maven中的sl4j依賴問題

SLF4J: Failed to load class 「org.slf4j.impl.StaticLoggerBinder

最近寫新項目用maven引入sl4j老是提示這個錯誤，查了一下一些是由於引入的包衝突。好比：https://www.jianshu.com/p/b562b7ff499f

這裏寫的比較詳細：

slf4j-log4j12.jar (for log4j logging),
slf4j-jdk14.jar (for Java logging),
slf4j-jcl.jar (if you’re using Commons logging)
logback-classic.jar (for logback logging).

以上的包引入一種便可

個人一開始覺得是包衝突，而後經過依賴樹命令發現是一個低級錯誤，引入的sl4j包的scope是test級別的，而後運行就出錯了。直接去掉便可，不寫<scope>標籤默認compile級別。

D:\work\eclipse8\abc\share>mvn dependency:tree
[INFO] Scanning for projects...
[INFO]
[INFO] ---------------------------< xgame:sharing >----------------------------
[INFO] Building sharing 0.0.1
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ sharing ---
[INFO] xgame:sharing:jar:0.0.1
[INFO] +- io.netty:netty-all:jar:4.1.38.Final:compile
[INFO] +- commons-lang:commons-lang:jar:2.6:compile
[INFO] +- org.mybatis:mybatis:jar:3.2.7:compile
[INFO] +- com.google.protobuf:protobuf-java:jar:2.5.0:compile
[INFO] +- com.google.guava:guava:jar:19.0:compile
[INFO] +- commons-codec:commons-codec:jar:1.13:compile
[INFO] +- commons-beanutils:commons-beanutils:jar:1.8.3:compile
[INFO] |  \- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] +- com.lmax:disruptor:jar:3.3.7:compile
[INFO] +- org.quartz-scheduler:quartz:jar:2.2.3:compile
[INFO] |  +- c3p0:c3p0:jar:0.9.1.1:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] +- net.sf.json-lib:json-lib:jar:jdk15:2.4:compile
[INFO] |  +- commons-collections:commons-collections:jar:3.2.1:compile
[INFO] |  \- net.sf.ezmorph:ezmorph:jar:1.0.6:compile
[INFO] +- com.typesafe:config:jar:1.3.4:compile
[INFO] +- mysql:mysql-connector-java:jar:5.1.8:compile
[INFO] \- org.slf4j:slf4j-log4j12:jar:1.7.26:test
[INFO]    \- log4j:log4j:jar:1.2.17:test
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.907 s
[INFO] Finished at: 2019-08-16T00:21:52+08:00
[INFO] ------------------------------------------------------------------------

查maven依賴版本的時候，默認帶了scope爲test。

<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.26</version>
    <scope>test</scope>
</dependency>