Spring伐木

Question

我有一个spring boot应用程序，在它启动后，我们通常会看到控制台的以下输出

 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.4.0)
1283 [main] INFO org.springframework.boot.web.embedded.tomcat.TomcatWebServer - Tomcat started on port(s): 8080 (http) with context path 

等...

我需要得到这个日志输出：

1283 [main] INFO org.springframework.boot.web.embedded.tomcat.TomcatWebServer - Tomcat started on port(s): 8080 (http) with context path 

并使用slf4j将其放入文件中

我有一份申请。设置为slf4j的属性

logging.level.root=INFO
logging.level.org.spring.upskill = INFO
logging.level.org.springframework.web = INFO
logging.file.name = app.log

但我没有得到文件的完整输出。只有对我的GetMappings的响应

例如

[2020-12-10 14:31:53.381] - 19960 INFO [main] --- org.apache.catalina.core.StandardService: Starting service [Tomcat]
[2020-12-10 14:31:53.385] - 19960 INFO [main] --- org.apache.catalina.core.StandardEngine: Starting Servlet engine: [Apache Tomcat/9.0.39]
[2020-12-10 14:31:53.432] - 19960 INFO [main] --- org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/]: Initializing Spring embedded WebApplicationContext

我该怎么做？

非常感谢。

Answer 1

我想你可以用appender。滚动的。政策。创业。在属性中键入=OnStartupTriggeringPolicy或更新log4j2。xml，包括下面的内部附加程序--

    <Policies>
        <!-- Starts a new log on tomcat start -->
        <OnStartupTriggeringPolicy />
        <!-- Starts a new file when size reaches threshold -->
        <SizeBasedTriggeringPolicy size="100 MB" />
        <!-- causes a rollover once the date/time pattern no longer applies to 
            the active file
        <TimeBasedTriggeringPolicy /> -->
    </Policies>