollingFile>

        <!--處理INFO級別的日志，並把該日志放到logs/info.log文件中-->
        <RollingFile name="RollingFileInfo" fileName="./logs/info.log"
                     filePattern="logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <!--只接受INFO級別的日志，其余的全部拒絕處理-->
                <ThresholdFilter level="INFO"/>
                <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout
                    pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="500 MB"/>
                <TimeBasedTriggeringPolicy/>
            </Policies>
        </RollingFile>

        <!--處理WARN級別的日志，並把該日志放到logs/warn.log文件中-->
        <RollingFile name="RollingFileWarn" fileName="./logs/warn.log"
                     filePattern="logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <ThresholdFilter level="WARN"/>
                <ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout
                    pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="500 MB"/>
                <TimeBasedTriggeringPolicy/>
            </Policies>
        </RollingFile>

        <!--處理error級別的日志，並把該日志放到logs/error.log文件中-->
        <RollingFile name="RollingFileError" fileName="./logs/error.log"
                     filePattern="logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log.gz">
            <ThresholdFilter level="ERROR"/>
            <PatternLayout
                    pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %class{36} %L %M - %msg%xEx%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="500 MB"/>
                <TimeBasedTriggeringPolicy/>
            </Policies>
        </RollingFile>

        <!--druid的日志記錄追加器-->
        <RollingFile name="druidSqlRollingFile" fileName="./logs/druid-sql.log"
                     filePattern="logs/$${date:yyyy-MM}/api-%d{yyyy-MM-dd}-%i.log.gz">
            <PatternLayout pattern="[%d{yyyy-MM-dd HH:mm:ss}] %-5level %L %M - %msg%xEx%n"/>
            <Policies>
                <SizeBasedTriggeringPolicy size="500 MB"/>
                <TimeBasedTriggeringPolicy/>
            </Policies>
        </RollingFile>
    </appenders>

    <loggers>
        <root level="DEBUG">
            <appender-ref ref="Console"/>
            <appender-ref ref="RollingFileInfo"/>
            <appender-ref ref="RollingFileWarn"/>
            <appender-ref ref="RollingFileError"/>
            <appender-ref ref="RollingFileDebug"/>
        </root>

        <!--記錄druid-sql的記錄-->
        <logger name="druid.sql.Statement" level="debug" additivity="false">
            <appender-ref ref="druidSqlRollingFile"/>
        </logger>
        <logger name="druid.sql.Statement" level="debug" additivity="false">
            <appender-ref ref="druidSqlRollingFile"/>
        </logger>

        <!--log4j2 自帶過濾日志-->
        <Logger name="org.apache.catalina.startup.DigesterFactory" level="error" />
        <Logger name="org.apache.catalina.util.LifecycleBase" level="error" />
        <Logger name="org.apache.coyote.http11.Http11NioProtocol" level="warn" />
        <logger name="org.apache.sshd.common.util.SecurityUtils" level="warn"/>
        <Logger name="org.apache.tomcat.util.net.NioSelectorPool" level="warn" />
        <Logger name="org.crsh.plugin" level="warn" />
        <logger name="org.crsh.ssh" level="warn"/>
        <Logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="error" />
        <Logger name="org.hibernate.validator.internal.util.Version" level="warn" />
        <logger name="org.springframework.boot.actuate.autoconfigure.CrshAutoConfiguration" level="warn"/>
        <logger name="org.springframework.boot.actuate.endpoint.jmx" level="warn"/>
        <logger name="org.thymeleaf" level="warn"/>
    </loggers>
</configuration>