為了方便檢視和歸檔： 
不同包的日誌可能要放到不同的檔案中，如service層和dao層的日誌； 
不同日誌級別：除錯、資訊、警告和錯誤等也要分檔案輸出。 

一、根據包輸出，通過logger的name屬性指定不同的包  

1. 建立不同包下的兩個類：  
Java程式碼  

1. package com.john.service;  
2.   
3. @Service
     
4. public class ObligationService {  
5.     static final Logger log = LoggerFactory.getLogger(ObligationService.class);  
6.   
7.     @Resource  
8.     ObligationDao dao;  
9.       
10.     public void obligate() {  
11.         log.debug("obligate start...");  
12.         dao.queryObligations();  
13.         log.error("An error occurred during the progress");  
14.         log.debug("obligate end...");  
15.     }  
16. }  

Java程式碼  

1. package com.john.dao;  
2.   
3. @Repository  
4. public class ObligationDao {  
5.     static final Logger log = LoggerFactory.getLogger(ObligationDao.class);  
6.       
7.     public void queryObligations() {  
8.         log.debug("query obligations start...");  
9.         log.error("An error occurred during the query");  
10.         log.debug("query obligations end...");  
11.     }  
12. }  

2. 在logback(-test).xml中新增：  
Xml程式碼  

1. <appender name="serviceAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">  
2.     <file>/logs/bribery.log</file>  
3.     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
4.         <fileNamePattern>/logs/bribery-%d{yyyy-MM-dd}.log</fileNamePattern>  
5.     </rollingPolicy>  
6.     <encoder>  
7.         <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{5} - %msg%n</pattern>  
8.     </encoder>  
9. </appender>  
10.   
11. <appender name="daoAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">  
12.     <file>/logs/venality.log</file>  
13.     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
14.         <fileNamePattern>/logs/venality-%d{yyyy-MM-dd}.log</fileNamePattern>  
15.     </rollingPolicy>  
16.     <encoder>  
17.         <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{5} - %msg%n</pattern>  
18.     </encoder>  
19. </appender>  
20.   
21. <logger name="com.john.service" level="DEBUG" additivity="false">  
22.     <appender-ref ref="serviceAppender" />  
23. </logger>  
24.   
25. <logger name="com.john.dao" level="DEBUG" additivity="false">  
26.     <appender-ref ref="daoAppender" />  
27. </logger>  

3. 測試方法：  
Java程式碼  

1. @Test  
2. public void dispatchByPackageTest() {  
3.     AbstractApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");  
4.     ObligationService service = ctx.getBean(ObligationService.class);  
5.     service.obligate();  
6. }  

執行測試後， 
bribery.log： 
15:59:59.839 [main] DEBUG c.j.s.ObligationService - obligate start... 
15:59:59.844 [main] ERROR c.j.s.ObligationService - An error occurred during the progress 
15:59:59.844 [main] DEBUG c.j.s.ObligationService - obligate end... 

venality.log： 
15:59:59.844 [main] DEBUG c.j.d.ObligationDao - query obligations start... 
15:59:59.844 [main] ERROR c.j.d.ObligationDao - An error occurred during the query 
15:59:59.844 [main] DEBUG c.j.d.ObligationDao - query obligations end... 

二、根據日誌級別輸出  

這裡把所有級別為ERROR的日誌輸出到一個檔案中 

1. 修改logback(-test).xml檔案  

serviceAppender和daoAppender都加入以下 級別過濾器 ，這樣錯誤日誌就不會在bribery.log和venality.log中列印了： 
Xml程式碼  

1. <filter class="ch.qos.logback.classic.filter.LevelFilter">  
2.     <level>ERROR</level>  
3.     <onMatch>DENY</onMatch>  
4.     <onMismatch>ACCEPT</onMismatch>  
5. </filter>  

新建一個錯誤日誌的appender： 
Xml程式碼  

1. <appender name="errorAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">  
2.     <file>/logs/error.log</file>  
3.     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
4.         <fileNamePattern>/logs/venality-%d{yyyy-MM-dd}.log</fileNamePattern>  
5.     </rollingPolicy>  
6.     <encoder>  
7.         <pattern>%d{HH:mm:ss.SSS} %thread %X{invokeNo} %logger{40} %msg%n</pattern>  
8.     </encoder>  
9.     <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印錯誤日誌 -->  
10.         <level>ERROR</level>  
11.         <onMatch>ACCEPT</onMatch>  
12.         <onMismatch>DENY</onMismatch>  
13.     </filter>  
14. </appender>  

2. 執行上面的測試方法，service和dao的錯誤日誌都列印到error.log檔案中了：  
16:12:51,433 main com.john.dao.ObligationDao An error occurred during the query 

16:12:51,433 main com.john.service.ObligationService An error occurred during the progress