小编Fed*_*rez的帖子

我正在处理Java 8流,我想知道我是否能以一种奇特的方式解决这个问题.

这就是我的场景:假设我有一个派对列表,在每个元素中我都有成员的名字.我想迭代列表并创建一个新的名称和他们属于哪一方.

我的第一个方法是:

@Test
public void test(){

    Party firstParties = new Party("firstParty",Lists.newArrayList("Member 1","Member 2","Member 3"));
    Party secondParty = new Party("secondParty",Lists.newArrayList("Member 4","Member 5","Member 6"));

    List<Party> listOfParties = Lists.newArrayList();
    listOfParties.add(firstParty);
    listOfParties.add(secondParty);

    List<Elector> electors = new ArrayList<>();
    listOfParties.stream().forEach(party ->
        party.getMembers().forEach(memberName ->
            electors.add(new Elector(memberName,party.name))
        )
    );

}

class Party {
    List<String> members = Lists.newArrayList();
    String name = "";

    public Party(String name, List<String> members) {
        this.members = members;
        this.name = name;
    }

    public List<String> getMembers() {
        return members;
    }
}

class Elector{

    public Elector(String …

我正在使用docker compose来运行我的应用程序.为此,我需要在容器内设置主机(这取决于我正在运行的环境).

我的方法是:

创建环境文件并设置变量:

#application.env
SERVER_IP=10.10.9.134

我的docker撰写文件看起来像:

version: '2'
services:

  api:
    container_name: myApplication
    env_file:
      - application.env
    build: ./myApplication/
    entrypoint: ./docker/api-startup.sh
    ports:
      - "8080:8080"
    depends_on:
      - redis    
    extra_hosts: &extra_hosts
      myip: $SERVER_IP

但我的问题是变量SERVER_IP永远不会被替换.

当我运行docker-compose配置时,我看到:

services:
  api:
    build:
      context: /...../myApplication
    container_name: myApplication
    depends_on:
    - redis
    entrypoint: ./docker/api-startup.sh
    environment:
      SERVER_IP: 10.10.9.134
    extra_hosts:
      myip: ''
    ports:
    - 8080:8080

我试图使用$ SERVER_IP或$ {SERVER_IP}替换变量引用,但它不起作用.