26.4 Log Levels

所有Spring Boot支持的日志系统都可以在Spring Environment中设置级别(application.properties里也一样),设置格式为logging.level.*=LEVEL,其中LEVELTRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF之一: 以下是application.properties示例:

logging.level.root=WARN
logging.level.org.springframework.web=DEBUG
logging.level.org.hibernate=ERROR

默认情况,Spring Boot会重新映射ThymeleafINFO信息到DEBUG级别,这能减少标准日志输出的噪声。查看[LevelRemappingAppender](https://github.com/spring-projects/spring-boot/tree/v1.4.1.RELEASE/spring-boot/src/main/java/org/springframework/boot/logging/logback/LevelRemappingAppender.java)可以按自己的配置设置映射。

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