"在 Gradle 问题中使用 MySQL JDBC 驱动程序？"

Question

I am trying to learn how to use Gradle with Java and am starting a brand new project. I am trying to connect to a database.

plugins {
    id 'java'
}

repositories {
    mavenCentral()
}

jar {
    manifest {
        attributes 'Main-Class': 'com.brian.Application'
    }
}

dependencies {
    testImplementation 'junit:junit:4.13.2'
    implementation 'mysql:mysql-connector-java:8.0.25'
}

group 'org.brian'
version '1.0-SNAPSHOT'

Answer 1

This is because Java does not know where to load the MySQL driver class from. The JAR created by your build does not have a Class-Path<\/code> header that mentions the JAR files (like the MySQL Connector\/J JAR) that it needs to run.

jar {
    manifest {
        attributes(
                "Main-Class": "com.brian.Application",
                'Class-Path': configurations.runtimeClasspath.files.collect { it.name }.join(' ')
        )
    }
}