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wiverson/maven-jpackage-template: Sample project illustrating building nice, sma ...

原作者: [db:作者] 来自: 网络 收藏 邀请

开源软件名称(OpenSource Name):

wiverson/maven-jpackage-template

开源软件地址(OpenSource Url):

https://github.com/wiverson/maven-jpackage-template

开源编程语言(OpenSource Language):

Java 94.5%

开源软件介绍(OpenSource Introduction):

Java + Maven + GitHub Actions = Native Desktop Apps

JavaFX or Swing + jpackage + Maven template project for generating native desktop applications.

Goal

  1. Build nice, small cross-platform JavaFX or Swing desktop apps with native installers
    • Apx 30-40mb .dmg, .msi and .deb installers - check out the example builds in releases.
    • Note that the macOS builds are not signed, and therefore macOS will report as damaged/unopenable. There are a few ways to deal with this, depending on your situation.
  2. Just use Maven - no shell scripts required.
    • Use standard Maven dependency system to manage dependencies
  3. Generate macOS (.dmg), Windows (.msi) and Unix (e.g. deb/rpm) installers/packages automatically with GitHub Actions.

Overview

This template uses a Maven plugin to generate a custom JVM and installer package for a JavaFX application. It can easily be adapted to work with Swing instead.

Requirements

The project includes GitHub Actions which automatically generate macOS, Windows, and Linux installers.

The generated installers come in at around 30-40mb. The example source in the project includes demonstrations of several native desktop features - for example, drag-and-drop from the Finder/Explorer, as well as a few macOS Dock integration examples. Removing the code and the demonstration dependencies gets a "Hello World" build size closer to 30mb than 40mb.

Key Features

Here are few cool things in this template:

  • Only uses Java and Maven. No shell scripts required.
  • Includes sample GitHub Actions to build macOS, Windows and Linux installers
  • Demonstrates setting the application icon
  • Builds a .dmg on macOS, .msi on Windows, and .deb on Linux
  • Bundles the JavaFX SDK & modules to simplify getting started.
    • Just delete the JavaFX stuff if you are using Swing
  • Template includes several examples of JavaFX / native desktop integration
    • Drag & drop with Finder / Explorer
    • Change the Dock icon dynamically on macOS
    • Menu on the top for macOS, in the window itself on Windows
    • Request user attention (bouncing dock icon) on macOS
  • Java + Java modules are used to build a trimmed JVM (a few thoughts on Java modules)
  • The user application uses ordinary Maven dependencies and classpath to run the application
    • Nice illustration of how to use jlink to build a slim JVM, point jpackage at that JVM and still use the ordinary classpath for the application

Once you get started, you might find these lists of tutorials, tools, libraries for JavaFX and general Java desktop integration helpful.

Version Numbering

Usually you want a "marketing version" of an app as released to customers, and a "developer version" for use in internal testing. For example, to the end user it's just "Windows 11" but there are countless build numbers for all the different versions of Windows 11.

The end-user value is set in the pom.xml as app.version. This value is updated to use a GitHub environment variable when the installers are run on GitHub.

If you look in the src/main/resources you will see a version.txt file. This file has information in it that will be useful for creating a developer build UI. You might want to convert this to a properties file or a JSON file and display the information in your about UI.

Does this work with Apple Silicon aka M1?

Yes, although as of this writing I don't believe there are GitHub Action runners that support M1. But building locally on my M1 laptop works great and generates native M1 builds.

I downloaded the macOS release and it won't open - the Finder says it's damaged!

Yup, it's quarantined because it's not signed. You can override the quarantine via a command-line option. See the next Q on macOS signing, notarization, and stapling.

Does this support macOS signing, notarization, and stapling?

Yes, there is a GitHub Action and a Maven profile to assist with setting all of this up for macOS applications.

For more information, see the documentation on getting macOS signing/notarization/stapling set up. It won't work out of the box, as you need to sign up for an Apple Developer account, add a bunch of GitHub Secrets and update the pom.xml.

What about Linux?

The JavaFX builds include several other architectures, including aarch64 and arm32. In theory, you should be able to add those just like the other builds. Haven't tested it though. Feel free to post in the discussion section if you are using Linux.

Can I Use this with Swing instead of JavaFX?

tl;dr absolutely.

It's actually a lot easier to use Swing instead of JavaFX, as Swing is built in to the JDK and doesn't require fiddling with Java modules.

Just delete the JavaFX stuff, including the JavaFX modules and add a Swing main class instead. If you are reasonably familiar with Maven this shouldn't be very hard to do.

I highly recommend the FlatLaf as a must use with Swing. That look-and-feel plus designers such as the IntelliJ GUI Designer or JFormDesigner can work very well, arguably with an easier learning curve than JavaFX.

In particular, delete the following directories:

/javafx-linux-x64_64
/javafx-osx-x86_64
/javafx-os-aarch_64
/javafx-windows-x86_64

Changes to the pom.xml:

  1. Remove the javafx modules from the jvm.modules property
  2. Remove the javafx.version property.
  3. Remove the three org.openjfx dependencies
  4. Remove the configuration/excludeGroupIds section from the maven-dependency-plugin
  5. Remove javafx-maven-plugin from the plugins list
  6. Remove the modulePath delcaration from the jtoolprovider-plugin execution/configuration

Usage

Once everything is installed (see below) it's really easy to use:

To generate an installer, just run...

mvn clean install

To do everything up until the actual installer generation (including generating the custom JVM)...

mvn clean package

Installation

  1. Install OpenJDK Java 17 or Oracle Java 17.
    • Verify by opening a fresh Terminal/Command Prompt and typing java --version.
  2. Install Apache Maven 3.6.3 or later and make sure it's on your path.
    • Verify this by opening a fresh Terminal/Command Prompt and typing mvn --version.
  3. macOS: verify XCode is installed and needed agreements accepted.
    • Launch XCode and accept the license, or verify in Terminal with the command sudo xcodebuild -license.
  4. Windows: install Wix 3 binaries.
    • Installing Wix via the installer should be sufficient for jpackage to find it.
  5. Clone/download this project.
  6. Final step: run mvn clean install from the root of the project to generate the target\TestApp.dmg or target\TestApp.msi (installer).
    • Note that the actual generated installer will include a version number in the file name
    • For reference, here is a complete run log for a successful run.

Because these builds use stripped down JVM images, the generated installers are in the 30-40mb range.

On macOS you should add signing to avoid error messages related to the security system(s).

Debugging

  1. If the built app fails to run, make sure the JavaFX app runs as expected first by using the mvn javafx:run command. This will run the app in development mode locally, and you should see standard System.out debug lines appear in your console.
  2. Check the Maven build logs (of course).
  3. By default, the app will generate debug*****.log files containing the output from System.out. You can look at the main method of BaseApplication.java to see how this is done. For a production app, you would want to place these logs in the correct OS specific location. On a Unix machine you can tail -f the log normally.

OS-Specific Notes

Linux

There are a LOT of different flavors of Linux out there. I've provided the Ubuntu build more as an example of how the GitHub Action works, but I can't diagnose or trouble-shoot your Linux build (unless it's a consulting engagement). Feel free to post these in discussions!

I will note, however, that much of the Linux trouble I have seen comes from some of the included integration demonstrations. Try commenting out the loading of demo plugins in BaseApplication.java - specifically the loop that loads the plugins.

In theory, the Exception handler in the plugin loader code should catch the exceptions. In practice, on a few flavors of Linux something dies with a native exception that takes it all down.

I get more support/issues for Linux builds than anything else, often for distros I've never heard of... which is cool but not something I'm really set up to deal with (short of paid consulting). That said, every Linux support issue so far has been resolved pretty easily by folks posting Maven or application log files in the discussion group. No promises, but go forth and post!

Help

Problems? Make sure everything is installed and working right!

  • Compiler not recognizing the --release option? Probably on an old JDK.
  • Can't find jdeps? Probably on an old JDK.
  • Can't find jpackage on Java 15? Probably haven't set up your system to allow Java 15 to enable preview packages.
  • Unrecognized option: --add-modules jdk.incubator.jpackage
    • Could be a left-over MAVEN_OPTS setting when you switched from Java 15 to Java 16/17
    • If you are still on Java 15, you may not have MAVEN_OPTS set correctly.

If you need consulting support, feel free to reach out at ChangeNode.com.

Q&A

If you are using the template, browsing the Q&A is highly recommended.




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