如何使用 Gradle 添加默认的 JVM 参数 [英] How do I add default JVM arguments with Gradle

问题描述

当使用 Gradle 构建时，我需要将默认的 JVM 选项添加到我的 jar 中.从我得到的文档中我必须设置:

I need to add default JVM options to my jar, when build with Gradle. From the documentation I got that I have to set:

applicationDefaultJvmArgs = ["-Djavafx.embed.singleThread=true"]

我对 Gradle 没有太多经验，编写 build.gradle 文件的开发人员编写的文件与大多数网站提供的示例不同.

I have not much experience with Gradle and the developer that wrote the build.gradle file wrote it different from what most websites give as examples.

这是build.gradle:

Here is the build.gradle:

apply plugin: 'java'
apply plugin: 'eclipse'

version = '0.1'

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.+'
    compile 'placeholder'
}

task release(type: Jar) {
    manifest {
        attributes("Implementation-Title": "placeholder",
                "Implementation-Version": version,
                'Main-Class': 'placeholder.Application')
    }
    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }

    with jar
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.2.1'
}

我不知道把参数放在哪里.我尝试将它们放在不同的位置，但我总是得到:

I don't know where to put the arguments. I tried putting them in different locations, but I always get:

A problem occurred evaluating root project 'placeholder'.
> No such property: applicationDefaultJvmArgs for class: org.gradle.api.tasks.bundling.Jar_Decorated

非常感谢，约翰尼

推荐答案

在我的脑海中，我可以想到 2 个选项:

From the top of my head I can think of 2 options:

选项 1:按照@Ethan 所说的去做，它可能会奏效:

package placeholder;

//your imports

public class Application{
  static {
      System.getProperties().set("javafx.embed.singleThread", "true");  
  }
  // your code
  public static void main(String... args){
    //your code
  }
}

选项 2:使用应用程序插件 + 默认 jvm 值

build.gradle:

build.gradle:

apply plugin: 'application'
//your code
applicationDefaultJvmArgs = ["-Djavafx.embed.singleThread=true"]

现在您可以通过两种方式运行代码:

Now you can run your code 2 ways:

来自 gradle

$gradle run

来自发行版(脚本).从应用程序插件将提供的生成脚本中:

From distribution(script). from the generated script that the application plugin will provide:

$gradle clean build distZip

然后 gradle 将在 ${your.projectdir}/build 下的某处生成一个 zip 文件.找到 zip 然后解压缩它，在 /bin 下你会找到一个 ${yourproject}.bat 和 ${yourproject} 可执行文件.一个用于 Linux/mac/unix (${yourproject}) 另一个用于 windows (${yourproject.bat})

Then gradle will generate a zip file somewhere under ${your.projectdir}/build. Find the zip then unzip it and under /bin you'll find a ${yourproject}.bat and ${yourproject} executables. One is for Linux/mac/unix (${yourproject}) the other one is for windows (${yourproject.bat})

选项 3(Android 开发者):使用 gradle.properties 设置 jvm 参数

# Project-wide Gradle settings.

# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.

# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html

# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
# Default value: -Xmx1024m -XX:MaxPermSize=256m
# org.gradle.jvmargs=-Xmx1024m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 

# You can setup or customize it according to your needs and combined with the above default value.
org.gradle.jvmargs=-Djavafx.embed.singleThread=true

有关如何在 docs.gradle.org

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