小编Jap*_*het的帖子

我刚刚安装了 Angular 8。当我尝试使用“ng serve --open”运行一个项目时，它给了我以下错误：

Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Error: Could not  find the implementation for builder @angular-devkit/build-angular:dev-server
    at WorkspaceNodeModulesArchitectHost.resolveBuilder (C:\Users\manus\project\space-estate\webshop\frontend\client\node_modules\@angular\cli\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:49:19)
    at ServeCommand.initialize (C:\Users\manus\project\space-estate\webshop\frontend\client\node_modules\@angular\cli\models\architect-command.js:72:63)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:744:11)
    at startup (internal/bootstrap/node.js:285:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)

当我检查版本时，它给了我以下信息：

Angular CLI: 8.0.1
Node: 10.13.0
OS: win32 x64
Angular: 8.0.0
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              8.0.1
@angular-devkit/schematics        8.0.1 (cli-only) …

我是 Docker 的新手，我需要在 docker 工具箱上使用 docker-compose 启动我的 Angular/SpringBoot/MySQL 项目。我将一个 docker yml 文件复制到我的项目中，该文件使用相同的技术并更改了其中的路径以匹配我的项目。但是，当我尝试 docker-compose 时，它​​会引发以下错误：

com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
[...] 84 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)

docker-compose.yml 看起来像：

version: '3'

services:
  database:
    image: mysql
    container_name: database
    environment:
      MYSQL_ROOT_PASSWORD: ****
      MYSQL_DATABASE: db_example
      MYSQL_USER: springuser
      MYSQL_PASSWORD: ****
    ports:
      - 3306:3306
    volumes:
      - db_exampleData:/var/lib/mysql

  springapi:
    image: openjdk:10-jre-slim
    container_name: springapi
    ports:
      - 8443:8443
    depends_on:
      - database
    volumes:
      - ./backend/target/backend-0.1.0.jar:/application.jar
    command: ["java", "-jar", "application.jar"]

  angular:
    image: nginx:alpine
    container_name: angular
    ports:
      - …