在springboot应用程序中按大小或日期滚动日志文件

心已赠人 2023-09-25 13:16 143阅读 0赞

### 1. 本文的目的 ###

我将演示如何在 springboot 应用程序中按日期或大小滚动日志文件。

### 2. 环境 ###

*  弹簧靴 1.x 和 2.x

### 3. 在 springboot 应用程序中滚动日志文件 ###

#### 3.1 春季的默认日志记录配置是什么？ ####

默认情况下，springboot 使用logback作为默认记录器，但是如果您仅使用application.properties来配置日志记录，则存在一些限制：

logging.level.=ERROR  # this is the root logging level for all packages.
    logging.level.com.test.sb1jt=DEBUG # this is the project-specific package logging level configuration
    logging.file=springboot-logger.log # this is the logging target file

您可以看到，我们可以配置根日志记录级别和包日志记录级别，但是如果要按日期或大小滚动日志文件，该怎么办？

#### 3.2 将登录配置文件添加到项目中 ####

当 springboot 类路径中的文件具有以下名称之一时，Spring 引导将自动通过默认配置加载它：

*  logback-spring.xml
 *  logback.xml
 *  logback-spring.groovy
 *  logback.groovy

建议使用倒数弹簧.xml。

#### 3.3 按大小演示滚动日志文件 ####

我们可以在 src/main/res/logback-spring 中定义滚动策略.xml如下所示：

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
    
        
        <property name="LOGS" value="./logs" /> 
    
        
        <appender name="Console"
                  class="ch.qos.logback.core.ConsoleAppender">
            <layout class="ch.qos.logback.classic.PatternLayout">
                <Pattern>
                    %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
                </Pattern>
            </layout>
        </appender>
    
        <appender name="RollingFileBySize" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${LOGS}/spring-boot-loggerbysize.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
                
                <fileNamePattern>${LOGS}/spring-boot-loggerbysize-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                
                <maxFileSize>1MB</maxFileSize>
                <maxHistory>6</maxHistory>
                <totalSizeCap>3MB</totalSizeCap>
            </rollingPolicy>
            <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
                <Pattern>%d %p %C{1.} [%t] %m%n</Pattern>
            </encoder>
        </appender>
    
        
        <root level="error">
            <appender-ref ref="RollingFileByDate" />
            <appender-ref ref="Console" />
        </root>
    
        
        <logger name="com.test" level="trace" additivity="false">
            <appender-ref ref="RollingFileByDate" />
            <appender-ref ref="Console" />
        </logger>
    
    </configuration>

然后，您可以通过运行打印大量日志的无限循环来进行测试。然后你会得到这些文件：

-rw-r--r--  1 zzz  staff   1.0M May 25 18:21 spring-boot-loggerbysize-2019-05-25.0.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:21 spring-boot-loggerbysize-2019-05-25.1.log
    -rw-r--r--  1 zzz  staff   317K May 25 18:22 spring-boot-loggerbysize.log

#### 3.4 按日期演示滚动日志文件 ####

我们可以在 src/main/res/logback-spring 中定义日期滚动策略.xml如下所示：

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
    
        
        <property name="LOGS" value="./logs" /> 
    
        
        <appender name="Console"
                  class="ch.qos.logback.core.ConsoleAppender">
            <layout class="ch.qos.logback.classic.PatternLayout">
                <Pattern>
                    %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable
                </Pattern>
            </layout>
        </appender>
    
        <appender name="RollingFileByDate"
                  class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${LOGS}/spring-boot-loggerbyate.log</file>
            <encoder
                    class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
                <Pattern>%d %p %C{1.} [%t] %m%n</Pattern>
            </encoder>
    
            <rollingPolicy
                    class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>${LOGS}/spring-boot-loggerbydate-%d{yyyy-MM-dd}.%i.log
                </fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy
                        class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>1MB</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
            </rollingPolicy>
        </appender>
    
        
        <root level="error">
            <appender-ref ref="RollingFileByDate" />
            <appender-ref ref="Console" />
        </root>
    
        
        <logger name="com.test" level="trace" additivity="false">
            <appender-ref ref="RollingFileByDate" />
            <appender-ref ref="Console" />
        </logger>
    
    </configuration>

Then you can test by running a infinite loop which print a lot of logs. Then you would get these files:

-rw-r--r--  1 zzz  staff   393K May 25 18:34 spring-boot-loggerbyate.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:31 spring-boot-loggerbydate-2019-05-25.0.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:31 spring-boot-loggerbydate-2019-05-25.1.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:31 spring-boot-loggerbydate-2019-05-25.2.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:32 spring-boot-loggerbydate-2019-05-25.3.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:32 spring-boot-loggerbydate-2019-05-25.4.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:32 spring-boot-loggerbydate-2019-05-25.5.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:33 spring-boot-loggerbydate-2019-05-25.6.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:33 spring-boot-loggerbydate-2019-05-25.7.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:33 spring-boot-loggerbydate-2019-05-25.8.log
    -rw-r--r--  1 zzz  staff   1.0M May 25 18:34 spring-boot-loggerbydate-2019-05-25.9.log

### 4. 结论 ###

可以通过阅读日志日志记录追加程序配置来获取有关回[日志追加程序][Link 1]的详细信息。

*  [春季靴子采访问答系列1][1]
 *  [春季靴子采访问答系列2][2]
 *  [春季靴子采访问答系列3][3]
 *  [春季靴子采访问答系列4][4]

[Link 1]: https://logback.qos.ch/manual/appenders.html
[1]: https://www.bswen.com/2019/05/springboot-springboot-interview-questions-and-answers-series-1.html
[2]: https://www.bswen.com/2019/05/springboot-springboot-interview-questions-and-answers-series-2.html
[3]: https://www.bswen.com/2019/05/springboot-springboot-interview-questions-and-answers-series-3.html
[4]: https://www.bswen.com/2019/05/springboot-springboot-interview-questions-and-answers-series-4.html