please go through following....
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.
classic.PatternLayout">
<Pattern>%d %p %c - %m%n</Pattern>
</layout>
</appender>
<!-- -->
<!-- Declare the SMTPAppender -->
<!-- -->
<appender name="EMAIL" class="ch.qos.logback.
classic.net.SMTPAppender">
<SMTPHost>smtp.gmail.com</SMTPHost>
<To>
[email protected]</To>
<From>
[email protected]</From>
<Subject>ERROR: %logger{20} - %m</Subject>
<Username>******</Username>
<Password>******</Password>
<layout class="ch.qos.logback.
classic.PatternLayout">
<Pattern>%date %-5level %logger{35} - %message%n</Pattern>
</layout>
</appender>
<appender name="R" class="ch.qos.logback.core.rolling.RollingFileAppender">
<!--See also http://logback.qos.ch/manual/appenders.html#RollingFileAppender-->
<File>example.log</File>
<layout class="ch.qos.logback.
classic.PatternLayout">
<Pattern>%d %p - %m%n</Pattern>
</layout>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<maxIndex>4</maxIndex>
<FileNamePattern>example.log.%i</FileNamePattern>
</rollingPolicy>
<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>500KB</MaxFileSize>
</triggeringPolicy>
</appender>
<logger name="org.springframework" level="WARN"/>
<logger name="org.springframework.jdbc.core.JdbcTemplate" level="WARN"/>
<logger name="org.springframework.jdbc.core.StatementCreatorUtils" level="WARN"/>
<logger name="org.springframework.security.web.FilterChainProxy" level="WARN"/>
<logger name="com.logicwind" level="INFO"/>
<logger name="performance" level="INFO"/>
<!--<logger name="org.apache.struts2" level="DEBUG"/>
--
--
</root>
