Java springboot yaml syntax notes

Directory yaml syntax annotation configuration file two forms YAML: summary

yaml syntax notes

Configuration file

Two forms

application. properties and.yaml

The first syntax key = value

Type 2 key: Space value

Used to modify the default configuration of spring

YAML:

YAML is a recursive abbreviation for "YAML Ain 't a Markup Language" (YAML is not a markup language). When developing this language, YAML actually means "Yet Another Markup Language" (still a markup language), but to emphasize that this language is data-centered, not markup language-centered, it is renamed with reverse abbreviations.

YAML A Markup Language is a markup language

YAML isnot Markup Language: Not a markup language

YAML

server:
  port:8080

xml

<servlet>
	<port>8080</port>
</servlet>

yaml Syntax

 High requirements for spaces 
# Ordinary ky-value
name:qinjiang
# Object 
student:
  name: qinjiang
  age: 3
#   Inline writing 
students: {name: qinjiang,age: 3}
# Array 
pets:
  - cat
  - dog
  - pig
  pets: [cat,dog,pig]

Official recommendation of properties

# Only key-value pairs can be maintained 
name=qinjiang
student.name = qinjiang
student.age=3

When configuring multiple ports without yaml, you need to create a new properties file

Not required with yaml

server:
  port:8081
spring:
  profiles:
    active: dev
---
server:
  port:8082
spring:
  profiles:dev
---
server:
  port: 8083
spring:
  profiles:test

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