java - Spring Boot 不搜索 log4j2 配置文件

Question

我正在尝试将 Apache Log4j 2.12.1 与 Spring Boot 2.2.1 一起使用，但是当我运行时，它没有给出任何关于缺少 log4j 2 配置文件的警告。下面是日志记录的代码(简单的一次类来测试它是否有效或注意):

package com.example.Log4jdemoSpringboot;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Log4jDemoSpringBootApplication {

    static Logger logger = LogManager.getLogger(Log4jDemoSpringBootApplication.class);
    public static void main(String[] args) {
        SpringApplication.run(Log4jDemoSpringBootApplication.class, args);
        logger.info("info");
        logger.warn("warn");
        logger.error("error");
        logger.debug("debug");
        logger.fatal("fatal");
    }

}

下面是输出:

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.1.RELEASE)

2019-11-18 12:19:20.844  INFO 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : Starting Log4jDemoSpringBootApplication on Gurpreet-PC with PID 13136 (C:\Development\eclipse-workspace\Log4j-demo-Spring-boot\target\classes started by Gurpreet in C:\Development\eclipse-workspace\Log4j-demo-Spring-boot)
2019-11-18 12:19:20.872  INFO 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : No active profile set, falling back to default profiles: default
2019-11-18 12:19:26.946  INFO 13136 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-11-18 12:19:27.009  INFO 13136 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-11-18 12:19:27.011  INFO 13136 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.27]
2019-11-18 12:19:27.442  INFO 13136 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-11-18 12:19:27.444  INFO 13136 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 6320 ms
2019-11-18 12:19:28.213  INFO 13136 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-11-18 12:19:28.925  INFO 13136 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-11-18 12:19:28.937  INFO 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : Started Log4jDemoSpringBootApplication in 10.398 seconds (JVM running for 13.269)
2019-11-18 12:19:28.945  INFO 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : info
2019-11-18 12:19:28.949  WARN 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : warn
2019-11-18 12:19:28.952 ERROR 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : error
2019-11-18 12:19:28.953 ERROR 13136 --- [           main] c.e.L.Log4jDemoSpringBootApplication     : fatal

但是，如果我对简单的 java 项目使用相同的配置，它就可以工作。

Answer 1

我遇到了问题，spring boot 没有搜索配置 xml 文件。我将这一行添加到 application.properties(log4j2.xml 在 src/main/resources 中)

logging.config=classpath:log4j2.xml