在 Kotlin 中使用 Gradle for Spring cloud 构建可执行 Jar 文件 - 无清单文件

Question

我想为我的 Spring Cloud 项目构建一个可执行的 jar 文件，我尝试了几个选项，但没有一个有效。 我总是得到java找不到

main

类的结果。 我尝试创建一个工件并构建它，我得到了

没有主要清单属性，在 ....jar 中

如果我从 gradle 任务 (jar) 创建 jar，并从 libs 文件夹运行 jar，我会收到此错误

错误：无法找到或加载主类 com.thyme.business_data.BusinessDataApplicationKt 导致：java.lang.ClassNotFoundException：com.thyme.business_data.BusinessDataApplicationKt

我在 gradle 中添加了所需的设置，但这并没有改变任何东西 我的设置有什么问题吗？ 这是我的 gradle

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

plugins {
    application
    id("org.springframework.boot") version "3.2.0"
    id("io.spring.dependency-management") version "1.1.4"
    kotlin("jvm") version "1.9.20"
    kotlin("plugin.spring") version "1.9.20"
}

group = "com.thyme"
version = "1.0.0"

java {
    sourceCompatibility = JavaVersion.VERSION_17
}

repositories {
    mavenCentral()
    maven { url = uri("https://repo.spring.io/milestone") }
}

extra["springCloudVersion"] = "2023.0.0-RC1"

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-data-couchbase-reactive")
    implementation("org.springframework.boot:spring-boot-starter-rsocket")
    implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
    implementation("org.springframework.cloud:spring-cloud-starter")
    implementation("com.fasterxml.jackson.core:jackson-databind")
    testImplementation("com.fasterxml.jackson.core:jackson-databind")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("io.projectreactor:reactor-test")
}

dependencyManagement {
    imports {
        mavenBom("org.springframework.cloud:spring-cloud-dependencies:${property("springCloudVersion")}")
    }
}

tasks.withType<KotlinCompile> {
    kotlinOptions {
        freeCompilerArgs += "-Xjsr305=strict"
        jvmTarget = "17"
    }
}

tasks.withType<Test> {
    useJUnitPlatform()
}

application {
    mainClass = "com.thyme.business_data.BusinessDataApplicationKt"
}

tasks.withType<Jar> {
    // Otherwise you'll get a "No main manifest attribute" error
    manifest {
        attributes["Main-Class"] = application.mainClass
    }
    // To avoid the duplicate handling strategy error
    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
    // To add all the dependencies
    from(sourceSets.main.get().output)
    dependsOn(configurations.runtimeClasspath)
    from({
        configurations.runtimeClasspath.get().filter { it.name.endsWith("jar") }.map { zipTree(it) }
    })
}

Answer 1

我是这样解决的 但我必须先删除所有

MANIFEST.MF

文件。清理项目，然后从 gradle 运行 BootJar。完成！

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

plugins {
    id("org.springframework.boot") version "3.2.0"
    id("io.spring.dependency-management") version "1.1.4"
    kotlin("jvm") version "1.9.20"
    kotlin("plugin.spring") version "1.9.20"
}

group = "com.thyme"
version = "1.0.0"

java {
    sourceCompatibility = JavaVersion.VERSION_17
}

repositories {
    mavenCentral()
    maven { url = uri("https://repo.spring.io/milestone") }
}

extra["springCloudVersion"] = "2023.0.0-RC1"

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-data-couchbase-reactive")
    implementation("org.springframework.boot:spring-boot-starter-rsocket")
    implementation("io.projectreactor.kotlin:reactor-kotlin-extensions")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
    implementation("org.springframework.cloud:spring-cloud-starter")
    implementation("com.fasterxml.jackson.core:jackson-databind")
    testImplementation("com.fasterxml.jackson.core:jackson-databind")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("io.projectreactor:reactor-test")
}

dependencyManagement {
    imports {
        mavenBom("org.springframework.cloud:spring-cloud-dependencies:${property("springCloudVersion")}")
    }
}

tasks.withType<KotlinCompile> {
    kotlinOptions {
        freeCompilerArgs += "-Xjsr305=strict"
        jvmTarget = "17"
    }
}

tasks.withType<Test> {
    useJUnitPlatform()
}

tasks.jar {
    manifest {
        attributes["Main-Class"] = "com.thyme.business_data.BusinessDataApplicationKt"
    }
}