当我运行一个sparkjava demo的时候，出现了下面的问题：

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


程序见官网：http://sparkjava.com/documentation#getting-started

maven dependency为：

<dependency>
    <groupId>com.sparkjava</groupId>
    <artifactId>spark-core</artifactId>
    <version>2.7.1</version>
</dependency>


我运行的代码为：

import static spark.Spark.*;

public class HelloWorld {
    public static void main(String[] args) {
        get("/hello", (req, res) -> "Hello World");
    }
}


右键 run as,结果就莫名其妙的报错了。然后加入了以下的依赖，运行成功了，感谢帮助我的实验室同学：

<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-simple</artifactId>
    <version>1.7.13</version>
    <scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.13</version>
    <scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-nop -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-nop</artifactId>
    <version>1.7.13</version>
    <scope>compile</scope>
</dependency>

参考文献


[1].SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error.https://stackoverflow.com/questions/11916706/slf4j-failed-to-load-class-org-slf4j-impl-staticloggerbinder-error