.yml是什么文件(编写规则)

name1: zhangsan
name2: 'zhangsan \n lisi'
name3: "zhangsan \n lisi"
age: 18
flag: true
# 日期
date: 2019/01/01
# 对象属性关系
people:
  name: zhangsan
  age: 20
# 行内写法
people: {name:zhangsan,age: 20} 
# 数组写法
pets:
   - dog
   - pig
   - cat
# 数组行内写法
pets: [dog,pig,cat]

# conf.yml
animal: pets
hash: { name: Steve, foo: bar }

{
    { "animal": "pets" },
    { "hash": { "name": "Steve", "foo": "bar" } }
}

# conf.yml
Animal:
 - Cat
 - Dog
 - Goldfish
# 正常情况下字符串不用写引号
str: 这是一行字符串
# 字符串内有空格或者特殊字符时需要加引号
str: '内容： 字符串'
parent: ~ # null

{ "Animal": [ "Cat", "Dog", "Goldfish"],
  "str": "内容： 字符串",
  "parent": null
 }

public class Person {
  private String lastName;
  private Integer age;
  private Boolean boss;
  private Date birth;
  private Map<String,Object> maps;
  private List<Dog> lists;
  private Dog dog;
  private String[] arr;
}
public class Dog {
  private String name;
  private Integer age;
}
对应的yml
person:
  boss: false
  maps:
    k1: v1
    k2: 14
  lists:
    - name: d1
      age: 2
    - name: d2
      age: 3
    - {name: d3,age: 4}
  birth: 2017/12/15
  dog:
    name: p_dog
    age: 15
  age: 13
  last-name: 张三
  arr: [s1,s2,s3]

server:
  port: 8081
spring:
  profiles:
    active: prod #激活对应的文档块
---
server:
  port: 8083
spring:
  profiles: dev #指定属于哪个环境
---
server:
  port: 8084
spring:
  profiles: prod  #指定属于哪个环境