spring-boot 默认日志位置

问题描述

在 spring-boot 应用程序中，我可以指定一个自定义日志文件

In a spring-boot application I can specify a custom log file with

java -jar spring-boot-app.jar --logging.file=/home/ubuntu/spring-boot-app.log

但是如果我不指定一个，它会去哪里?

But if I don't specify one, where does it go?

我在以下任何文件夹中都找不到它:

I couldn't find it in any of the following folders:

/tmp/
/var/log/
~/

我没有spring-boot-starter-logging 或任何其他日志依赖项.

I do not have spring-boot-starter-logging or any additional logging dependencies.

我希望有类似于 catalina.out 的东西，因为默认配置运行嵌入式 Tomcat:

I was hoping to have something similar to catalina.out since the default configuration runs an embedded Tomcat:

INFO 10374 --- [main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8100 (http)

推荐答案

Spring Boot 使用 Commons Logging 进行所有内部日志记录，但保持底层日志实现开放.

Spring Boot uses Commons Logging for all internal logging, but leaves the underlying log implementation open.

为 Java Util Logging、Log4J、Log4J2 和 Logback 提供了默认配置.在每种情况下，记录器都预配置为使用控制台输出，还提供可选的文件输出.

Default configurations are provided for Java Util Logging, Log4J, Log4J2 and Logback. In each case loggers are pre-configured to use console output with optional file output also available.

来自 Spring Boot 日志记录文档.

默认日志配置将在写入消息时将消息回显到控制台.因此，除非您按照描述明确指定文件，否则它会一直保留在控制台中.

The default log configuration will echo messages to the console as they are written.So until you explicitly specify a file as you described, it stays in the Console.

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