Idea是Java开发利器，springboot是Java生态中最流行的微服务框架，docker是时下最火的容器技术，那么它们结合在一起会产生什么化学反应呢？

一、开发前准备

1. Docker的安装可以参考https://docs.docker.com/install/

2. 配置docker远程连接端口

  vi /usr/lib/systemd/system/docker.service

找到 ExecStart，在最后面添加 -H tcp://0.0.0.0:2375，如下图所示

3. 重启docker

 systemctl daemon-reload systemctl start docker

4. 开放端口

firewall-cmd --zone=public --add-port=2375/tcp --permanent

5. Idea安装插件,重启

6. 连接远程docker

(1) 编辑配置

(2) 填远程docker地址

(3) 连接成功，会列出远程docker容器和镜像

二、新建项目

1. 创建springboot项目

项目结构图

(1) 配置pom文件

<?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>docker-demo</groupId>    <artifactId>com.demo</artifactId>    <version>1.0-SNAPSHOT</version>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.0.2.RELEASE</version>        <relativePath />    </parent>
    <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>         <docker.image.prefix>com.demo</docker.image.prefix>         <java.version>1.8</java.version>    </properties>    <build>        <plugins>          <plugin>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-maven-plugin</artifactId>          </plugin>        <plugin>           <groupId>com.spotify</groupId>           <artifactId>docker-maven-plugin</artifactId>           <version>1.0.0</version>           <configuration>              <dockerDirectory>src/main/docker</dockerDirectory>              <resources>                <resource>                    <targetPath>/</targetPath>                    <directory>${project.build.directory}</directory>                    <include>${project.build.finalName}.jar</include>                </resource>              </resources>           </configuration>        </plugin>        <plugin>            <artifactId>maven-antrun-plugin</artifactId>            <executions>                 <execution>                     <phase>package</phase>                    <configuration>                        <tasks>                            <copy todir="src/main/docker" file="target/${project.artifactId}-${project.version}.${project.packaging}"></copy>                        </tasks>                     </configuration>                    <goals>                        <goal>run</goal>                    </goals>                    </execution>            </executions>        </plugin>
       </plugins>    </build><dependencies>    <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>    <dependency>        <groupId>log4j</groupId>        <artifactId>log4j</artifactId>        <version>1.2.17</version>    </dependency></dependencies></project>

(2) 在src/main目录下创建docker目录，并创建Dockerfile文件

FROM openjdk:8-jdk-alpineADD *.jar app.jarENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

(3) 在resource目录下创建application.properties文件

logging.config=classpath:logback.xmllogging.path=/home/developer/app/logs/server.port=8990

(4) 创建DockerApplication文件

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

(5) 创建DockerController文件

@RestControllerpublic class DockerController {    static Log log = LogFactory.getLog(DockerController.class);
    @RequestMapping("/")    public String index() {        log.info("Hello Docker!");        return "Hello Docker!";    }}