Log4j2 未读取配置文件

问题描述 投票：0回答：1

请友善，我是日志记录的新手，即使在尝试了很多事情并完全按照文档进行操作之后，我还是遇到了 log4j2 的一些问题。

我花了整个上午的时间试图弄清楚如何让 log4j2 打印简单的调试消息。我查阅了所有资源、相关文档以及 StackOverflow 上的答案。

无论我做什么，log4j2 似乎总是使用默认配置。我尝试从命令行设置配置文件位置，但仍然没有成功。

我的类路径中还有其他使用日志记录的依赖项，例如 Playwright。我不确定这是否会影响我的问题。

运行 

mvn clean test -Dlog4j.debug
会产生以下消息。经过一段时间的搜索后，我不确定这到底意味着什么，或者是否相关：

WARN StatusLogger Multiple logging implementations found:
Factory: org.apache.logging.log4j.core.impl.Log4jContextFactory, Weighting: 10
Factory: org.apache.logging.slf4j.SLF4JLoggerContextFactory, Weighting: 15
Using factory: org.apache.logging.slf4j.SLF4JLoggerContextFactory

Java：

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

class ExampleClass {
    static Logger logger = LogManager.getLogger();

    void main() {
        logger.debug("Hello world")
    }
}

src/main/resources/log4j2.xml：

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="trace">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="all">
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

pom.xml：

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.toughdata.autogrowth</groupId>
  <artifactId>autogrowth</artifactId>
  <version>1.0-SNAPSHOT</version>

  <name>autogrowth</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!--maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target-->
    <maven.compiler.release>17</maven.compiler.release>
  </properties>

  <repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
  </repositories>

  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>

        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-assembly-plugin</artifactId>
          <configuration>
            <archive>
              <manifest>
                <mainClass>com.toughdata.autogrowth.CLI</mainClass>
              </manifest>
            </archive>
            <descriptorRefs>
              <descriptorRef>jar-with-dependencies</descriptorRef>
            </descriptorRefs>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
          <configuration>
              <archive>
                  <manifest>
                      <addClasspath>true</addClasspath>
                      <classpathPrefix>lib/</classpathPrefix>
                      <mainClass>com.toughdata.autogrowth.CLI</mainClass>
                  </manifest>
              </archive>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>3.1.0</version>
            <executions>
              <execution>
                <goals>
                  <goal>java</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
      </plugins>
    </pluginManagement>

      <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>3.2.0</version>
            <configuration>    
                <mainClass>com.toughdata.autogrowth.server.Server</mainClass>
            </configuration>
        </plugin>
          <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-compiler-plugin</artifactId>
              <configuration>
                  <source>9</source>
                  <target>9</target>
              </configuration>
          </plugin>
          <plugin>
        <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.6.1</version>
          </plugin>
      </plugins>
    
      <resources>
          <resource>
              <directory>src/main/resources</directory>
          </resource>
      </resources>

  </build>

  <dependencies>
    <!-- Argparse -->
    <dependency>
      <groupId>net.sourceforge.argparse4j</groupId>
      <artifactId>argparse4j</artifactId>
      <version>0.9.0</version>
    </dependency>

    <!-- Playwright -->
    <dependency>
      <groupId>com.microsoft.playwright</groupId>
      <artifactId>playwright</artifactId>
      <version>1.39.0</version>
    </dependency>

    <!-- Junit -->
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <version>5.10.0</version>
        <scope>test</scope>
    </dependency>

    <!-- Postgres -->
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>42.7.1</version>
    </dependency>

    <!-- Spring data JPA -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>3.2.0</version>
    </dependency>

    <!-- Spring boot web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>3.2.0</version>
    </dependency>

    <!-- Spring boot test -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <version>3.2.0</version>
        <scope>test</scope>
    </dependency>


    <!-- JavaMail -->
    <dependency>
        <groupId>com.sun.mail</groupId>
        <artifactId>javax.mail</artifactId>
        <version>1.6.2</version>
    </dependency>

    <!-- JSON -->
    <dependency>
        <groupId>org.json</groupId>
        <artifactId>json</artifactId>
        <version>20230618</version>
    </dependency>

    <!-- Log4j -->
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.17.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.17.1</version>
    </dependency>
  </dependencies>

</project>
java debugging logging log4j log4j2
1个回答
0
投票

有几个问题

  • 首先为什么你使用 spring-boot 而不继承父项目？
  • 第二，Spring Boot 默认使用 logback，要正确使用 log4j 你必须排除 logback ！还有其他多余的东西。尝试按照 spring-boot 文档简化您的项目！
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