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前面我们构建了jdk运行环境的镜像，这里我们只需要将springboot项目打包到该镜像中，形成一个新的镜像springboot-docker，到时候，利用这个镜像启动容器。再做端口映射，就可以访问我们部署在docker中的springboot项目了。

1、构建springboot项目，编写pom.xml文件。

     
    
     4.0.0
      
    
     com.xxx
      
    
     springboot-docker
      
    
     0.0.1-SNAPSHOT
      
    
     jar
      
    
     springboot-docker
      
    
     http://maven.apache.org
      
        
     
      UTF-8
       
      
         
     
      org.springframework.boot
          
     
      spring-boot-starter-parent
          
     
      2.0.4.RELEASE
       
      
        
           
      
       org.springframework.boot
            
      
       spring-boot-starter-web
          
       
      
         
               
                    
       
        org.springframework.boot
                     
       
        spring-boot-maven-plugin
                 
                
                    
       
        com.spotify
                     
       
        docker-maven-plugin
                     
       
        1.1.1
                     
                        
        
         local/${project.artifactId}
                         
        
         src/main/docker
                         
         
          
          
           /
           
          
           ${project.build.directory}
           
          
           ${project.build.finalName}.jar
           
          
                      
                 
           
       
    
   

项目结构：

2、编写App.java启动类，该启动类还兼顾controller的角色。

package com.xxx.springbootwithdocker;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;@SpringBootApplication@RestControllerpublic class App{    public static void main( String[] args ){    	SpringApplication.run(App.class, args);    }        @GetMapping("/")    public String index(){    	return "{\"id\":\"1001\",\"content\":\"this is a docker\"}";    }    }

 3、准备打包的Dockerfile文件。src/main目录下新建docker文件夹，并新建Dockerfile文件，文件内容如下：

FROM local/centos7-jdk8VOLUME /tmpADD springboot-docker-0.0.1-SNAPSHOT.jar app.jarRUN sh -c 'touch /app.jar'ENV JAVA_OPTS=""ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]

4、编译打包镜像。gitshell命令行切换到springboot-docker项目目录下，运行mvn clean package docker:build

$ mvn clean package docker:build[INFO] Scanning for projects...[INFO][INFO] ------------------------------------------------------------------------[INFO] Building springboot-docker 0.0.1-SNAPSHOT[INFO] ------------------------------------------------------------------------[INFO][INFO] --- maven-clean-plugin:3.0.0:clean (default-clean) @ springboot-docker ---[INFO] Deleting d:\git\GameWorld\Service\springboot-docker\target[INFO][INFO] --- maven-resources-plugin:3.0.2:resources (default-resources) @ springboot-docker ---[INFO] Using 'UTF-8' encoding to copy filtered resources.[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\main\resources[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\main\resources[INFO][INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ springboot-docker ---[INFO] Changes detected - recompiling the module![INFO] Compiling 1 source file to d:\git\GameWorld\Service\springboot-docker\target\classes[INFO][INFO] --- maven-resources-plugin:3.0.2:testResources (default-testResources) @ springboot-docker ---[INFO] Using 'UTF-8' encoding to copy filtered resources.[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\test\resources[INFO][INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) @ springboot-docker ---[INFO] No sources to compile[INFO][INFO] --- maven-surefire-plugin:2.21.0:test (default-test) @ springboot-docker ---[INFO] No tests to run.[INFO][INFO] --- maven-jar-plugin:3.0.2:jar (default-jar) @ springboot-docker ---[INFO] Building jar: d:\git\GameWorld\Service\springboot-docker\target\springboot-docker-0.0.1-SNAPSHOT.jar[INFO][INFO] --- spring-boot-maven-plugin:2.0.4.RELEASE:repackage (default) @ springboot-docker ---[INFO][INFO] --- docker-maven-plugin:1.1.1:build (default-cli) @ springboot-docker ---[INFO] Using authentication suppliers: [ConfigFileRegistryAuthSupplier][INFO] Copying d:\git\GameWorld\Service\springboot-docker\target\springboot-docker-0.0.1-SNAPSHOT.jar -> d:\git\GameWorld\Service\springboot-docker\target\docker\springboot-docker-0.0.1-SNAPSHOT.jar[INFO] Copying src\main\docker\Dockerfile -> d:\git\GameWorld\Service\springboot-docker\target\docker\Dockerfile[INFO] Building image local/springboot-dockerStep 0 : FROM local/centos7-jdk8 ---> 526ac3c7d9bcStep 1 : VOLUME /tmp ---> Running in 3e280a0ada9a ---> a5413101d40cRemoving intermediate container 3e280a0ada9aStep 2 : ADD springboot-docker-0.0.1-SNAPSHOT.jar app.jar ---> fd445c67de28Removing intermediate container 6c88bd797017Step 3 : RUN sh -c 'touch /app.jar' ---> Running in 3848c1b364fe ---> 4a5ce0df766fRemoving intermediate container 3848c1b364feStep 4 : ENV JAVA_OPTS "" ---> Running in 7593b0bf0660 ---> e91748a27f6cRemoving intermediate container 7593b0bf0660Step 5 : ENTRYPOINT sh -c java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar ---> Running in 7f3b41d42b33 ---> f6ee77cee236Removing intermediate container 7f3b41d42b33Successfully built f6ee77cee236[INFO] Built local/springboot-docker[INFO] ------------------------------------------------------------------------[INFO] BUILD SUCCESS[INFO] ------------------------------------------------------------------------[INFO] Total time: 30.636 s[INFO] Finished at: 2018-09-26T10:58:38+08:00[INFO] Final Memory: 51M/458M[INFO] ------------------------------------------------------------------------

构建成功，我们可以查看镜像，启动容器。

启动成功，需要做一个端口映射，我们就可以通过windows本机上的浏览器访问springboot项目。

访问 http://localhost:18080/

至此，springboot与docker集成，已经全部完成，整个过程基本都是在配置docker镜像，构建docker镜像。