java - 无法为扩展名“application”设置未知属性 'mainClass'

Question

我在项目中使用的是Gradle 6.1版。
下面给出了该项目的 build.gradle :

plugins {
    id 'application'
}

application {
    mainClass = 'com.mytestproject.Main'
}

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

group 'com.mytestproject'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

但是，当我运行此命令 ./gradlew assemble时，它给了我下面的错误:

./gradlew assemble

FAILURE: Build failed with an exception.

* Where:
Build file '/com/myproject/build.gradle' line: 6

* What went wrong:
A problem occurred evaluating root project 'JavaTestProject'.
> Could not set unknown property 'mainClass' for extension 'application' of type org.gradle.api.plugins.internal.DefaultJavaApplication.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 484ms

Answer 1

修改 build.gradle 到此:

apply plugin: "application"

mainClassName = "com.mytestproject.Main"

sourceCompatibility = 1.8
targetCompatibility = 1.8

group 'com.mytestproject'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

运行以下命令: ./gradlew build