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logback在系统中的使用.md

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#开发服务器、测试服务器、正式服务器各个项目日志打印及保存路径

#1.添加应用服务器过滤 为配合日志记录明细及内容需要在web项目中的web.xml中添加一下过滤器：

   <filter>
	<description>设置日志上下文过滤器</description>
	<filter-name>slcf</filter-name>
	<filter-class>com.huaying.common.web.filter.log.SetLoggingContextFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>slcf</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

该过滤器抄袭阿里日志框架记录详细的访问URL有重要价值

2. 声明日志存储路径

日志保存根目录：/program/logs/[mall|pay|sys]

3.日志配置基础配置文件

日志基础配置文件(logback.properties) 内容如下:

#日志存储路径
LOG_PATH=D/program/logs/mall/mall-sso
smtpHost=smtp.163.com  
smtpPort=25  
[email protected]  
password=XXXXXX  
SSL=false  
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]  
[email protected]  
email_subject=\u3010Error\u3011\: %logger  
localhost=www.huaqinwang.com
#日志项目名称雷同项目名称 唯一
contextName=mall-sso

#4.定义日志appender

4.1 定义出错发送邮件appender

   <configuration>
<property resource="logs/logback.properties" />
<contextName>${contextName}</contextName>

<appender name="EMAIL" class="ch.qos.logback.classic.net.SMTPAppender">  
    <smtpHost>${smtpHost}</smtpHost>  
    <smtpPort>${smtpPort}</smtpPort>  
    <username>${username}</username>  
    <password>${password}</password>
    <localhost>${localhost}</localhost>  
    <SSL>${SSL}</SSL>  
    <asynchronousSending>true</asynchronousSending>  
    <to>${email_to}</to>  
    <from>${email_from}</from>  
    <subject>${email_subject}</subject>  
    <layout class="ch.qos.logback.classic.html.HTMLLayout" >  
        <!-- <pattern>%date%level%thread%logger{0}%line%message</pattern>   -->
        <pattern>%date%level%thread%logger{0}%line%message%-4r [%d{yyyy-MM-dd HH:mm:ss}] - %X{remoteAddr} %X{requestURIWithQueryString} %X{referrer} %X{userAgent} %X{cookie.MALL_JSESSIONID_SID} %C:%L - %m%n
        </pattern>
        
    </layout>  
    <filter class="ch.qos.logback.core.filter.EvaluatorFilter">    
        <evaluator class="ch.qos.logback.classic.boolex.JaninoEventEvaluator">  
            <expression>  <!-- &amp;&amp; null != throwable -->
                if(level > WARN ) {  
                    return true;  
                }  
                return false;  
            </expression>    
        </evaluator> 
        <onMatch>ACCEPT</onMatch>    
        <onMismatch>DENY</onMismatch>      
    </filter>  
</appender>

4.2 定义不同包日志保存到不同的日志文件中

如：把所有的dubbo的日志存储到huaying-dubbo-info.log日志文件中：

4.2.1 定义特定的appender

<appender name="huayingDubboAppender"
	class="ch.qos.logback.core.rolling.RollingFileAppender">
	<file>${LOG_PATH}/huaying-dubbo-info.log</file>
	<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
		<fileNamePattern>${LOG_PATH}/huaying-dubbo-info-%d{yyyy-MM-dd}.%i.log
		</fileNamePattern>
		<timeBasedFileNamingAndTriggeringPolicy
			class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
			<maxFileSize>50MB</maxFileSize>
		</timeBasedFileNamingAndTriggeringPolicy>
	</rollingPolicy>
	<append>true</append>
	<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
		<pattern>%-5p [%d][%mdc{mdc_accNo}] %C:%L - %m %n</pattern>
		<charset>utf-8</charset>
	</encoder>
	<!-- 此日志文件只记录info级别，不记录大于info级别的日志 -->
	<filter class="ch.qos.logback.classic.filter.LevelFilter">
		<level>INFO</level>
		<onMatch>ACCEPT</onMatch>
		<onMismatch>DENY</onMismatch>
	</filter>
</appender>

4.2.2 定义logger

<logger name="com.huaying.common.web.dubbo" level="INFO" additivity="false">  
    <appender-ref ref="huayingDubboAppender" />  
</logger>

4.3 定义其他日志级别的appender

原来配置文件已经有无需再次添加

5.定义日志 logger

可以使用如下定义：

6.将appender添加到 root配置项中

<root   >
	<appender-ref ref="EMAIL" level="ERROR"/>  		
</root>