如何在Heroku平台同时部署.jar文件与.properties文件？

Got it, let's work through getting both your server.jar and server.properties deployed to Heroku properly. The heroku deploy:jar command only uploads the specific JAR you specify, which is why your properties file didn't come along for the ride. Here are two reliable, common approaches to fix this:

Option 1: Package the Properties File Into Your JAR #

If you don't mind bundling your config directly with the application, this is the simplest method. Most Java build tools (Maven, Gradle) automatically include files from the src/main/resources directory in the final JAR.

• For Maven projects:

  1. Move your server.properties into the src/main/resources folder of your project.
  2. Rebuild your JAR with mvn clean package—this embeds the properties file inside the JAR.
  3. Deploy as before with heroku deploy:jar server.jar --app myapp.
  4. In your code, read the properties file using the classpath (e.g., getClass().getResourceAsStream("/server.properties")).

• For Gradle projects:

  1. Place server.properties in src/main/resources.
  2. Run ./gradlew build to generate the JAR with the embedded config.
  3. Deploy using the same heroku deploy:jar command.

Option 2: Deploy via Git (Keep JAR and Properties Separate) #

If you want to keep the JAR and properties file separate (maybe for easier config updates without rebuilding the JAR), use Git to deploy all files together.

1. Create a new empty directory on your local machine.
2. Copy your server.jar and server.properties into this directory.
3. Create a Procfile (no file extension) in the same directory. Add a line defining how to start your app—adjust the command to match how your app reads the properties file:

   web: java -jar server.jar --config=server.properties
   

   Note: Replace --config=server.properties with the actual argument your application expects to load the properties file.
4. Initialize a Git repo in this directory:

   git init
   git add .
   git commit -m "Add JAR and config file"
   

5. Link the repo to your Heroku app:

   heroku git:remote -a myapp
   

6. Deploy to Heroku:

   git push heroku main
   

Heroku will detect the Procfile and deploy all files in your repo, including the properties file.

Quick Notes #

• If you previously used heroku deploy:jar, switching to Git deployment will overwrite the existing app on Heroku—this is expected behavior.
• If your server.properties contains sensitive data (like API keys), consider using Heroku's config vars instead (set them with heroku config:set KEY=value and read them as environment variables in your code) to avoid committing sensitive info to Git.

内容的提问来源于stack exchange，提问作者Maximax67