详解Spring Boot下使用logback 记录多个文件日志

<?xml version= "1.0" encoding= "utf-8" ?>

<configuration>

   # 下面这一行的意思是使用application.yml中的global.log-dir变量

   <springproperty scope= "context" name= "log_dir" source= "global.log-dir" defaultvalue= "./log/" />

   <!-- 追加器开始 -->

   # 这个是一个可以定义变量的appender

   <appender name= "sift" class = "ch.qos.logback.classic.sift.siftingappender" >

     # 使用 loggernamebaseddiscriminator 这个类根据当前logger获取变量

     <discriminator class = "com.utils.loggers.loggernamebaseddiscriminator" >

       <defaultvalue>general</defaultvalue>

     </discriminator>

     <sift>

       # 根据变量loggername名字生成根据日期滚动的appender

       <appender name= "file-${loggername}" class = "ch.qos.logback.core.rolling.rollingfileappender" >

         <file>

           ${log_dir}/${loggername}.log

         </file>

         <rollingpolicy class = "ch.qos.logback.core.rolling.timebasedrollingpolicy" >

           <filenamepattern>

             ${log_dir}/${loggername}.%d{yyyy-mm-dd}.log.gz

           </filenamepattern>

           <maxhistory> 15 </maxhistory>

         </rollingpolicy>

         <filter class = "ch.qos.logback.classic.filter.thresholdfilter" >

           <level>info</level>

         </filter>

         <encoder>

           <pattern>%d{hh:mm:ss.sss} %-5level - %msg%n

           </pattern>

         </encoder>

       </appender>

       <appender name= "file-error-${loggername}" class = "ch.qos.logback.core.rolling.rollingfileappender" >

         <file>${log_dir}/${loggername}.err.log</file>

         <rollingpolicy class = "ch.qos.logback.core.rolling.timebasedrollingpolicy" >

           <filenamepattern>

             ${log_dir}/${loggername}.%d{yyyy-mm-dd}.err.log.gz

           </filenamepattern>

           <maxhistory> 15 </maxhistory>

         </rollingpolicy>

         <filter class = "ch.qos.logback.classic.filter.thresholdfilter" >

           <level>error</level>

         </filter>

         <encoder>

           <pattern>%d{hh:mm:ss.sss} %-5level - %msg%n

           </pattern>

         </encoder>

       </appender>

     </sift>

   </appender>

   <!-- 追加器结束 -->

   <!-- 日志开始 -->

   <logger name= "com.some.service" level= "info" additivity= "false" >

     <appender-ref ref= "sift" />

   </logger>

   <!-- 日志结束 -->

</configuration>

package com.utils.loggers;

import ch.qos.logback.classic.spi.iloggingevent;

import ch.qos.logback.core.sift.abstractdiscriminator;

public class loggernamebaseddiscriminator extends abstractdiscriminator<iloggingevent> {

   private static final string key = "loggername" ;

   private string defaultvalue;

   public string getdefaultvalue() {

     return defaultvalue;

   }

   public void setdefaultvalue(string defaultvalue) {

     this .defaultvalue = defaultvalue;

   }

   # 这就是之所以xml里面可以引用loggername变量的原因

   public string getkey() {

     return key;

   }

   public void setkey() {

     throw new unsupportedoperationexception( "key not settable. using " + key);

   }

   public string getdiscriminatingvalue(iloggingevent e) {

     string loggername = e.getloggername();

     if (loggername == null )

       return defaultvalue;

     else {

       string[] split = loggername.split( "\\." );

       return split[split.length - 1 ];

     }

   }

}

<?xml version= "1.0" encoding= "utf-8" ?>

<configuration>

   <springproperty scope= "context" name= "log_dir" source= "global.log-dir" defaultvalue= "./log/" />

   <!-- 追加器开始 -->

   <appender name= "sift" class = "ch.qos.logback.classic.sift.siftingappender" >

     <discriminator class = "com.utils.loggers.loggernamebaseddiscriminator" >

     </discriminator>

     <sift>

       <appender name= "file-${loggername}"

            class = "ch.qos.logback.core.rolling.rollingfileappender" >

         <file>${log_dir}/${loggername}.log</file>

         <rollingpolicy

             class = "ch.qos.logback.core.rolling.timebasedrollingpolicy" >

           <filenamepattern>

             ${log_dir}/${loggername}.%d{yyyy-mm-dd}.log

           </filenamepattern>

           <maxhistory> 15 </maxhistory>

         </rollingpolicy>

         <filter class = "ch.qos.logback.classic.filter.thresholdfilter" >

           <level>info</level>

         </filter>

         <encoder>

           <pattern>%d{hh:mm:ss.sss} %-5level - %msg%n

           </pattern>

         </encoder>

       </appender>

     </sift>

   </appender>

   <appender name= "sift-err" class = "ch.qos.logback.classic.sift.siftingappender" >

     <discriminator class = "com.infervision.utils.loggers.loggernamebaseddiscriminator" >

     </discriminator>

     <sift>

       <appender name= "file-error-${loggername}" class = "ch.qos.logback.core.rolling.rollingfileappender" >

         <file>${log_dir}/${loggername}.err.log</file>

         <rollingpolicy class = "ch.qos.logback.core.rolling.timebasedrollingpolicy" >

           <filenamepattern>

             ${log_dir}/${loggername}.%d{yyyy-mm-dd}.err.log

           </filenamepattern>

           <maxhistory> 15 </maxhistory>

           <totalsizecap>50mb</totalsizecap>

         </rollingpolicy>

         <filter class = "ch.qos.logback.classic.filter.thresholdfilter" >

           <level>error</level>

         </filter>

         <encoder>

           <pattern>%d{hh:mm:ss.sss} %-5level - %msg%n

           </pattern>

         </encoder>

       </appender>

     </sift>

   </appender>

   <!-- 异步输出 -->

   <appender name = "async" class = "ch.qos.logback.classic.asyncappender" >

     <!-- 不丢失日志.默认的,如果队列的 80 %已满,则会丢弃tract、debug、info级别的日志 -->

     <discardingthreshold > 0 </discardingthreshold>

     <!-- 更改默认的队列的深度,该值会影响性能.默认值为 256 -->

     <queuesize> 512 </queuesize>

     <!-- 添加附加的appender,最多只能添加一个 -->

     <appender-ref ref = "sift" />

   </appender>

   <!-- 异步输出 -->

   <appender name = "async-err" class = "ch.qos.logback.classic.asyncappender" >

     <!-- 不丢失日志.默认的,如果队列的 80 %已满,则会丢弃tract、debug、info级别的日志 -->

     <discardingthreshold > 0 </discardingthreshold>

     <!-- 更改默认的队列的深度,该值会影响性能.默认值为 256 -->

     <queuesize> 512 </queuesize>

     <!-- 添加附加的appender,最多只能添加一个 -->

     <appender-ref ref = "sift-err" />

   </appender>

   <!-- 追加器结束 -->

   <!-- 日志开始 -->

   <logger name= "com.some.service" level= "info" additivity= "false" >

     <appender-ref ref= "async" />

   </logger>

   <!-- 日志结束 -->

</configuration>