springboot程序logback日志基本配置，多個包不同日志級別輸入到文件中

日志是程序中必不可少的內容。依據(jù)日志我們可以有效診斷程序bug，統(tǒng)計用戶訪問和各主要功能的使用頻率時間段等信息。因此我們會需要不同package使用不同的日志級別，以及不同業(yè)務的日志輸出到不同的文件。下面本文簡要概述如何使用logback將不同包的不同級別日志輸出到info1.txt中。

本文的代碼在這里(https://github.com/yqbjtu/springboot/tree/1.0/LogbackDemo)，歡迎加星，fork。
1， springboot配置日志logback日志的方式
官方文檔在https://docs.spring.io/spring-boot/docs/1.5.12.RELEASE/reference/html/boot-features-logging.html#boot-features-logging-format

我們一般只需要在application.properties中設置類似如下的配置即可。

logging.config=classpath:logback-spring2.xml

2，程序的基本結構
程序是標準的springboot程序，基于springboot 1.5.12， 使用swagger訪問rest。包含service包和controller包。

codeStructure.png

3，logback.xml配置
簡要介紹，logback配置文件中有3個appender， 分別為， a，控制臺（級別為debug）輸出到console中，b，F(xiàn)ILE(沒有定義級別)輸出到logs/info1.log中，自動歸檔每天的日志，修改為2018-11-10.txt這樣保存起來。只保留最近7天的日志。c，ERROR_FILE與FILE類似，只記錄error級別的日志。

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>

    <!-- 控制臺輸出 -->
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>DEBUG</level> <!-- 日志過濾級別 -->
        </filter>
        <encoder>
            <pattern>%date %-5level [${HOSTNAME} %thread] %caller{1}%msg%n</pattern><!-- 格式化輸出 -->
            <charset>utf8</charset> <!-- 輸出編碼 -->
        </encoder>
    </appender>

    <!-- 文件輸出 -->
    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>%date %-5level [${HOSTNAME} %thread] %caller{1}%msg%n</pattern><!-- 格式化輸出 -->
            <charset>utf8</charset> <!-- 輸出編碼 -->
        </encoder>
        <file>./logs/info1.log</file><!-- 文件存放路徑 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>/logs/info/%d{yyyy-MM-dd}.log</fileNamePattern><!-- 每天歸檔 -->
            <maxHistory>7</maxHistory><!-- 日志存放周期（天） -->
        </rollingPolicy>
    </appender>
    <!-- 錯誤日志文件輸出 -->
    <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level> <!-- 日志過濾級別 -->
        </filter>
        <encoder>
            <pattern>%date %-5level [${HOSTNAME} %thread] %caller{1}%msg%n</pattern><!-- 格式化輸出 -->
            <charset>utf8</charset> <!-- 輸出編碼 -->
        </encoder>
        <file>./logs/error1.log</file><!-- 文件存放路徑 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>/logs/error/%d{yyyy-MM-dd}.log</fileNamePattern><!-- 每天歸檔 -->
            <maxHistory>7</maxHistory><!-- 日志存放周期（天） -->
        </rollingPolicy>
    </appender>



    <!-- 基礎日志輸出級別 -->
    <root level="DEBUG">
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="ERROR_FILE"/>
    </root>


    <logger name="com.yq.controller" level="trace" additivity="false">
        <appender-ref ref="FILE" />
    </logger>

    <logger name="com.yq.service" level="info" additivity="false">
        <appender-ref ref="FILE" />
    </logger>

    <logger name="org.springframework.beans" level="debug" additivity="false">
        <appender-ref ref="FILE" />
    </logger>


</configuration>

xml文件解釋

com.yq.controller包trace級別及其以上的日志，com.yq.service包info級別及其以上的日志，org.springframework.beans包debug級別及其以上的日志會記錄在FILE中，也就是記錄到info1.txt中

啟動程序后訪問http://127.0.0.1:9090/swagger-ui.html#/user-controller/getUserUsingGET， 點擊getUser方法。
然后查看控制臺日志，程序所在目錄下的logs目錄中的info1.txt和error1.txt。

結果，按照如上配置，
info1.txt記錄了很多springboot的日志包括debug級別的日志，
com.yq.controller包下面的所有trace級別以上信息
com.yq.service包下面的所有info級別以上的信息
org.springframework.beans包下面的所有debug級別以上的信息
error1.txt只記錄com.yq.LogbackApplication的錯誤日志，沒有com.yq.controller和com.yq.controller的錯誤
console中controller包和servcie包都沒有記錄， 只有springboot的com.yq.LogbackApplication的日志

info1.txt內容為
Returning cached instance of singleton bean ‘mvcViewResolver’
2018-11-10 15:23:26,769 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean ‘defaultViewResolver’
2018-11-10 15:23:26,769 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean ‘viewResolver’
2018-11-10 15:23:26,769 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean ‘thymeleafViewResolver’
2018-11-10 15:23:26,770 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean ‘org.springframework.web.servlet.support.SessionFlashMapManager’
2018-11-10 15:23:26,776 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean ‘org.springframework.web.servlet.support.SessionFlashMapManager’
2018-11-10 15:23:26,807 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean ‘userController’
2018-11-10 15:23:26,829 ERROR [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.service.impl.UserServiceImpl.getById(UserServiceImpl.java:40)
error find user=2 by id=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018)
2018-11-10 15:23:26,830 WARN [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.service.impl.UserServiceImpl.getById(UserServiceImpl.java:41)
warn find user=2 by id=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018)
2018-11-10 15:23:26,830 INFO [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.service.impl.UserServiceImpl.getById(UserServiceImpl.java:42)
info find user=2 by id=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018)
2018-11-10 15:23:26,830 ERROR [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.controller.UserController.getUser(UserController.java:37)
error rest get user=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018) by id=2
2018-11-10 15:23:26,830 WARN [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.controller.UserController.getUser(UserController.java:38)
warn rest get user=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018) by id=2
2018-11-10 15:23:26,830 INFO [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.controller.UserController.getUser(UserController.java:39)
info rest get user=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018) by id=2
2018-11-10 15:23:26,830 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.controller.UserController.getUser(UserController.java:40)
debug rest get user=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018) by id=2
2018-11-10 15:23:26,830 TRACE [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at com.yq.controller.UserController.getUser(UserController.java:41)
trace rest get user=User(id=2, name=Tom2, mail=qq2@163.com, regDate=Sat Nov 10 15:23:18 CST 2018) by id=2

error1.txt內容為
2018-11-10 15:23:20,428 ERROR [DESKTOP-8S2E5H7 restartedMain] Caller+0 at com.yq.LogbackApplication.main(LogbackApplication.java:19)
error LogbackApplication Start done.

控制臺的內容為
Starting application com.yq.LogbackApplication with URLs [file:/D:/E/workspaceGitub/springboot/LogbackDemo/target/classes/]
2018-11-10 15:23:20,428 INFO [DESKTOP-8S2E5H7 restartedMain] Caller+0 at org.springframework.boot.StartupInfoLogger.logStarted(StartupInfoLogger.java:57)
Started LogbackApplication in 6.774 seconds (JVM running for 7.439)
2018-11-10 15:23:20,428 ERROR [DESKTOP-8S2E5H7 restartedMain] Caller+0 at com.yq.LogbackApplication.main(LogbackApplication.java:19)
error LogbackApplication Start done.
2018-11-10 15:23:20,428 WARN [DESKTOP-8S2E5H7 restartedMain] Caller+0 at com.yq.LogbackApplication.main(LogbackApplication.java:20)
warn LogbackApplication Start done.
2018-11-10 15:23:20,428 INFO [DESKTOP-8S2E5H7 restartedMain] Caller+0 at com.yq.LogbackApplication.main(LogbackApplication.java:21)
info LogbackApplication Start done.
2018-11-10 15:23:20,428 DEBUG [DESKTOP-8S2E5H7 restartedMain] Caller+0 at com.yq.LogbackApplication.main(LogbackApplication.java:22)
debug LogbackApplication Start done.
2018-11-10 15:23:26,749 DEBUG [DESKTOP-8S2E5H7 http-nio-9090-exec-1] Caller+0 at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:149)
Initializing servlet ‘dispatcherServlet’

作者：russle
來源：CSDN
原文：https://blog.csdn.net/russle/article/details/83932651
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