不依赖 Spring 的简单 Main 工程

1. 搭建一个没有 spring 的工程

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    kotlin("jvm") version "1.8.10"
    application
}

group = "com.demo"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    testImplementation(kotlin("test"))
}

tasks.test {
    useJUnitPlatform()
}

tasks.withType<KotlinCompile> {
    kotlinOptions.jvmTarget = "11"
}

application {
    mainClass.set("MainKt")
}

2. 打包成可执行 jar

tasks.jar {
    manifest {
        attributes["Main-Class"] = application.mainClass
    }
    // To avoid the duplicate handling strategy error
    duplicatesStrategy = DuplicatesStrategy.EXCLUDE

    // To add all of the dependencies
    from(sourceSets.main.get().output)

    dependsOn(configurations.runtimeClasspath)
    from({
        configurations.runtimeClasspath.get().filter { it.name.endsWith("jar") }.map { zipTree(it) }
    })
}

3. 运行