You can open this sample in an IDE that supports Gradle.

This sample shows how a Spring Boot Web application can be built with Gradle. The application was generated using the Spring Initializr.

app/build.gradle.kts
plugins {
    id("org.springframework.boot") version("2.7.8")
    java
}

version = "1.0.2"
group = "org.gradle.samples"

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
}

repositories {
    mavenCentral()
}

dependencies {
    implementation(platform("org.springframework.boot:spring-boot-dependencies:2.7.8"))

    implementation("org.springframework.boot:spring-boot-starter")
    testImplementation("org.springframework.boot:spring-boot-starter-test") {
        exclude(mapOf("group" to "org.junit.vintage", "module" to "junit-vintage-engine"))
    }
    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
}

tasks.named<Test>("test") {
    useJUnitPlatform()
}
app/build.gradle
plugins {
	id 'org.springframework.boot' version '2.7.8'
	id 'java'
}

version = '1.0.2'
group = 'org.gradle.samples'

java {
	sourceCompatibility = JavaVersion.VERSION_1_8
}

repositories {
	mavenCentral()
}

dependencies {
    implementation platform('org.springframework.boot:spring-boot-dependencies:2.7.8')

	implementation 'org.springframework.boot:spring-boot-starter'
	testImplementation('org.springframework.boot:spring-boot-starter-test') {
		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
	}
    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}

tasks.named('test', Test) {
	useJUnitPlatform()
}

To build and run the application:

$ ./gradlew bootRun

> Task :app:bootRun

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.1.RELEASE)

2019-11-12 22:14:43.819  INFO 1389 --- [           main] o.g.samples.SpringBootDemoApplication    : Starting SpringBootDemoApplication on localhost with PID 1389 (/home/user/build/classes/java/main started by user in /home/user)
2019-11-12 22:14:43.820  INFO 1389 --- [           main] o.g.samples.SpringBootDemoApplication    : No active profile set, falling back to default profiles: default
2019-11-12 22:14:44.108  INFO 1389 --- [           main] o.g.samples.SpringBootDemoApplication    : Started SpringBootDemoApplication in 5.537 seconds (JVM running for 5.8)

BUILD SUCCESSFUL
3 actionable tasks: 3 executed

For more information, we suggest reading Getting Started with Gradle. You can also find Spring Boot related information inside the guides provided by the Spring team.