简介
在文章《GraalVM和Spring Native尝鲜，一步步让Springboot启动飞起来，66ms实现启动》中，咱们介绍了如何应用Spring Native和buildtools插件，打包出本地镜像，也打包成Docker镜像。本文摸索一下，如果不通过这个插件来生成镜像。这样咱们能够管制更多、理解更多。
创立Spring Boot我的项目
创立Spring Boot我的项目，引入Spring Native，咱们次要应用的是Spring Native提供的AOT性能。如下：
<dependencies> <dependency> <groupId>org.springframework.experimental</groupId> <artifactId>spring-native</artifactId> <version>${spring-native.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency></dependencies><build> <plugins> <plugin> <groupId>org.springframework.experimental</groupId> <artifactId>spring-aot-maven-plugin</artifactId> <version>${spring-native.version}</version> <executions> <execution> <id>test-generate</id> <goals> <goal>test-generate</goal> </goals> </execution> <execution> <id>generate</id> <goals> <goal>generate</goal> </goals> </execution> </executions> </plugin> </plugins></build>Build image的时候，咱们须要援用依赖库，所以加上上面的插件：
<plugin> <artifactId>maven-dependency-plugin</artifactId> <executions> <execution> <phase>package</phase> <goals> <goal>copy-dependencies</goal> </goals> <configuration> <outputDirectory>${project.build.directory}/lib</outputDirectory> </configuration> </execution> </executions></plugin>接着先编译出Java class，命令如下：
$ mvn clean package打包本地镜像
后面的命令打包完，在target目录下会有一个lib目录，咱们须要用上。通过native-image命令来生成镜像，如下：
$ native-image -cp ./target/classes/:target/lib/* com.pkslow.springboot.SpringbootGraalVMNativeMain Pkslow.SpringbootGraalVMNativeMain这样就会生成一个可执行文件：Pkslow.SpringbootGraalVMNativeMain
执行如下：
$ ./Pkslow.SpringbootGraalVMNativeMain应用了93ms来启动，还是很快的。
拜访服务是失常的：
$ curl -i http://localhost:8080/hi-graalvmHTTP/1.1 200 Content-Type: text/plain;charset=UTF-8Content-Length: 67Date: Wed, 02 Nov 2022 15:08:44 GMTThis message is from Spring Boot built/run by GraalVM/Spring Native创立Docker镜像
先拉取根底镜像：
$ docker pull springci/graalvm-ce:java11-0.12.x进入容器看一下外面的情况：
$ docker run -it --rm --entrypoint bash springci/graalvm-ce:java11-0.12.xroot@d9b54bdce70a:/# pwd/root@d9b54bdce70a:/# java --versionopenjdk 11.0.15 2022-04-19OpenJDK Runtime Environment GraalVM 22.1.1.0-dev (build 11.0.15+10-jvmci-22.1-b06)OpenJDK 64-Bit Server VM GraalVM 22.1.1.0-dev (build 11.0.15+10-jvmci-22.1-b06, mixed mode, sharing)root@d9b54bdce70a:/# which java/opt/java/bin/javaroot@d9b54bdce70a:/# which native-image/opt/java/bin/native-image筹备一下Dockerfile如下：
FROM springci/graalvm-ce:java11-0.12.xVOLUME /tmpARG PORT=8080ARG TIME_ZONE=Asia/ShanghaiENV TZ=${TIME_ZONE}EXPOSE ${PORT}RUN pwdRUN mkdir /pkslow-applicationWORKDIR /pkslow-application/RUN cd /pkslow-applicationCOPY target/classes/ /pkslow-application/classes/COPY target/lib/ /pkslow-application/lib/RUN native-image -cp /pkslow-application/classes/:/pkslow-application/lib/* \ com.pkslow.springboot.SpringbootGraalVMNativeMain \ Pkslow.SpringbootGraalVMNativeMainENTRYPOINT ["/pkslow-application/Pkslow.SpringbootGraalVMNativeMain"]打包Docker镜像：
$ docker build . -t pkslow/spring-boot-native-without-buildtools:1.0-SNAPSHOT -f src/main/dker/Dockerfile实现后通过上面命令启动，57ms实现启动：
$ docker run -it -p 8080:8080 --rm pkslow/spring-boot-native-without-buildtools:0-SNAPSHOT2022-11-02 23:48:40.918 INFO 1 --- [ main] o.s.nativex.NativeListener : AOT mode enabled . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.6.2)2022-11-02 23:48:40.920 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : Starting SpringbootGraalVMNativeMain using Java 11.0.15 on 12528bd45fd7 with PID 1 (/pkslow-application/Pkslow.SpringbootGraalVMNativeMain started by root in /pkslow-application)2022-11-02 23:48:40.920 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : No active profile set, falling back to default profiles: default2022-11-02 23:48:40.934 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)2022-11-02 23:48:40.935 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]2022-11-02 23:48:40.935 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.56]2022-11-02 23:48:40.940 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext2022-11-02 23:48:40.940 INFO 1 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 19 ms2022-11-02 23:48:40.963 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''2022-11-02 23:48:40.964 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : Started SpringbootGraalVMNativeMain in 0.057 seconds (JVM running for 0.061)2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 0 ms测试失常启动：
$ curl -i http://127.0.0.1:8080/hi-graalvmHTTP/1.1 200 Content-Type: text/plain;charset=UTF-8Content-Length: 67Date: Wed, 02 Nov 2022 15:49:05 GMTThis message is from Spring Boot built/run by GraalVM/Spring Native为了集成打包镜像到CI/CD中，在pom增加以下插件：
<plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>3.0.0</version> <executions> <execution> <phase>install</phase> <goals> <goal>exec</goal> </goals> <configuration> <skip>${docker.skip}</skip> <executable>docker</executable> <arguments> <argument>build</argument> <argument>.</argument> <argument>-t</argument> <argument>pkslow/${project.artifactId}:${project.version}</argument> <argument>-f</argument> <argument>src/main/docker/Dockerfile</argument> </arguments> </configuration> </execution> </executions></plugin>通过以下命令即可生成Docker镜像：
$ mvn clean install -Ddocker.skip=false代码
代码请看GitHub: https://github.com/LarryDpk/p...