1、构架springboot项目
2、打包应用
3、编写dockerfile

FROM java:8

COPY *.jar /app.jar

CMD ["--server.port=8080"]

EXPOSE 8080

ENTRYPOINT ["java","-jar","/app.jar"]

4、构建镜像

[root@iZwz9gcg5lpw0sp5r86b4dZ idea]# ls
Dockerfile  springbootdemo-0.0.1-SNAPSHOT.jar
[root@iZwz9gcg5lpw0sp5r86b4dZ idea]# docker build -t young666 .
Sending build context to Docker daemon  47.06MB
Step 1/5 : FROM java:8
8: Pulling from library/java
5040bd298390: Pull complete 
fce5728aad85: Pull complete 
76610ec20bf5: Pull complete 
60170fec2151: Pull complete 
e98f73de8f0d: Pull complete 
11f7af24ed9c: Pull complete 
49e2d6393f32: Pull complete 
bb9cdec9c7f3: Pull complete 
Digest: sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8c0e9d
Status: Downloaded newer image for java:8
 ---> d23bdf5b1b1b
Step 2/5 : COPY *.jar /app.jar
 ---> 529e37879e3c
Step 3/5 : CMD ["--server.port=8080"]
 ---> Running in 8c2e482da3ba
Removing intermediate container 8c2e482da3ba
 ---> f45efff2bedc
Step 4/5 : EXPOSE 8080
 ---> Running in 985c426ce7ec
Removing intermediate container 985c426ce7ec
 ---> d167cd7a15ec
Step 5/5 : ENTRYPOINT ["java","-jar","/app.jar"]
 ---> Running in 657959521ec7
Removing intermediate container 657959521ec7
 ---> 116a5a54ddbd
Successfully built 116a5a54ddbd
Successfully tagged young666:latest
[root@iZwz9gcg5lpw0sp5r86b4dZ idea]# ll
total 45960
-rw-r--r-- 1 root root      120 Jun 17 16:28 Dockerfile
-rw-r--r-- 1 root root 47056728 Jun 17 16:29 springbootdemo-0.0.1-SNAPSHOT.jar

5、发布运行