Use MDC to add user or tracking code to logs __MDC

Log4j.rootlogger=error,console

Log4j.appender.console=org.apache.log4j.consoleappender
Log4j.appender.console.layout=org.apache.log4j.patternlayout
log4j.appender.console.layout.conversionpattern=%d [%t]%-5p-%c#%m%x-%m (%r ms)%n

Log4j.logger.com.company.project=debug

#SqlMap Logging configuration ...
Log4j.logger.com.ibatis=debug
Log4j.logger.com.ibatis.common.jdbc.simpledatasource=debug
Log4j.logger.com.ibatis.sqlmap.engine.cache.cachemodel=debug
Log4j.logger.com.ibatis.sqlmap.engine.impl.sqlmapclientimpl=debug
Log4j.logger.com.ibatis.sqlmap.engine.builder.xml.sqlmapparser=debug
Log4j.logger.com.ibatis.common.util.stopwatch=debug
Log4j.logger.java.sql.connection=debug
Log4j.logger.java.sql.statement=debug
Log4j.logger.java.sql.preparedstatement=debug
Log4j.logger.java.sql.resultset=debug

Log4j.logger.org.apache.struts.action.requestprocessor=error
#log4j. Logger.org.apache.commons.beanutils.propertyutils=debug
#log4j. Logger.org.apache.commons.beanutils.beanutils=debug
#log4j. Logger.org.tuckey.web.filters.urlrewrite.urlrewritefilter=debug
#log4j. Logger.org.apache.struts.action=debug
#log4j. Logger.org.apache.commons.beanutils=debug
#log4j. Logger.org.springframework.orm.ibatis=debug
#log4j. Logger.org.springframework.jdbc=debug

How to use log4j to record the operator's login ID:When logging, we may have this requirement, for each record in addition to know the log information, but also the current logged-in user information. Can: Use the log4j MDC to solve this problem.
1, through the filter or by itself in the action through the Command Mdc.put ("UserId", Default_userid), set the value to the MDC. 2, the user-set value is extracted from [%x{userid}] in the log4j configuration file and exported to the log, as follows log4j.appender.layout.conversionpattern=%d [%t]%-5p-%c#%m%x-%m (%r ms)%n [%x{userid}]

Slf4j

When the service enters

Mdc.put ("Tracenum", Costlogtrackdto.gettrackno ());

When the service exits

Mdc.remove ("Tracenum");

Log configuration

<?xml version= "1.0" encoding= "UTF-8"?>
<configuration debug= "false" >
<property name= "Log.base" value= "."/>
<appender name= "Connect.stdout" class= "Ch.qos.logback.core.ConsoleAppender" >
<encoder charset= "UTF-8" > <!--encoder can specify the character set, which is meaningful for Chinese output-->
<pattern>%d{yyyy-mm-dd HH:mm:ss. SSS} [%level] [%x{tracenum}] [%logger:%line]-%msg%n
</pattern>
</encoder>
</appender>
<appender name= "Connect.file"
class= "Ch.qos.logback.core.rolling.RollingFileAppender" >
<file>log/connect.log</file>
<filter class= "Ch.qos.logback.classic.filter.ThresholdFilter" >
<level>DEBUG</level>
</filter>
<rollingpolicy class= "Ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
<fileNamePattern>log/connect.log.%i</fileNamePattern>
<minIndex>1</minIndex>
<maxIndex>10</maxIndex>
</rollingPolicy>
<triggeringpolicy
class= "Ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy" >
<maxFileSize>50MB</maxFileSize>
</triggeringPolicy>
<encoder charset= "UTF-8" >
<pattern>%d{yyyy-mm-dd HH:mm:ss. SSS} [%level] [%x{tracenum}] [%logger:%line]-%msg%n</pattern>
</encoder>
</appender>
<appender name= "Connect.exception.file" class= "Ch.qos.logback.core.rolling.RollingFileAppender" >
<file>log/connectException.log</file>
<filter class= "Ch.qos.logback.classic.filter.ThresholdFilter" >
<level>WARN</level>
</filter>
<rollingpolicy class= "Ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
<fileNamePattern>log/connectException.log.%i</fileNamePattern>
<minIndex>1</minIndex>
<maxIndex>10</maxIndex>
</rollingPolicy>
<triggeringpolicy
class= "Ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy" >
<maxFileSize>50MB</maxFileSize>
</triggeringPolicy>
<encoder charset= "UTF-8" >
<pattern>%d{yyyy-mm-dd HH:mm:ss. SSS} [%level] [%x{tracenum}] [%logger:%l]-%msg%n</pattern>
</encoder>
</appender>
<appender name= "Eaibf.file" class= "Ch.qos.logback.core.rolling.RollingFileAppender" >
<file>log/eaibapi.log</file>
<filter class= "Ch.qos.logback.classic.filter.ThresholdFilter" >
<level>DEBUG</level>
</filter>>
<rollingpolicy class= "Ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
<fileNamePattern>log/eaibapi.log.%i</fileNamePattern>
<minIndex>1</minIndex>
<maxIndex>12</maxIndex>
</rollingPolicy>
<triggeringpolicy class= "Ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy" >
<maxFileSize>50MB</maxFileSize>
</triggeringPolicy>
<encoder charset= "UTF-8" >
<pattern>%d{yyyy-mm-dd HH:mm:ss. SSS} [%level][%x{tracenum}][%logger]-%msg%n</pattern>
</encoder>
</appender>

<appender name= "Cos_wtc.file"
class= "Ch.qos.logback.core.rolling.RollingFileAppender" >
<file>log/cos_wtc.log</file>
<filter class= "Ch.qos.logback.classic.filter.ThresholdFilter" >
<level>DEBUG</level>
</filter>
<rollingpolicy class= "Ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
<fileNamePattern>log/cos_wtc.log.%i</fileNamePattern>
<minIndex>1</minIndex>
<maxIndex>10</maxIndex>
</rollingPolicy>
<triggeringpolicy
class= "Ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy" >
<maxFileSize>50MB</maxFileSize>
</triggeringPolicy>
<encoder charset= "UTF-8" >
<pattern>%d{yyyy-mm-dd HH:mm:ss. SSS} [%level] [%x{tracenum}] [%logger]-%msg%n</pattern>
</encoder>
</appender>
<logger name= "Com.bizprocess.main.cosh.handler" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Connect.file"/>
</logger>
<logger name= "Com.common.eaib.handler" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Connect.file"/>
</logger>
<logger name= "com.eai.security" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Eaibf.file"/>
</logger>
<logger name= "Com.eai.api.EAIBDataProcessor" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Eaibf.file"/>
</logger>
<logger name= "Com.eai.pack" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Eaibf.file"/>
</logger>
<logger name= "Java.sql.PreparedStatement" additivity= "false" >
<level value= "WARN"/>
</logger>
<logger name= "Java.sql.Connection" additivity= "false" >
<level value= "WARN"/>
</logger>
<logger name= "Java.sql.Statement" additivity= "false" >
<level value= "WARN"/>
</logger>
<logger name= "Org.springframework" additivity= "false" >
<level value= "WARN"/>
</logger>

<!--COS_WTC log output-->
<logger name= "COM.WTC.EJB" level= "DEBUG" additivity= "false" >
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Cos_wtc.file"/>
</logger>

<!--output COS system log-->
<logger name= "Com.connect" level= "INFO" additivity= "false" >
<!--make sure to remove the connect.stdout configuration, otherwise the log will hit the console-->
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Connect.file"/>
<appender-ref ref= "Connect.exception.file"/>
</logger>

<!--output COS system log-->
<logger name= "com" level= "INFO" additivity= "false" >
<!--make sure to remove the connect.stdout configuration, otherwise the log will hit the console-->
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Connect.file"/>
<appender-ref ref= "Connect.exception.file"/>
</logger>
<root>
<level value= "INFO"/>
<!--make sure to remove the connect.stdout configuration, otherwise the log will hit the console-->
<appender-ref ref= "Connect.stdout"/>
<appender-ref ref= "Connect.file"/>
<appender-ref ref= "Connect.exception.file"/>
</root>
</configuration>