只需在src/main/resources中添加一个名为logback.xml的文件，其内容如下所示(逐字复制，但Spring Boot来源的控制台部分除外):

Just add a file called logback.xml in src/main/resources with content like (copied verbatim except for console part from Spring Boot's source):

<?xml version="1.0" encoding="UTF-8"?>
<configuration>


    <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>
    <property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${PID:- } [%t] --- %-40.40logger{39} : %m%n%wex"/>

    <appender name="FILE"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>${FILE_LOG_PATTERN}</pattern>
        </encoder>
        <file>${LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
            <fileNamePattern>${LOG_FILE}.%i</fileNamePattern>
        </rollingPolicy>
        <triggeringPolicy
                class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <root level="INFO">
        <appender-ref ref="FILE" />
    </root>

</configuration>

请注意

<property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>

为了支持从Spring Boot的logging.file和logging.path设置日志文件，需要

.

is needed in order to support setting the log file from Spring Boot's logging.file and logging.path.

如果您要做的只是设置一些标准日志文件，则可以在上面的属性中设置其路径.

If all you want to do is set some standard log file, you could set place it's path in property above.

更新(2015年2月4日)

在较新版本的Spring Boot中，您可以轻松地从Spring Boot中包含base.xml并创建以下logback.xml.

In newer versions of Spring Boot you can easily just include the base.xml from Spring Boot and create the following logback.xml.

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

    <root level="INFO">
        <appender-ref ref="FILE" />
    </root>
</configuration>

更新(15-09-2017)

为了在Spring Boot 1.5.x和2.0.0.M4上运行，我添加了一个名为logback-spring.xml的文件并将其添加到resources目录中. 该文件可能看起来像这样

In order to get this working on Spring Boot 1.5.x and 2.0.0.M4 I added a file called logback-spring.xml and added it in the resources directory. The file could look like this

<?xml version="1.0" encoding="UTF-8"?>
<configuration>


    <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>
    <property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${PID:- } [%t] --- %-40.40logger{39} : %m%n"/>

    <appender name="FILE"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>${FILE_LOG_PATTERN}</pattern>
        </encoder>
        <file>${LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
            <fileNamePattern>${LOG_FILE}.%i</fileNamePattern>
        </rollingPolicy>
        <triggeringPolicy
                class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <root level="INFO">
        <appender-ref ref="FILE" />
    </root>

</configuration>