Question

我有一个Spring Boot应用程序，它按照https://www.baeldung.com/spring-boot-logging的教程尝试使用slf4j，但是日志仅在控制台端打印。在给定目录/var/logs中没有创建日志文件。

log4j2-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout
                    pattern="%style{%d{ISO8601}}{black} %highlight{%-5level }[%style{%t}{bright,blue}] %style{%C{1.}}{bright,yellow}: %msg%n%throwable" />
        </Console>

        <RollingFile name="RollingFile"
                     fileName="/var/logs/spring-boot-logger-log4j2.log"
                     filePattern="/var/logs/$${date:yyyy-MM}/spring-boot-logger-log4j2-%d{-dd-MMMM-yyyy}-%i.log.gz">
            <PatternLayout>
                <pattern>%d %p %C{1.} [%t] %m%n</pattern>
            </PatternLayout>
            <Policies>
                <!-- rollover on startup, daily and when the file reaches
                    10 MegaBytes -->
                <OnStartupTriggeringPolicy />
                <SizeBasedTriggeringPolicy
                        size="10 MB" />
                <TimeBasedTriggeringPolicy />
            </Policies>
        </RollingFile>
    </Appenders>

    <Loggers>
        <!-- LOG everything at INFO level -->
        <Root level="info">
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </Root>

        <Logger name="com.buraktas">
            <AppenderRef ref="LogFile"/>
            <AppenderRef ref="Console"/>
        </Logger>
    </Loggers>

</Configuration>

Maven依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.1.0.RELEASE</version>
    <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-log4j2</artifactId>
</dependency>

Answer 1

您可以在application.properties文件中定义日志路径，例如，检查以下链接：

logging.level.com.example.springscheduler = debug
logging.level.org.springframework.web = WARN
logging.file.name =log/loggingdemocontroller.log

https://springbootmvc.blogspot.com/2020/06/spring-boot-logging-using-orgslf4jlogger.html

Answer 2

我发现了我有spring-boot-starter和spring-boot-starter-web依赖性的问题。我仅从其中之一排除了spring-boot-starter-logging依赖性，这迫使spring使用logback logger。而且由于logback logger不会选择log4j2.xml进行配置，因此不会创建任何文件。所以pom.xml文件就是这样；

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
    <version>2.1.0.RELEASE</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.1.0.RELEASE</version>
    <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-log4j2</artifactId>
</dependency>

我还需要从spring-boot-starter-logging依赖项中排除spring-boot-starter。好吧，毕竟我有了spring-boot-starter-web，所以我只是删除了spring-boot-starter不需要的软件包。

使用slf4j的Spring Boot没有创建日志文件

2 个答案: