Log4j2日志记录配置未创建日志文件

Question

对于一个非常基本的spring启动应用程序，我正在尝试使用log4j2yaml配置登录到一个日志文件中。但是没有创建日志文件。我试着四处看看，但似乎没有一个解决方案奏效。

pom文件具有以下依赖项：

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
</dependency>
</dependencies>

进行日志记录的代码(也是应用程序中唯一的代码(：

import com.example.demo.model.DemoData;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@Log4j2
@RestController
public class DemoController {
@Value("${messageFromProperties}")
private String messageFromProperties;
@Value("${messageFromYaml}")
private String messageFromYaml;
@GetMapping("/demo")
public ResponseEntity<DemoData> getDemoMessage(){
DemoData demoData = new DemoData(messageFromProperties, messageFromYaml);
log.error("ERROR!!!");
log.debug("DEBUG!!!");
log.info("INFO!!!");
return ResponseEntity.ok().body(demoData);
}
}

属性文件：

messageFromProperties: Message from properties
messageFromYaml: Message from YAML!!!
logging:
config: classpath:log4j2.yml

log4j2.yml文件内容。文件存在于"；资源"；目录

Configuration:
status: debug
appenders:
RollingFile:
- name: LogToRollingFile
fileName: "logs/demo.log"
filePattern: "logs/$${date:yyyy-MM}/demo-%d{MM-dd-yyyy}-%i.log.gz"
PatternLayout:
pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
Policies:
SizeBasedTriggeringPolicy:
size: 10MB
DefaultRollOverStrategy:
max: 10
Loggers:
logger:
- name: com.example
level: debug
AppenderRef:
- ref: LogToRollingFile
Root:
level: debug
AppenderRef:
- ref: LogToRollingFile

我看到控制台中打印的内容：

.   ____          _            __ _ _
/\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
\/  ___)| |_)| | | | | || (_| |  ) ) ) )
'  |____| .__|_| |_|_| |___, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot ::                (v2.7.2)
17:25:49.535 [http-nio-8080-exec-2] ERROR com.example.demo.controller.DemoController - ERROR!!!

Answer 1

如果您可以将记录器配置放在一个单独的XML文件中，那么您可以尝试以下操作：

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="debug_logs" value="logs/debug_logs"/>
<appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level --- [%12.12thread] %-50logger{36} : %msg%n</Pattern>
</layout>
</appender>
<appender name="RollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${debug_logs}/debug.log</file>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level --- [%12.12thread] %-50logger{36} : %msg%n</Pattern>
</encoder>

<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${debug_logs}/debug.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy
class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<!--Max Size of each file to start Archive -->
<maxFileSize>10MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>

<!-- Days till log history to keep -->
<maxHistory>30</maxHistory>
<totalSizeCap>150MB</totalSizeCap>
</rollingPolicy>

</appender>


<!-- LOG everything at INFO level -->
<root level="INFO">
<appender-ref ref="RollingFile"/>
<appender-ref ref="Console"/>
</root>
</configuration>

一旦将此配置(logback.xml(与applciation.properties放在同一目录中，就可以使用类顶部的@Slf4j注释(由Lombok提供(，并使用日志对象记录任何您想要的内容。

如果一切正常，您应该能够在/logs/debug_logs/debug.log的文件夹(与项目位于同一目录(中查看日志。