heroku 部署 Spring Boot 项目

2019-12-27 更新：2019-12-27

首先创建一个空的 Spring Boot 项目，修改启动类SpringBootHerokuApplication如下

package io.arukas;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
public class SpringBootHerokuApplication {

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

    @GetMapping("")
    public String welcome() {
        return "hello heroku";
    }

}

接下来就可以通过git将代码推送到 Heroku 部署了，前提需要安装 Heroku 客户端，可参考官方文档安装https://devcenter.heroku.com/articles/heroku-cli

$ heroku login
heroku: Press any key to open up the browser to login or q to exit:
Opening browser to https://cli-auth.heroku.com/auth/browser/c037d3e6-1359-446c-b26a-8589d07de256
heroku: Waiting for login... |

Heroku 客户会打开默认的浏览器，提示登录确认，确认后如下

$ heroku login
heroku: Press any key to open up the browser to login or q to exit:
Opening browser to https://cli-auth.heroku.com/auth/browser/c037d3e6-1359-446c-b26a-8589d07de256
Logging in... done
Logged in as xxx@gmail.com

初始化仓库提交到本地

$ git init
Initialized empty Git repository in E:/2019/0000/spring-boot-heroku/.git/

$ git add
........

$ git commit -am "hello heroku"
[master (root-commit) 1885978] hello heroku
 10 files changed, 353 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 build.gradle
 create mode 100644 gradle/wrapper/gradle-wrapper.jar
 create mode 100644 gradle/wrapper/gradle-wrapper.properties
 create mode 100644 gradlew
 create mode 100644 gradlew.bat
 create mode 100644 settings.gradle
 create mode 100644 src/main/java/io/arukas/SpringBootHerokuApplication.java
 create mode 100644 src/main/resources/application.properties
 create mode 100644 src/test/java/io/arukas/SpringBootHerokuApplicationTests.java

创建应用

$ heroku create spring-boot-heroku
Creating ⬢ spring-boot-heroku... !
 !    Name spring-boot-heroku is already taken

## 如上提示名称已存在，换个名称再试
$ heroku create spring-boot-heroku-gradle
Creating ⬢ spring-boot-heroku-gradle... done
https://spring-boot-heroku-gradle.herokuapp.com/ | https://git.heroku.com/spring-boot-heroku-gradle.git

推送到远程仓库

创建应用时，heroku 已经为我们添加了远程地址 https://git.heroku.com/spring-boot-heroku-gradle.git ，下面开始推送代码构建项目

$ git push heroku master
Enumerating objects: 24, done.
Counting objects: 100% (24/24), done.
Delta compression using up to 8 threads
Compressing objects: 100% (16/16), done.
Writing objects: 100% (24/24), 54.37 KiB | 6.04 MiB/s, done.
Total 24 (delta 0), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Gradle app detected
remote: -----> Spring Boot detected
remote: -----> Installing JDK 1.8... done
remote: -----> Building Gradle app...
remote: -----> executing ./gradlew build -x test
remote:        Downloading https://services.gradle.org/distributions/gradle-6.0.1-bin.zip
remote:        ..........................................................................................
remote:        > Task :compileJava
remote:        > Task :processResources
remote:        > Task :classes
remote:        > Task :bootJar
remote:        > Task :jar SKIPPED
remote:        > Task :assemble
remote:        > Task :check
remote:        > Task :build
remote:
remote:        BUILD SUCCESSFUL in 35s
remote:        3 actionable tasks: 3 executed
remote: -----> Discovering process types
remote:        Procfile declares types     -> (none)
remote:        Default types for buildpack -> web
remote:
remote: -----> Compressing...
remote:        Done: 65.7M
remote: -----> Launching...
remote:        Released v3
remote:        https://spring-boot-heroku-gradle.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/spring-boot-heroku-gradle.git
 * [new branch]      master -> master

出现上面的信息，我们的应用就部署成功了，下面可以打开浏览器试试了，访问地址：https://spring-boot-heroku-gradle.herokuapp.com

项目源码: https://github.com/heroku-sample/spring-boot-heroku-gradle

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