Java使用logback记录日志时分级别保存文件

说明：一般情况下logback可以指定类使用什么样的级别显示输出日志，并且同一类可以指定不能级别，然后对应级别进行输出日志。

第一种配置：

<?xml version="1.0" encoding="UTF-8"?>  
<configuration>  
    <!-- 定义log 文件的 home 目录  -->
    <property name="LOG_HOME"  value="C:/Users/Administrator/Desktop/logs"></property>
 
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
        <encoder>  
            <!-- %.-1level 只显示信息级别的首字母,%-5level 左对齐显示信息级别全称 -->  
            
            <Pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] --%mdc{client} %msg%n</Pattern>  
        </encoder>  
    </appender>  
    
    <appender name="TRACE_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <encoding>UTF-8</encoding>
        <file>${LOG_HOME}/trace.log</file>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <FileNamePattern>logs/trace.%d{yyyy-MM-dd}.log</FileNamePattern>  
        </rollingPolicy>  
        <layout>  
            <pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] [%logger:%line] --%mdc{client} %msg%n</pattern>  
        </layout> 
       <!--  <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
            <level>TRACE</level>  
            <onMatch>ACCEPT</onMatch>  
            <onMismatch>DENY</onMismatch>  
           </filter>  --> 
    </appender>  
    
     <appender name="INFO_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <encoding>UTF-8</encoding>
        <file>${LOG_HOME}/info.log</file>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <FileNamePattern>logs/info.%d{yyyy-MM-dd}.log</FileNamePattern>  
        </rollingPolicy>  
        <layout>  
            <pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] [%logger:%line] --%mdc{client} %msg%n</pattern>  
        </layout>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
            <level>INFO</level>  
            <onMatch>ACCEPT</onMatch>  
            <onMismatch>DENY</onMismatch>  
           </filter>     
    </appender>  
    
      <appender name="DEBUG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <encoding>UTF-8</encoding>
        <file>${LOG_HOME}/debug.log</file>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <FileNamePattern>logs/debug.%d{yyyy-MM-dd}.log</FileNamePattern>  
        </rollingPolicy>  
        <layout>  
            <pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] [%logger:%line] --%mdc{client} %msg%n</pattern>  
        </layout> 
         <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
            <level>DEBUG</level>  
            <onMatch>ACCEPT</onMatch>  
            <onMismatch>DENY</onMismatch>  
           </filter>   
    </appender>  
    
     <appender name="WARN_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <encoding>UTF-8</encoding>
        <file>${LOG_HOME}/warn.log</file>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <FileNamePattern>logs/warn.%d{yyyy-MM-dd}.log</FileNamePattern>  
        </rollingPolicy>  
        <layout>  
            <pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] [%logger:%line] --%mdc{client} %msg%n</pattern>  
        </layout> 
         <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
            <level>WARN</level>  
            <onMatch>ACCEPT</onMatch>  
            <onMismatch>DENY</onMismatch>  
           </filter>   
    </appender>  
    
     <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <encoding>UTF-8</encoding>
        <file>${LOG_HOME}/error.log</file>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <FileNamePattern>logs/error.%d{yyyy-MM-dd}.log</FileNamePattern>  
        </rollingPolicy>  
        <layout>  
            <pattern>[%date{yyyy-MM-dd HH:mm:ss}] [%-5level] [%logger:%line] --%mdc{client} %msg%n</pattern>  
        </layout> 
         <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
            <level>ERROR</level>  
            <onMatch>ACCEPT</onMatch>  
            <onMismatch>DENY</onMismatch>  
           </filter>   
    </appender>  
    
   <!--  <logger name="com.mchange" level="INFO"/>  
    <logger name="org.springframework" level="WARN"/>  
    <logger name="java.sql.Connection" level="DEBUG"/>  
    <logger name="java.sql.ResultSet" level="INFO"/>  
    <logger name="com.boaotech.util" level="DEBUG"/>  -->
     
    <root level="TRACE">  
        <appender-ref ref="STDOUT"/>  
        <appender-ref ref="TRACE_FILE" />
           <appender-ref ref="INFO_FILE" />  
          <appender-ref ref="DEBUG_FILE" />  
         <appender-ref ref="WARN_FILE" />  
          <appender-ref ref="ERROR_FILE" />    
    </root>  
    
</configuration>

第二种配置：

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->  
    <property name="LOG_HOME" value="c:/log" />  
    <!-- 控制台输出 -->   
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
       <!-- 日志输出编码 -->  
       <Encoding>UTF-8</Encoding>   
        <layout class="ch.qos.logback.classic.PatternLayout">   
             <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--> 
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n   
            </pattern>   
        </layout>   
    </appender>   
    <!-- 按照每天生成日志文件 -->   
    <appender name="FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">   
        <Encoding>UTF-8</Encoding>   
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>${LOG_HOME}/myApp.log.%d{yyyy-MM-dd}.log</FileNamePattern>   
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>   
        <layout class="ch.qos.logback.classic.PatternLayout">  
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--> 
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n   
            </pattern>   
       </layout> 
        <!--日志文件最大的大小-->
       <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
         <MaxFileSize>10MB</MaxFileSize>
       </triggeringPolicy>
    </appender> 
   <!-- show parameters for hibernate sql 专为 Hibernate 定制 -->  
    <logger name="org.hibernate.type.descriptor.sql.BasicBinder"  level="TRACE" />  
    <logger name="org.hibernate.type.descriptor.sql.BasicExtractor"  level="DEBUG" />  
    <logger name="org.hibernate.SQL" level="DEBUG" />  
    <logger name="org.hibernate.engine.QueryParameters" level="DEBUG" />  
    <logger name="org.hibernate.engine.query.HQLQueryPlan" level="DEBUG" />  
    
    <!-- 日志输出级别 -->
    <root level="INFO">   
        <appender-ref ref="STDOUT" />   
        <appender-ref ref="FILE" />   
    </root> 
     
     <!--日志异步到数据库 -->  
    <appender name="DB" class="ch.qos.logback.classic.db.DBAppender">
        <!--日志异步到数据库 --> 
        <connectionSource class="ch.qos.logback.core.db.DriverManagerConnectionSource">
           <!--连接池 --> 
           <dataSource class="com.mchange.v2.c3p0.ComboPooledDataSource">
              <driverClass>com.mysql.jdbc.Driver</driverClass>
              <url>jdbc:mysql://127.0.0.1:3306/databaseName</url>
              <user>root</user>
              <password>root</password>
            </dataSource>
        </connectionSource>
  </appender> -->
</configuration>

参考：

http://www.cnblogs.com/dragonflyyi/p/4245250.html（以上部分内容转自此篇文章）