使用logback-spring.xml配置日志

秒速五厘米 2022-12-13 01:22 231阅读 0赞

## 完整配置如下（有bug，后面解决，并且后面逐一分析): ##

<?xml version="1.0" encoding="UTF-8" ?>
    
    <configuration>
    
        <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
            <layout class="ch.qos.logback.classic.PatternLayout">
                <pattern>
                    
                    %d - %msg%n
                </pattern>
            </layout>
        </appender>
    
        <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>ERROR</level>
                <onMatch>DENY</onMatch>
                <onMismatch>ACCEPT</onMismatch>
            </filter>
            <encoder>
                <pattern>
                    %msg%n
                </pattern>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>F:/project/sell/log/info.%d.log</fileNamePattern>
            </rollingPolicy>
        </appender>
    
    
        <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
                <level>ERROR</level>
            </filter>
            <encoder>
                <pattern>
                    %msg%n
                </pattern>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>F:/project/sell/log/error.%d.log</fileNamePattern>
            </rollingPolicy>
        </appender>
    
        <root level="info">
            <appender-ref ref="consoleLog" />
            <appender-ref ref="fileInfoLog" />
            <appender-ref ref="fileErrorLog" />
        </root>
    
    </configuration>

### 首先解析第一部分consoleLog: ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center]

##### 要想这个配置起效果,就要启用这个appender,那么我们该如果启用这个appender呢?只需要如下配置即可 #####

后面的也相同,都是在这样配置启用,后面就不多提了

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 1]

#### 控制台的运行效果: ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 2]

## 现在我们解析第二部分fileInfoLog ##

<appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>ERROR</level>
                <onMatch>DENY</onMatch>
                <onMismatch>ACCEPT</onMismatch>
            </filter>
            <encoder>
                <pattern>
                    %msg%n
                </pattern>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>F:/project/sell/log/info.%d.log</fileNamePattern>
            </rollingPolicy>
        </appender>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 3]

## 最后是fileErrorLog ##

跟上面的fileInfoLog大同小异,滚动策略都是一样的,只是改了一个后面的文件名称,改了过滤器的类

上面用的是`ch.qos.logback.classic.filter.LevelFilter`这个类

而这里用的是`ch.qos.logback.classic.filter.ThresholdFilter`这个类

那有人会问了,这两个类有什么区别呢?

ThresholdFilter这个类,是只输出指定级别的日志,如我们配置的

<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>ERROR</level>
    </filter>

表示只拦截error级别的日志信息.如果我们只想要输出,error级别的日志是没有问题的,error是级别最高的,所以只输出error的信息.

但如果用这个配置,拦截info级别的日志,就会出现问题了,因为info是中间级别的,不是最高级别,如果用这个拦截了info,除了输出info级别的日志信息外,还会输出warn级别和error级别,两个比它高的级别的日志.所以不能会这个类来配置info级别的file文件

那要怎么样才可能让一个文件只输出info级别的日志信息呢?

那就要用到下面这个类了LevelFilter.

LevelFilter这个类,要配合onMatch标签,如果该标签中是DENY则,说明拦截该标签级别,onMismatch标签是ACCEPT,则说明,没抓取到上面lever级别的日志,就accept,即放行.

查看源码,可以看到有三种FilterReply可以选择DENY、NEUTRAL、ACCEPT.

第一个是禁止,很容易理解

第二个是中立,就是忽略当前规则,进入下一条规则

第三个是接受、处理,被当前规则所接受、处理

![在这里插入图片描述][20201008220126307.png_pic_center]

<appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <pattern>
                %msg%n
            </pattern>
        </encoder>
        
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <fileNamePattern>F:/project/sell/log/error.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 4]

最后纠错一下第二部分是有bug的

如果只想要输出info级别的日志,像上面那样配置,是只过滤了error级别的日志信息,warn级别的日志并没有过滤掉,我这边做一下修改(后面发现的,现在做一下补充修改)

\#\#fileInfoLog

<appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder>
            <pattern>
                %d - %msg%n
            </pattern>
        </encoder>
        
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <fileNamePattern>F:/project/sell/log/info.%d.log</fileNamePattern>
        </rollingPolicy>
    </appender>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 5]

这样就可以了!!!

# 最终版logback-spring.xml（ｂｕｇ修复）: #

<?xml version="1.0" encoding="UTF-8" ?>
    
    <configuration>
    
        <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
            <layout class="ch.qos.logback.classic.PatternLayout">
                <pattern>
                    
                    %d - %msg%n
                </pattern>
            </layout>
        </appender>
    
        <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>INFO</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
            <encoder>
                <pattern>
                    %d - %msg%n
                </pattern>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>F:/project/sell/log/info.%d.log</fileNamePattern>
            </rollingPolicy>
        </appender>
    
    
        <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
                <level>ERROR</level>
            </filter>
            <encoder>
                <pattern>
                    %d - %msg%n
                </pattern>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>F:/project/sell/log/error.%d.log</fileNamePattern>
            </rollingPolicy>
        </appender>
    
        <root level="info">
            <appender-ref ref="consoleLog" />
            <appender-ref ref="fileInfoLog" />
            <appender-ref ref="fileErrorLog" />
        </root>
    
    </configuration>

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[20201008220126307.png_pic_center]: /images/20221123/1c9879898122432db096c2974c6d725b.png
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