这个问题很简单，但我找不到资料。 (可能我对Java框架的知识严重缺乏)
如何使用application.properties设置日志级别? 日志文件的位置，等等?
当前回答
如果你想设置更多的细节，请添加一个日志配置文件名“logback.xml”或“logback-spring.xml”。
在你的应用中。属性文件，输入如下:
logging.config: classpath:logback-spring.xml
在loback-spring.xml中，像这样输入:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<appender name="ROOT_APPENDER" 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>
<file>sys.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_DIR}/${SYSTEM_NAME}/system.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>500MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-20(%d{yyy-MM-dd HH:mm:ss.SSS} [%X{requestId}]) %-5level - %logger{80} - %msg%n
</pattern>
</encoder>
</appender>
<appender name="BUSINESS_APPENDER" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>TRACE</level>
<onMatch>ACCEPT</onMatch>
<onMismatch>DENY</onMismatch>
</filter>
<file>business.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_DIR}/${SYSTEM_NAME}/business.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>500MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-20(%d{yyy-MM-dd HH:mm:ss.SSS} [%X{requestId}]) %-5level - %logger{80} - %msg%n
</pattern>
</encoder>
</appender>
<logger name="{project-package-name}" level="TRACE">
<appender-ref ref="BUSINESS_APPENDER" />
</logger>
<root level="INFO">
<appender-ref ref="ROOT_APPENDER" />
</root>
</configuration>
其他回答
假设应用程序的包名为com.company.myproject。然后，您可以在应用程序中为项目中的类设置日志级别，如下所示。属性文件
loging.level.com.company.myproject = DEBUG
loging.level.org.springframework.web = DEBUG和loging.level.org.hibernate = DEBUG将仅为Spring框架web和Hibernate的类设置日志级别。
用于设置日志文件位置使用
伐木。文件= /home/ubuntu/myproject
如果你想设置更多的细节，请添加一个日志配置文件名“logback.xml”或“logback-spring.xml”。
在你的应用中。属性文件，输入如下:
logging.config: classpath:logback-spring.xml
在loback-spring.xml中，像这样输入:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<appender name="ROOT_APPENDER" 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>
<file>sys.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_DIR}/${SYSTEM_NAME}/system.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>500MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-20(%d{yyy-MM-dd HH:mm:ss.SSS} [%X{requestId}]) %-5level - %logger{80} - %msg%n
</pattern>
</encoder>
</appender>
<appender name="BUSINESS_APPENDER" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>TRACE</level>
<onMatch>ACCEPT</onMatch>
<onMismatch>DENY</onMismatch>
</filter>
<file>business.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${LOG_DIR}/${SYSTEM_NAME}/business.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>500MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-20(%d{yyy-MM-dd HH:mm:ss.SSS} [%X{requestId}]) %-5level - %logger{80} - %msg%n
</pattern>
</encoder>
</appender>
<logger name="{project-package-name}" level="TRACE">
<appender-ref ref="BUSINESS_APPENDER" />
</logger>
<root level="INFO">
<appender-ref ref="ROOT_APPENDER" />
</root>
</configuration>
设置根日志级别的正确方法是使用logging.level.root属性。参见文档，自最初提出这个问题以来，文档已经更新。
例子:
logging.level.root=WARN
记录:官方文档，如Spring Boot v1.2.0。RELEASE和Spring v4.1.3 RELEASE:
If the only change you need to make to logging is to set the levels of various loggers then you can do that in application.properties using the "logging.level" prefix, e.g. logging.level.org.springframework.web: DEBUG logging.level.org.hibernate: ERROR You can also set the location of a file to log to (in addition to the console) using "logging.file". To configure the more fine-grained settings of a logging system you need to use the native configuration format supported by the LoggingSystem in question. By default Spring Boot picks up the native configuration from its default location for the system (e.g. classpath:logback.xml for Logback), but you can set the location of the config file using the "logging.config" property.
如果您想使用不同的日志框架(例如log4j)，我发现最简单的方法是禁用spring引导自己的日志记录并实现自己的日志记录。这样我就可以在一个文件log4j.xml(在我的例子中)中配置每个日志级别。
要实现这一点，你只需要将这些行添加到你的pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j</artifactId>
</dependency>
您可能已经有了第一个依赖项，只需要另外两个依赖项。请注意，这个例子只包含log4j。 以上就是全部内容，现在您就可以在log4j配置文件中为引导配置日志了!
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