logback.xml的加載順序早于springboot的application.yml (或application.properties) 配置文件當(dāng)然讀不到application.yml（或application.properties）文件中的值了。

?

需要通過springProperty標(biāo)簽來引用：<springProperty scope="context" name="log.path" source="path.log"/>這里的name和上面property標(biāo)簽。

?

如下：

其中application.properties：

springBoot.log=D:/logs

logback-spring.xml

<?xml version="1.0" encoding="UTF-8" ?> <configuration><springProperty scope="context" name="LOG_HOME" source="springBoot.log" /><!--輸出日志格式--><appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender"><layout class="ch.qos.logback.classic.PatternLayout"><pattern>%d - %msg%n</pattern></layout></appender><!--只保存info日志--><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><!--滾動(dòng)輸出策略--><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><!--路徑--> <!-- <fileNamePattern>D:/logs/info/info.%d.log</fileNamePattern>--><fileNamePattern>${LOG_HOME}/info/info.%d.log</fileNamePattern></rollingPolicy></appender><!--只保存warn日志--><appender name="fileWarnLog" class="ch.qos.logback.core.rolling.RollingFileAppender"><filter class="ch.qos.logback.classic.filter.LevelFilter"><level>WARN</level><onMatch>ACCEPT</onMatch><onMismatch>DENY</onMismatch></filter><encoder><pattern>%d - %msg%n</pattern></encoder><!--滾動(dòng)輸出策略--><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><!--路徑--> <!-- <fileNamePattern>D:/logs/warn/warn.%d.log</fileNamePattern>--><fileNamePattern>${LOG_HOME}/warn/warn.%d.log</fileNamePattern></rollingPolicy></appender><!--只保存error日志--><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><!--滾動(dòng)輸出策略--><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><!--路徑--> <!-- <fileNamePattern>D:/logs/error/error.%d.log</fileNamePattern>--><fileNamePattern>${LOG_HOME}/error/error.%d.log</fileNamePattern></rollingPolicy></appender><root level="info"><appender-ref ref="consoleLog"/><appender-ref ref="fileInfoLog"/><appender-ref ref="fileWarnLog"/><appender-ref ref="fileErrorLog"/></root></configuration>

?

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