一、创建springboot项目

1.1 controller中加入方法

@RestController
public class HelloController {
  @GetMapping("/docker")
  public String hello() {
    return "Hello Docker!!";
  }
}

1.2 pom中加入docker-maven-plugin

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.payne.study</groupId>
	<artifactId>spring-boot-study</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>spring-boot-study</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.6.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<!--properties节点中设置docker镜像的前缀“springboot”-->
		<docker.image.prefix>springboot</docker.image.prefix>
	</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.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>

			<!--加入maven插件“docker-maven-plugin”-->
			<plugin>
				<groupId>com.spotify</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<!--<version>0.2.3</version>-->
				<version>0.4.11</version>
				<configuration>
					<imageName>${docker.image.prefix}/${project.artifactId}</imageName>
					<dockerDirectory>src/main/docker</dockerDirectory>
					<resources>
						<resource>
							<targetPath>/</targetPath>
							<directory>${project.build.directory}</directory>
							<include>${project.build.finalName}.jar</include>
						</resource>
					</resources>
				</configuration>
			</plugin>
		</plugins>
		<finalName>spring-boot-study</finalName>
	</build>
</project>

1.3 编写Dockerfile

放置到src/docker目录下

FROM java:8
VOLUME /tmp
ADD spring-boot-study.jar app.jar
RUN sh -c 'touch /app.jar'
ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]

二、部署项目到docker

2.1 准备文件

把spring-boot-study.jar和dockerfile复制到某一个文件夹中；

2.2 执行docker builder命令

docker build -t spring-boot-docker .

-t代表要构建的镜像的名字和标签，通常 name:tag 或者 name 格式，Tag默认是latest
.代表当前目录，也就是Dockerfile所在的目录。

docker builder命令详解： http://www.runoob.com/docker/docker-build-command.html

第一次执行会下载相关镜

运行完成之后查看images，可以看到spring-boot-docker 镜像已经build成功

2.3 执行docker run命令

docker run -d -p 8080:8080 spring-boot-docker

Docker Run命令大全：http://www.runoob.com/docker/docker-run-command.html

三、见证结果

访问地址：http://localhost:8080/docker

部署成功