对于一个非常基本的spring-boot应用程序，我尝试使用log4j 2 yaml配置登录到一个日志文件。但是没有创建日志文件。我试着四处看看，但是似乎没有一个解决方案起作用。

pom档案具有下列相依性：

<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>

完成日志记录的代码（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“resources”目录中

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

我看到控制台中正在打印内容：

.   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.2)

17:25:49.535 [http-nio-8080-exec-2] ERROR com.example.demo.controller.DemoController - ERROR!!!