Docker部署SpringBoot项目

参考：https://www.bilibili.com/video/BV1og4y1q7M4?p=1

一.在IDEA中构建项目

1. 在IDEA中创建新的Maven项目
2. 修改pom.xml文件，增加springboot的相关依赖

<?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.yqj</groupId>
    <artifactId>springboot-docker</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3. 编写主启动类

package com.yqj.docker;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

4. 编写controller层的访问测试类

package com.yqj.docker.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/hello")
    public String hello(){
        return "Hello Docker";
    }
}

5. 启动本地的springboot服务，测试是否可以正常访问 http://localhost:8080/hello
6. 若可以正常访问，则通过maven将项目打为jar包
7. 编写Dockerfile文件

FROM java:8

MAINTAINER yaj<yaoqijun@outlook.com>

COPY *.jar /app.jar

EXPOSE 8080

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

二.Docker构建镜像并运行容器

1. 将生成的jar包与Dockerfile文件复制到linux服务器的某个目录中
2. 使用Dockerfile构建镜像

docker build -t springboot-demo:1.0 .

3. 启动容器

docker run -d -p 8080:8080 --name myspringboot springboot-demo:1.0

4. 测试访问

curl http://localhost:8080/hello
Hello Docker