搭建SpringBoot项目

搭建一个简单的SpringBoot项目：

创建maven工程，pom为： ```xml <?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">
```
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.6
org.study test-docker pom 1.0-SNAPSHOT
docker_boot 8 8


2.  新建Module，pom为： 
```xml
<?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">
    <parent>
        <artifactId>test-docker</artifactId>
        <groupId>org.study</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>docker_boot</artifactId>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>
        </plugins>
    </build>
</project>

编写一个配置文件
```
server:
port: 6001
```

编写主启动类 ```java package com.study;

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

/**

@author tengyer 2022/05/06 16:34 */ @SpringBootApplication public class DockerBootApplication { public static void main(String[] args) {
```
 SpringApplication.run(DockerBootApplication.class, args);
```
} } ```

编写一个Controller ```java package com.study.controller;

import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

/**

@author tengyer 2022/05/06 16:35 */ @RestController public class OrderController { @Value(“${server.port}”) private String port;

@RequestMapping(“/order/docker”) public String helloDocker() {
```
 return "hello world \t" + port + "\t" + UUID.randomUUID().toString();
```
}

@RequestMapping(value = “/order/index”, method = RequestMethod.GET) public String index() {
```
 return "服务端口号：" + "\t" + port + "\t" + UUID.randomUUID().toString();
```
} } ```

在Idea中运行没有问题时，将其使用maven的package打成jar包。

发布微服务项目到Docker容器

将项目jar包上传到服务器
编写Dockerfile ```dockerfile FROM openjdk:8-oracle MAINTAINER lee

在主机 /var/lib/docker目录下创建一个临时文件，并链接到容器的 /tmp

VOLUME /tmp

将jar包添加到容器中，并命名为 springboot_docker.jar

ADD docker_boot-1.0-SNAPSHOT.jar /springboot_docker.jar

运行jar包

RUN bash -c ‘touch /springboot_docker.jar’ ENTRYPOINT [“java”, “-jar”, “/springboot_docker.jar”]

SpringBoot项目配置的端口号为6001，需要将6001暴露出去

EXPOSE 6001


3.  构建镜像 
```shell
docker build -t springboot_docker:1.0 .

启动容器

docker run -d -p 6001:6001 --name springboot springboot_docker:1.0

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