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通过jpackage打包无法找到或加载主类

jpackage java

Chris · 技术社区 · 3 年前

使用 jpackage 我找不到电话 pkg 在macOS上运行。安装按预期进行,但当我启动安装的应用程序时,它会启动,然后立即停止。

试图通过CLI启动它,它会抛出

Error: Could not find or load main class com.example.Application
Caused by: java.lang.ClassNotFoundException: com.example.Application

我通过了考试 MainClass 作为论据 com.example.Application ,我可以在下面安装的捆绑包中看到它 Contents/app/example.jar

使用Gradle插件 id "org.panteleyev.jpackageplugin" version "1.3.1" 要构建本机安装程序,请执行以下操作:

def os = org.gradle.internal.os.OperatingSystem.current()
def pkgType = os.windows ? 'msi' : os.linux ? 'deb' : 'pkg'
def inputDir = "$buildDir/input"

task copyDependencies (type: Copy) {
    from configurations.runtimeClasspath
    into inputDir
}

task copyJar (type: Copy) {
    from tasks.jar
    into inputDir
}

jpackage {
    dependsOn clean
    dependsOn bootJar
    dependsOn copyDependencies
    dependsOn copyJar

    type = pkgType

    input = inputDir
    destination = "$buildDir/dist"

    appName = 'Example'
    vendor = 'com.example'

    mainJar = tasks.jar.getArchiveFileName().get()
    mainClass = 'com.example.Application'

    javaOptions = ['-Dfile.encoding=UTF-8']
}

当通过IntelliJ/CLI启动时,jar运行正常。

我还需要在这里做什么?

0 回复 | 直到 3 年前

Chris 3 年前

因为我正在尝试运行Springboot应用程序,所以诀窍是不要像通常那样尝试启动主类,而是使用 org.springframework.boot.loader.JarLauncher

这在一篇文章中得到了更恰当的解释 blog post 春天队

因此,Springboot的完整工作示例如下所示:

plugins {
    id 'org.springframework.boot' version '2.6.0-SNAPSHOT'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'org.panteleyev.jpackageplugin' version '1.3.1'

    id 'application'
}

group = 'space.forloop'
version = '1.0.6'

compileJava.options.encoding = 'UTF-8'
compileTestJava.options.encoding = 'UTF-8'
javadoc.options.encoding = 'UTF-8'


repositories {
    mavenCentral()
    maven { url 'https://repo.spring.io/milestone' }
    maven { url 'https://repo.spring.io/snapshot' }
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(17)
    }
}

application {
    mainClass = 'com.example.Application'
    applicationDefaultJvmArgs = ["-Dfile.encoding=UTF-8"]
}

bootJar {
    manifest {
        attributes 'Implementation-Version': "${project.version}"
        attributes 'Implementation-Title': "${project.name}"
    }
}

// Not required but useful if you want to configure a little more.
def os = org.gradle.internal.os.OperatingSystem.current()
def pkgType = os.windows ? 'msi' : os.linux ? 'deb' : 'pkg'

jpackage {
    dependsOn "bootJar"

    type = pkgType

    input = "${buildDir}/libs"
    destination = "${buildDir}/dist"

    appName = 'Example'
    vendor = 'com.example'

    mainJar = bootJar.archiveFileName.get()
    mainClass = "org.springframework.boot.loader.JarLauncher"

    javaOptions = ['-Dfile.encoding=UTF-8']

    macPackageName = bootJar.archiveBaseName.get()
}

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