解决了...用Maven再添加一个slf4j-jdk14的依赖就行...
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version>1.7.25</version>
</dependency>
"E:\Program Files\OpenJDK\jdk-13.0.1\bin\java.exe" --enable-preview "-javaagent:E:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.2.4\lib\idea_rt.jar=5980:E:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.2.4\bin" -Dfile.encoding=UTF-8 -classpath F:\Intellij-workspace\JDBC\target\classes;C:\Users\11479.m2\repository\com\zaxxer\HikariCP\3.4.1\HikariCP-3.4.1.jar;C:\Users\11479.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\11479.m2\repository\mysql\mysql-connector-java\8.0.18\mysql-connector-java-8.0.18.jar;C:\Users\11479.m2\repository\com\google\protobuf\protobuf-java\3.6.1\protobuf-java-3.6.1.jar;C:\Users\11479.m2\repository\org\slf4j\slf4j-jdk14\1.7.25\slf4j-jdk14-1.7.25.jar com.bk.jdbc.test.ConnTest
11月 19, 2019 6:41:18 下午 com.zaxxer.hikari.HikariDataSource <init>
信息: HikariPool-1 - Starting...
11月 19, 2019 6:41:19 下午 com.zaxxer.hikari.HikariDataSource <init>
信息: HikariPool-1 - Start completed.
Connection established.
Process finished with exit code 0