SpringBoot项目瘦身的实战指南

# Maven项目
mvn dependency:tree > dependencies.txt

# Gradle项目
gradle dependencies > dependencies.txt

<!-- 示例：排除Tomcat使用Jetty -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jetty</artifactId>
</dependency>

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot.experimental</groupId>
            <artifactId>spring-boot-thin-layout</artifactId>
            <version>1.0.28.RELEASE</version>
        </dependency>
    </dependencies>
</plugin>

<resources>
    <resource>
        <directory>src/main/resources</directory>
        <excludes>
            <exclude>**/*.ftl</exclude>
            <exclude>test-data/*</exclude>
        </excludes>
    </resource>
</resources>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <excludeDevtools>true</excludeDevtools>
                <excludeGroupIds>org.unnecessary</excludeGroupIds>
                <layers>
                    <enabled>true</enabled>
                </layers>
            </configuration>
        </plugin>
    </plugins>
</build>

bootJar {
    layered {
        enabled = true
    }
    exclude "**/development/*"
}

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        new SpringApplicationBuilder(Application.class)
           .lazyInitialization(true)
           .run(args);
    }
}

@EnableAutoConfiguration(exclude = {
    DataSourceAutoConfiguration.class,
    CacheAutoConfiguration.class
})

FROM adoptopenjdk:11-jre-hotspot as builder
# 构建阶段...

FROM adoptopenjdk:11-jre-hotspot
COPY --from=builder /app/dependencies/ ./
COPY --from=builder /app/snapshot-dependencies/ ./
COPY --from=builder /app/application/ ./

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-enforcer-plugin</artifactId>
    <executions>
        <execution>
            <id>enforce-size</id>
            <goals><goal>enforce</goal></goals>
            <configuration>
                <rules>
                    <requireFilesSize>
                        <maxSize>100000000</maxSize> <!-- 100MB -->
                        <files>
                            <file>target/*.jar</file>
                        </files>
                    </requireFilesSize>
                </rules>
            </configuration>
        </execution>
    </executions>
</plugin>