我在尝试将spring4j2与spring boot一起使用时遇到此错误。
ERROR StatusLogger Log4j2 could not find a logging implementation.
Please add log4j-core to the classpath. Using SimpleLogger to log to the console...
我已遵循本指南：http://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html#howto-configure-log4j-for-logging - 并且还添加了https://logging.apache.org/log4j/2.x/maven-artifacts.html
中的两个log4j2依赖项我的依赖：树看起来像这样：
[INFO] --- maven-dependency-plugin:2.10:tree (default-cli) @ musikkjulekalender ---
[INFO] no.saiboten:musikkjulekalender:war:1.0-SNAPSHOT
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.4.0.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.3.1:compile
[INFO] | +- org.springframework:spring-web:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-jetty:jar:1.4.0.RELEASE:compile
[INFO] | +- org.eclipse.jetty:jetty-servlets:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-continuation:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-http:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-io:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-webapp:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-xml:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-servlet:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-security:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty.websocket:websocket-server:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty.websocket:websocket-common:jar:9.3.11.v20160721:compile
[INFO] | | | \- org.eclipse.jetty.websocket:websocket-api:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty.websocket:websocket-client:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty.websocket:websocket-servlet:jar:9.3.11.v20160721:compile
[INFO] | \- org.eclipse.jetty.websocket:javax-websocket-server-impl:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-annotations:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-plus:jar:9.3.11.v20160721:compile
[INFO] | | +- javax.annotation:javax.annotation-api:jar:1.2:compile
[INFO] | | +- org.ow2.asm:asm:jar:5.0.1:compile
[INFO] | | \- org.ow2.asm:asm-commons:jar:5.0.1:compile
[INFO] | | \- org.ow2.asm:asm-tree:jar:5.0.1:compile
[INFO] | +- org.eclipse.jetty.websocket:javax-websocket-client-impl:jar:9.3.11.v20160721:compile
[INFO] | \- javax.websocket:javax.websocket-api:jar:1.0:compile
[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-aop:jar:1.4.0.RELEASE:compile
[INFO] | | \- org.aspectj:aspectjweaver:jar:1.8.9:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-jdbc:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.apache.tomcat:tomcat-jdbc:jar:8.5.4:compile
[INFO] | | | \- org.apache.tomcat:tomcat-juli:jar:8.5.4:compile
[INFO] | | \- org.springframework:spring-jdbc:jar:4.3.2.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-core:jar:5.0.9.Final:compile
[INFO] | | +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] | | +- org.javassist:javassist:jar:3.20.0-GA:compile
[INFO] | | +- antlr:antlr:jar:2.7.7:compile
[INFO] | | +- org.jboss:jandex:jar:2.0.0.Final:compile
[INFO] | | +- dom4j:dom4j:jar:1.6.1:compile
[INFO] | | | \- xml-apis:xml-apis:jar:1.4.01:compile
[INFO] | | \- org.hibernate.common:hibernate-commons-annotations:jar:5.0.1.Final:compile
[INFO] | +- org.hibernate:hibernate-entitymanager:jar:5.0.9.Final:compile
[INFO] | +- javax.transaction:javax.transaction-api:jar:1.2:compile
[INFO] | \- org.springframework:spring-aspects:jar:4.3.2.RELEASE:compile
[INFO] +- com.h2database:h2:jar:1.4.192:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test-autoconfigure:jar:1.4.0.RELEASE:test
[INFO] | +- com.jayway.jsonpath:json-path:jar:2.2.0:test
[INFO] | | \- net.minidev:json-smart:jar:2.2.1:test
[INFO] | | \- net.minidev:accessors-smart:jar:1.1:test
[INFO] | +- org.assertj:assertj-core:jar:2.5.0:test
[INFO] | +- org.mockito:mockito-core:jar:1.10.19:test
[INFO] | | \- org.objenesis:objenesis:jar:2.1:test
[INFO] | +- org.hamcrest:hamcrest-core:jar:1.3:compile
[INFO] | +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] | +- org.skyscreamer:jsonassert:jar:1.3.0:test
[INFO] | | \- org.json:json:jar:20140107:test
[INFO] | +- org.springframework:spring-core:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-test:jar:4.3.2.RELEASE:test
[INFO] +- org.springframework.boot:spring-boot-starter:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.0.RELEASE:compile
[INFO] | \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] +- org.springframework.boot:spring-boot-starter-log4j2:jar:1.4.0.RELEASE:compile
[INFO] | +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.6.2:compile
[INFO] | +- org.slf4j:jcl-over-slf4j:jar:1.7.21:compile
[INFO] | \- org.slf4j:jul-to-slf4j:jar:1.7.21:compile
[INFO] +- org.apache.logging.log4j:log4j-api:jar:2.6.2:compile
[INFO] +- org.apache.logging.log4j:log4j-core:jar:2.6.2:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.3.2:compile
[INFO] +- org.mongodb:mongo-java-driver:jar:2.12.4:compile
[INFO] +- org.springframework.data:spring-data-mongodb:jar:1.9.2.RELEASE:compile
[INFO] | +- org.springframework:spring-tx:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-beans:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-expression:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework.data:spring-data-commons:jar:1.12.2.RELEASE:compile
[INFO] | \- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] +- com.google.api-client:google-api-client:jar:1.18.0-rc:compile
[INFO] +- com.google.http-client:google-http-client-jackson2:jar:1.18.0-rc:compile
[INFO] | \- com.google.http-client:google-http-client:jar:1.18.0-rc:compile
[INFO] +- com.google.oauth-client:google-oauth-client:jar:1.18.0-rc:compile
[INFO] | \- com.google.code.findbugs:jsr305:jar:1.3.9:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.2:compile
[INFO] | \- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.1:compile
[INFO] +- com.google.apis:google-api-services-oauth2:jar:v2-rev81-1.19.0:compile
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.8.2:compile
[INFO] +- org.mongodb.morphia:morphia:jar:0.107:compile
[INFO] +- org.springframework.security:spring-security-web:jar:4.1.1.RELEASE:compile
[INFO] | +- aopalliance:aopalliance:jar:1.0:compile
[INFO] | \- org.springframework.security:spring-security-core:jar:4.1.1.RELEASE:compile
[INFO] +- org.springframework.security:spring-security-config:jar:4.1.1.RELEASE:compile
[INFO] | \- org.springframework:spring-aop:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.social:spring-social-config:jar:1.1.4.RELEASE:compile
[INFO] | \- org.springframework.social:spring-social-web:jar:1.1.4.RELEASE:compile
[INFO] | \- javax.inject:javax.inject:jar:1:compile
[INFO] +- org.springframework.social:spring-social-core:jar:1.1.4.RELEASE:compile
[INFO] +- org.springframework.social:spring-social-facebook:jar:2.0.3.RELEASE:compile
[INFO] +- org.apache.httpcomponents:httpclient:jar:4.3.6:compile
[INFO] | +- org.apache.httpcomponents:httpcore:jar:4.4.5:compile
[INFO] | \- commons-codec:commons-codec:jar:1.10:compile
[INFO] +- org.mockito:mockito-all:jar:1.10.8:compile
[INFO] +- junit:junit:jar:4.11:compile
[INFO] +- org.eclipse.jetty:apache-jsp:jar:9.3.11.v20160721:provided
[INFO] | +- org.eclipse.jetty:jetty-util:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-server:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty.toolchain:jetty-schemas:jar:3.1:provided
[INFO] | +- javax.servlet:javax.servlet-api:jar:3.1.0:compile
[INFO] | +- org.mortbay.jasper:apache-jsp:jar:8.0.33:provided
[INFO] | | \- org.mortbay.jasper:apache-el:jar:8.0.33:provided
[INFO] | \- org.eclipse.jdt.core.compiler:ecj:jar:4.4.2:provided
[INFO] +- javax.servlet:jstl:jar:1.2:compile
[INFO] +- org.springframework.data:spring-data-jpa:jar:1.10.2.RELEASE:compile
[INFO] | +- org.springframework:spring-orm:jar:4.3.2.RELEASE:compile
[INFO] | \- org.aspectj:aspectjrt:jar:1.8.9:compile
[INFO] +- postgresql:postgresql:jar:9.1-901-1.jdbc4:compile
[INFO] \- joda-time:joda-time:jar:2.9.4:compile
我已使用默认配置将标准log4j2.xml文件添加到src / main / resources / config：
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Logger name="org.apache.log4j.xml" level="info"/>
<Root level="debug">
<AppenderRef ref="STDOUT"/>
</Root>
</Loggers>
</Configuration>
任何猜测？我试过从Spring Tool Suite和maven spring-boot插件中运行。
按照流行的要求，这是完整的pom.xml：
<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/maven-v4_0_0.xsd">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.RELEASE</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>no.saiboten</groupId>
<artifactId>musikkjulekalender</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>Musikkjulekalender</name>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</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>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>2.12.4</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-jackson2</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-oauth2</artifactId>
<version>v2-rev81-1.19.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.mongodb.morphia</groupId>
<artifactId>morphia</artifactId>
<version>0.107</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-facebook</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.6</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.10.8</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>apache-jsp</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901-1.jdbc4</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.4</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<useSystemClassLoader>false</useSystemClassLoader>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</repository>
<repository>
<id>org.jboss.repository.releases</id>
<name>JBoss Maven Release Repository</name>
<url>https://repository.jboss.org/nexus/content/repositories/releases</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
答案 0 :(得分：5)
我查了LogManager.class的源代码，发现原因是 log4j-provider.properties 中找不到 LoggerContextFactory ，这应该是可以在 log4j-core.jar / META-INF 中找到 因此，请检查 log4j-core.jar / META-INF / log4j-provider.properties 文件，或者删除本地存储库中的 log4j-core.jar 。 / p>
答案 1 :(得分：3)
当log4j-api模块无法找到或加载其接口的实现时，会生成该错误消息。通常这意味着类路径中缺少log4j-core模块，但查看依赖图表似乎并非如此。
对log4j-slf4j-impl和log4j-jul模块有一些传递依赖，但我认为这不会导致错误消息。
进一步调查的一种方法是尝试使用此系统属性集再次启动应用程序：-Dorg.apache.logging.log4j.simplelog.StatusLogger.level=TRACE。这将打印log4j内部调试日志记录到控制台。
（加载配置文件后，可以通过在log4j2.xml配置文件的开头设置<Configuration status="trace">来控制StatusLogger输出级别。但是，配置文件由log4j-core模块加载，并且我们还没有......）
答案 2 :(得分：0)
看起来你的依赖是正确的。这是使用log4j2作为日志框架的工作spring-boot应用程序的pom：
<!-- Spring logging -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</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>
将log4j2.xml放入 resource 文件夹，以便从eclipse运行;如果您更喜欢使用不同的目录 - resource / conf - 使用JVM参数提供log4j2配置的路径，如下所示：
-Dlog4j.configurationFile =” CONF / log4j2.xml”
不要放弃并从logback切换回log4j2 ......
答案 3 :(得分：0)
可能有多种原因，但常见的原因是您可能使用了错误的JAR（已损坏）。 从存储库中删除JAR，然后尝试再次下载。它将解决问题。
就我而言，我已从Maven存储库中删除了org文件夹 {home} .m2 \ repository \ org。
我在这里发表了类似的问题。 Spring boot: ERROR StatusLogger Log4j2 could not find a logging implementation