SLF4J记录器绑定不工作

我试图让我的SLF4J记录器，但得到如下控制台消息：SLF4J记录器绑定不工作

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". 
SLF4J: Defaulting to no-operation (NOP) logger implementation 
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

即使在我加入了这两个依赖于我的pom.xml，但仍然有相同的消息：

<dependency> 
    <groupId>org.slf4j</groupId> 
    <artifactId>slf4j-api</artifactId> 
    <version>1.7.5</version> 
</dependency> 
<dependency> 
    <groupId>org.slf4j</groupId> 
    <artifactId>slf4j-simple</artifactId> 
    <version>1.7.5</version> 
</dependency>

我测试了我的记录是这样

import org.slf4j.Logger; 
import org.slf4j.LoggerFactory; 
... 
//Logger 
private static final Logger logger = LoggerFactory.getLogger(Hello.class); 
... 
logger.info("Test - - - Log message...");

我是新来春/ Maven和思想这将是很容易解决，但没有成功......

编辑：这里是我的Maven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"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>com.myfakecompany.project</groupId> 
    <artifactId>SpringApp</artifactId> 
    <packaging>war</packaging> 
    <version>1.0-SNAPSHOT</version> 
    <name>Spring MVC Webapp</name> 
    <dependencies> 
     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>3.8.1</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-webmvc</artifactId> 
      <version>4.2.3.RELEASE</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework.data</groupId> 
      <artifactId>spring-data-cassandra</artifactId> 
      <version>1.4.5.RELEASE</version> 
     </dependency> 

     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-jdbc</artifactId> 
      <version>4.3.3.RELEASE</version> 
     </dependency> 


     <dependency> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-api</artifactId> 
      <version>1.7.5</version> 
     </dependency> 
     <dependency> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-simple</artifactId> 
      <version>1.7.5</version> 
     </dependency> 
    </dependencies> 


    <repositories> 
     <repository> 
      <id>spring-milestone</id> 
      <name>Spring Maven MILESTONE Repository</name> 
      <url>http://repo.spring.io/libs-milestone</url> 
     </repository> 
    </repositories> 


    <build> 
     <finalName>SpringMVCApp</finalName> 
     <pluginManagement> 
      <plugins> 
       <plugin> 
        <groupId>org.apache.tomcat.maven</groupId> 
        <artifactId>tomcat7-maven-plugin</artifactId> 
        <version>2.2</version> 
        <configuration> 
         <path>/</path> 
         <contextReloadable>true</contextReloadable> 
        </configuration> 
       </plugin> 
      </plugins> 
     </pluginManagement> 
    </build> 
</project>

编辑2： @Ceki，这里是MVN依赖性：树输出...

[INFO] com.myfakecompany.project:SpringApp:war:1.0-SNAPSHOT 
[INFO] +- junit:junit:jar:3.8.1:test 
[INFO] +- org.springframework:spring-webmvc:jar:4.2.3.RELEASE:compile 
[INFO] | +- org.springframework:spring-beans:jar:4.2.3.RELEASE:compile 
[INFO] | +- org.springframework:spring-context:jar:4.2.3.RELEASE:compile 
[INFO] | | \- org.springframework:spring-aop:jar:4.2.3.RELEASE:compile 
[INFO] | |  \- aopalliance:aopalliance:jar:1.0:compile 
[INFO] | +- org.springframework:spring-core:jar:4.2.3.RELEASE:compile 
[INFO] | | \- commons-logging:commons-logging:jar:1.2:compile 
[INFO] | +- org.springframework:spring-expression:jar:4.2.3.RELEASE:compile 
[INFO] | \- org.springframework:spring-web:jar:4.2.3.RELEASE:compile 
[INFO] +- org.springframework.data:spring-data-cassandra:jar:1.4.5.RELEASE:compile 
[INFO] | +- org.springframework.data:spring-cql:jar:1.4.5.RELEASE:compile 
[INFO] | | \- com.google.guava:guava:jar:19.0:compile 
[INFO] | +- org.springframework.data:spring-data-commons:jar:1.12.5.RELEASE:compile 
[INFO] | +- com.datastax.cassandra:cassandra-driver-dse:jar:2.1.7.1:compile 
[INFO] | | \- com.datastax.cassandra:cassandra-driver-core:jar:2.1.7.1:compile 
[INFO] | |  +- io.netty:netty-handler:jar:4.0.27.Final:compile 
[INFO] | |  | +- io.netty:netty-buffer:jar:4.0.27.Final:compile 
[INFO] | |  | | \- io.netty:netty-common:jar:4.0.27.Final:compile 
[INFO] | |  | +- io.netty:netty-transport:jar:4.0.27.Final:compile 
[INFO] | |  | \- io.netty:netty-codec:jar:4.0.27.Final:compile 
[INFO] | |  \- com.codahale.metrics:metrics-core:jar:3.0.2:compile 
[INFO] | \- org.slf4j:jcl-over-slf4j:jar:1.7.21:runtime 
[INFO] +- org.springframework:spring-jdbc:jar:4.3.3.RELEASE:compile 
[INFO] | \- org.springframework:spring-tx:jar:4.3.3.RELEASE:compile 
[INFO] +- org.slf4j:slf4j-api:jar:1.7.5:compile 
[INFO] \- org.slf4j:slf4j-simple:jar:1.7.5:compile

来源

2016-12-29 crayon_box

根据链接http://www.slf4j.org/codes.html#StaticLoggerBinder，您应该只使用一个依赖项，而不是两个...您应该只包含slf4j-simple在您的pom.xml中 – ryekayo

你可以添加“mvn依赖：树”的输出到你的问题？ – Ceki

@ryekayo声明slf4j-api完全可以。但是，它会被slf4j-simple声明所吸引。因此，如果声明了slf4j-simple之类的绑定，则slf4j-api是多余的。 – Ceki

更新：我的记录器正在工作，尽管我不确定正是我所做的，使工作的两两件事之一：1）在项目结构 - >文物]标签，我点击添加新的和补充新的神器然后删除它或2）重新启动的应用程序和co mputer。对不起，我无法确定解决方案到底是什么。

来源

2017-01-05 21:03:44

SLF4J记录器绑定不工作

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