Gradle vs. Maven: Which Build Tool for Java Projects?

In the Java ecosystem, there are two dominant build tools: Maven and Gradle. Both manage dependencies, compile code, run tests, and produce deployable artifacts. For PHP developers, Composer is the closest comparison — but Maven and Gradle do significantly more than Composer: they are full-fledged build systems.

Maven: Declarative and Convention-Based¶

Maven was introduced in 2004 and remains widely used today. It is based on the principle of "Convention over Configuration" — if you follow the standard directory structure, there is very little to configure.

pom.xml — The Heart of the Project¶

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 ...">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>my-app</artifactId>
    <version>1.0.0</version>
    <packaging>jar</packaging>

    <properties>
        <java.version>21</java.version>
        <spring-boot.version>3.2.0</spring-boot.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.0</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Maven Build Lifecycle¶

Maven uses a fixed lifecycle with phases:

validate → compile → test → package → verify → install → deploy

Common commands:

./mvnw compile          # Compile only
./mvnw test             # Run tests
./mvnw package          # Create JAR/WAR (does not skip tests)
./mvnw package -DskipTests  # JAR without tests
./mvnw spring-boot:run  # Start the application
./mvnw dependency:tree  # Display dependency tree

Maven Advantages¶

• Widely adopted: Huge ecosystem, nearly all Java libraries have Maven coordinates
• Stable conventions: Every Java developer knows the standard directory structure
• Reproducible: XML is declarative, no imperative code in build scripts
• IDE support: Excellent integration with IntelliJ IDEA, Eclipse, NetBeans
• BOM (Bill of Materials): Centrally managed dependency versions

Maven Disadvantages¶

• Verbose XML: For more complex customisations, the pom.xml quickly becomes unwieldy
• Performance: No incremental builds, no build cache (without plugins like Develocity)
• Extensibility: Custom logic requires Maven plugins, which are costly to develop

Gradle: Programmatic and Flexible¶

Gradle was introduced in 2012 and has significantly surpassed Maven in performance and flexibility. Android projects use Gradle exclusively; in the Spring ecosystem, it is the second choice alongside Maven.

build.gradle (Groovy DSL)¶

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.2.0'
    id 'io.spring.dependency-management' version '1.1.4'
}

group = 'com.example'
version = '1.0.0'

java {
    sourceCompatibility = JavaVersion.VERSION_21
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    runtimeOnly 'org.postgresql:postgresql'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
    useJUnitPlatform()
}

build.gradle.kts (Kotlin DSL — Recommended for New Projects)¶

plugins {
    java
    id("org.springframework.boot") version "3.2.0"
    id("io.spring.dependency-management") version "1.1.4"
}

group = "com.example"
version = "1.0.0"

java {
    sourceCompatibility = JavaVersion.VERSION_21
}

repositories {
    mavenCentral()
}

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
    runtimeOnly("org.postgresql:postgresql")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
}

tasks.test {
    useJUnitPlatform()
}

Gradle Build Commands¶

./gradlew compileJava        # Compile
./gradlew test               # Tests
./gradlew bootJar            # Spring Boot JAR
./gradlew bootRun            # Start the application
./gradlew dependencies       # Dependency tree
./gradlew tasks              # All available tasks

Gradle Advantages¶

• Performance: Incremental builds (only changed files are rebuilt), build cache
• Flexibility: Write custom tasks in Groovy/Kotlin — no plugin development required
• Multi-project builds: Excellent support for monorepos with many subprojects
• Parallelisation: Tasks can be executed in parallel

Gradle Disadvantages¶

• Learning curve: The Groovy/Kotlin DSL is more powerful but initially harder to understand than XML
• Build script complexity: With freedom comes responsibility — Gradle builds can become hard to follow
• Debugging: Problems in build scripts can sometimes be harder to diagnose

Direct Comparison¶

Which Should You Choose?¶

Choose Maven if:

• The team has no experience with Gradle and wants to get started quickly
• Consistency and conventions are more important than flexibility
• The project is a standard Spring Boot application without special build requirements

Choose Gradle if:

• Android development is involved (mandatory)
• Large monorepos or multi-module projects are being built
• Build performance is a concern (large codebase, many tests)
• Custom build logic is needed (custom tasks, code generation, asset processing)

Conclusion¶

For typical Spring Boot projects, Maven is the safe, battle-tested choice. If you need more control over the build process, work in a monorepo, or want to optimise build performance, you should choose Gradle — especially with the Kotlin DSL, which enables type-safe build scripts.