springboot 使用GraalVM打包

优势

使用Java虚拟机所需资源的一小部分，因此运行成本更低
启动时间大幅度下降，以毫秒为单位,可以大大减小内存的使用。
不需要进行预热即可提供最佳性能
可以打包到轻量级容器映像中以便快速有效地部署
减少了攻击面（这个和网络安全相关）

确定使用的jdk版本

jdk21

下载 GraalVM [二选一]

直接下载
oracle
或者使用sdk 下载

# 安装sdk
https://sdkman.io/install

# 安装
sdk install java 21.0.3-graal
sdk use java 21.0.3-graal

创建项目 https://start.spring.io/

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>21</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.graalvm.buildtools</groupId>
                <artifactId>native-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>


@RestController
@SpringBootApplication
public class DemoApplication {

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }

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

}

打包编译

mvn -Pnative native:compile

运行

# 启动1 -> Started DemoApplication in 0.048 seconds (process running for 0.068)java
./target/demo

# 启动2 -> Started DemoApplication in 0.818 seconds (process running for 1.143)
java -jar ./target/demo-0.0.1-SNAPSHOT.jar

浏览器打开 http://127.0.0.1:8080