springboot的打包方式有很多种。有打成war的，有打成jar的，也有直接提交到github，通过jekins进行打包部署的。这里主要介绍如何打成jar进行部署。不推荐用war，因为springboot适合前后端分离，打成jar进行部署更合适。

首先需要在application.properties当中配置端口

server.port=8080

# http://localhost:8088/swagger-ui.html

marven的配置文件

<?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>com.weixin</groupId>

    <artifactId>smallsystem</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>smallsystem</name>

    <description>smallsystem</description>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0.0.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>

    <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>io.springfox</groupId>

            <artifactId>springfox-swagger2</artifactId>

            <version>2.2.2</version>

        </dependency>

        <dependency>

            <groupId>io.springfox</groupId>

            <artifactId>springfox-swagger-ui</artifactId>

            <version>2.2.2</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-devtools</artifactId>

            <optional>true</optional>

        </dependency>

    </dependencies>

    <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.weixin.SmallsystemApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>

</project>

注意最下面的build这块一定要配置否则打jar的时候会说找不 到主类

在启动类当中加上extends SpringBootServletInitializer并重写configure方法，这是为了打包springboot项目用的。

package com.weixin;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

@SpringBootApplication

public class SmallsystemApplication extends SpringBootServletInitializer{

    public static void main(String[] args) {

        SpringApplication.run(SmallsystemApplication.class, args);

    }

    @Override//为了打包springboot项目

    protected SpringApplicationBuilder configure(

            SpringApplicationBuilder builder) {

        return builder.sources(this.getClass());

    }

}

然后按照顺序运行mvn clean再mvn install,我是用idea执行的

然后就会出来我们需要的jar

然后到这个jar的根目录下执行java -jar smallsystem-0.0.1-SNAPSHOT.jar
这个执行方式windows和linux上都一样

如果是阿里云上的，需要通过阿里云把你指定的端口开放，如果是虚拟机上的，需要把防火墙什么的关掉，开放端口即可。