[英]How to use Kotlin in AppEngine projects using Gradle
Like the title says, how can I use Kotlin when developing AppEngine projects? 就像标题所说,在开发AppEngine项目时如何使用Kotlin? I'm using IntelliJ/Android Studio with Gradle as my build tool.
我正在使用带有Gradle的IntelliJ / Android Studio作为我的构建工具。
Since AppEngine executes compiled .class files, it doesn't care what JVM language produced these. 由于AppEngine执行编译的.class文件,因此它不关心JVM语言产生的内容。 This means we can use Kotlin.
这意味着我们可以使用Kotlin。
One way to do this is by using Gradle and the Gradle App Engine plugin . 一种方法是使用Gradle和Gradle App Engine插件 。 Create a project with a
build.gradle
that looks something like this . 使用看起来像这样的
build.gradle
创建一个项目。 Then add the Kotlin dependencies and apply the plugin. 然后添加Kotlin依赖项并应用插件。 The final build file looks something like this:
最终的构建文件看起来像这样:
buildscript {
ext.kotlin_version = '1.0.6' //replace with latest Kotlin version
repositories {
mavenCentral()
}
dependencies {
classpath 'com.google.appengine:gradle-appengine-plugin:1.9.32' //Replace with latest GAE plugin version
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
repositories {
mavenCentral();
}
apply plugin: 'java'
apply plugin: 'kotlin'
apply plugin: 'war'
apply plugin: 'appengine'
sourceCompatibility = JavaVersion.VERSION_1_7
targetCompatibility = JavaVersion.VERSION_1_7
dependencies {
appengineSdk 'com.google.appengine:appengine-java-sdk:1.9.32' //Replace with latest GAE SDK version
compile 'javax.servlet:servlet-api:2.5'
compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}
appengine {
downloadSdk = true
appcfg {
oauth2 = true
}
}
Since M11 you don't need to have a separate directory for Kotlin files so you can just add your .kt files to src/main/java
. 从M11开始,您不需要为Kotlin文件创建单独的目录,因此您只需将.kt文件添加到
src/main/java
。
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