前言 

bootstrap.yml（bootstrap.properties）與application.yml（application.properties）執(zhí)行順序

• bootstrap.yml（bootstrap.properties）用來程序引導(dǎo)時執(zhí)行，應(yīng)用于更加早期配置信息讀取，如可以使用來配置application.yml中使用到參數(shù)等
• application.yml（application.properties) 應(yīng)用程序特有配置信息，可以用來配置后續(xù)各個模塊中需使用的公共參數(shù)等。
• bootstrap.yml 先于 application.yml 加載

1.第一種方法

直接寫在application.yml里面，也能適配環(huán)境修改，但是只能使用默認(rèn)一些策略，比如10M切分一個文件。

#日志配置
logging:
? level:
? ? root: INFO
? file: /home/xxx/logs/xxx.log

2.第二種方法

logback-spring.xml

<?xml version="1.0" encoding="utf-8"?>
<!--  Level	描述
     ALL	各級包括自定義級別
     ERROR	錯誤事件可能仍然允許應(yīng)用程序繼續(xù)運(yùn)行
     FATAL	指定非常嚴(yán)重的錯誤事件，這可能導(dǎo)致應(yīng)用程序中止
     INFO	指定能夠突出在粗粒度級別的應(yīng)用程序運(yùn)行情況的信息的消息
     OFF	這是最高等級，為了關(guān)閉日志記錄
    TRACE	指定細(xì)粒度比DEBUG更低的信息事件
    WARN	指定具有潛在危害的情況
    scan:當(dāng)此屬性設(shè)置為true時，配置文件如果發(fā)生改變，將會被重新加載，默認(rèn)值為true。
    scanPeriod:設(shè)置監(jiān)測配置文件是否有修改的時間間隔，如果沒有給出時間單位，默認(rèn)單位是毫秒。當(dāng)scan為true時，此屬性生效。默認(rèn)的時間間隔為1分鐘。
    debug:當(dāng)此屬性設(shè)置為true時，將打印出logback內(nèi)部日志信息，實時查看logback運(yùn)行狀態(tài)。默認(rèn)值為false。-->
<configuration debug="true" scan="true" scanPeriod="30 seconds">
    <!-- 存放日志文件路徑  該 <springProperty> 標(biāo)簽允許我們從Spring中顯示屬性-->
    <springProperty scope="context" name="logHome" source="log.path"/>
    <!-- ch.qos.logback.core.ConsoleAppender 控制臺輸出 -->
    <appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <!--格式化輸出：%d表示日期，%thread表示線程名，%-5level：級別從左顯示5個字符寬度%msg：日志消息，%n是換行符 -->
            <pattern>%d [%thread] %-5level %logger{36} - %msg%n</pattern>
        </layout>
    </appender>
    <!-- INFO級別 -->
    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 級別過濾器：如果只是想要INFO級別的日志，只是過濾info還是會輸出ERROR日志，因為ERROR的級別高，
        所以我們使用下面的策略，可以避免輸出ERROR的日志-->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <!-- 過濾ERROR -->
            <level>ERROR</level>
            <!-- 匹配到就禁止 -->
            <onMatch>DENY</onMatch>
            <!-- 沒有匹配到就允許 -->
            <onMismatch>ACCEPT</onMismatch>
        </filter>
        <encoder>
            <!--格式化輸出：%d表示日期，%thread表示線程名，%-5level：級別從左顯示5個字符寬度%msg：日志消息，%n是換行符 -->
            <pattern>%d [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
        <!--日志名稱，如果沒有File 屬性，那么只會使用FileNamePattern的文件路徑規(guī)則,如果同時有<File>和<FileNamePattern>，
        那么當(dāng)天日志是<File>，明天會自動把今天的日志改名為今天的日期。即<File> 的日志都是當(dāng)天的。-->
        <!-- 根據(jù)時間來制定滾動策略 TimeBasedRollingPolicy-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>${logHome}/%d/info/info.log</fileNamePattern>
            <!--保存最大天數(shù)-->
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>
    <!-- ERROR級別-->
    <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--如果只是想要 ERROR 級別的日志，那么需要過濾一下，默認(rèn)是 INFO 級別的，ThresholdFilter-->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <!--格式化輸出：%d表示日期，%thread表示線程名，%-5level：級別從左顯示5個字符寬度%msg：日志消息，%n是換行符 -->
            <pattern>%d [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
        <!-- 基于規(guī)模和時間的滾動策略 SizeAndTimeBasedRollingPolicy-->
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>${logHome}/%d/error/error.%i.log</fileNamePattern>
            <!--保存最大天數(shù)-->
            <maxHistory>30</maxHistory>
            <!--文件最大值-->
            <maxFileSize>2MB</maxFileSize>
            <!--總大小上限-->
            <totalSizeCap>10MB</totalSizeCap>
        </rollingPolicy>
    </appender>
    <root level="info">
        <appender-ref ref="consoleLog"/>
        <appender-ref ref="fileInfoLog"/>
        <appender-ref ref="fileErrorLog"/>
    </root>
</configuration>

一開始在application.yml 配置了log路徑，但是springProperty 標(biāo)簽里面并沒有獲取到，會見在jar包存放的文件夾下，新建logHome_IS_UNDEFINED/%d/info/info.log，看下啟動日志（一部分）：

13:44:32,739 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@992086987 - No compression will be used
13:44:32,742 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@992086987 - Will use the pattern logHome_IS_UNDEFINED/%d/info/info.log for the active file
13:44:32,747 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'logHome_IS_UNDEFINED/%d/info/info.log'.
13:44:32,748 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
13:44:32,752 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Tue Aug 21 13:44:32 CST 2018
13:44:32,753 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileInfoLog] - Active log file name: logHome_IS_UNDEFINED/2018-08-21/info/info.log
13:44:32,753 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileInfoLog] - File property is set to [null]
13:44:32,757 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
13:44:32,757 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [fileErrorLog]
13:44:32,758 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
13:44:32,763 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@737104370 - Archive files will be limited to [2 MB] each.
13:44:32,764 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@737104370 - No compression will be used
13:44:32,764 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@737104370 - Will use the pattern logHome_IS_UNDEFINED/%d/error/error.%i.log for the active file
13:44:32,765 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@30f5a68a - The date pattern is 'yyyy-MM-dd' from file name pattern 'logHome_IS_UNDEFINED/%d/error/error.%i.log'.

所以我在bootstrap.yml配置log.path來解決這個問題。

log:
  path: F:/logs/local-preferential
---
spring:
  profiles: test
log:
    path: /home/xxx-test/logs
---
spring:
  profiles: prod
log:
  path: /home/xxx/logs

啟動打印log配置日志（一部分）

13:43:03,375 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@224192895 - No compression will be used
13:43:03,376 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@224192895 - Will use the pattern F:/logs/local-preferential/%d/info/info.log for the active file
13:43:03,377 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'F:/logs/local-preferential/%d/info/info.log'.
13:43:03,377 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
13:43:03,377 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Tue Aug 21 13:43:03 CST 2018
13:43:03,377 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileInfoLog] - Active log file name: F:/logs/local-preferential/2018-08-21/info/info.log
13:43:03,378 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileInfoLog] - File property is set to [null]
13:43:03,378 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
13:43:03,378 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [fileErrorLog]
13:43:03,379 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
13:43:03,381 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@1883788127 - Archive files will be limited to [2 MB] each.
13:43:03,381 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@1883788127 - No compression will be used
13:43:03,382 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@1883788127 - Will use the pattern F:/logs/local-preferential/%d/error/error.%i.log for the active file
13:43:03,382 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@e3994ef - The date pattern is 'yyyy-MM-dd' from file name pattern 'F:/logs/local-preferential/%d/error/error.%i.log'.

總結(jié)

以上為個人經(jīng)驗，希望能給大家一個參考，也希望大家多多支持腳本之家。

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