Using envvault with Java/Spring Boot

Note: Please ensure that you have completed the previous steps

Prerequisites

Java Development Kit (JDK) installed
envvault CLI tool installed
An existing Spring Boot project

Usage

Running Your Application

To run your Spring Boot application with environment variables from envvault:

$ envvault run --env=dev ./mvnw spring-boot:run

Caching Environment Variables

For better performance, you can cache your environment variables:

$ envvault run --env=dev -c -- ./mvnw spring-boot:run

Example Implementation

Here is how to set up a basic Spring Boot application with envvault:

// Application.java
package com.example.demo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
public class Application {
    // Your environment variables are automatically loaded
    @Value("${PORT:8080}")
    private String port;

    @Value("${DB_URL}")
    private String dbUrl;

    @GetMapping("/")
    public String hello() {
        return "Hello from envvault!";
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

// application.properties
server.port=${PORT:8080}
spring.datasource.url=${DB_URL}