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This article mainly introduces "the method introduction of springboot configuration file". In the daily operation, I believe that many people have doubts about the method introduction of springboot configuration file. The editor has consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "method introduction of springboot configuration file". Next, please follow the editor to study!

1. What is YML

SpringBoot uses a global configuration file with a fixed profile name

Application.propertiesapplication.yml

The role of the configuration file: modify the default values for SpringBoot automatic configuration

YAML (YAML Ain't Markup Language)

YAML A Markup Language: is a markup language

YAML isn't Markup Language: not a markup language

Markup language:

Previous configuration files; most use xxx.xml files

YAML: data-centric, more suitable for configuration files than json, xml, etc.

YAML: configuration example server:

Port: 5658

XML: configuration example

5658

2. YML syntax

K: (space) v: represents a pair of key-value pairs (spaces must have)

Control the hierarchical relationship with the indentation of spaces; as long as a column of data that is left-aligned is at the same level

Server:

Port: 5658

Path: / hello

Properties and values are also case-sensitive

Literal quantity

Normal values (numbers, strings, Boolean)

K: v literally write directly

Strings do not need single or double quotation marks by default; "": double quotes; special characters are not escaped; special characters are used as their intended meaning name: "zhangsan\ n lisi": output; zhangsan line feed lisi'': single quotation marks; escape special characters, which are ultimately just a normal string data name: 'zhangsan\ n lisi': output; zhangsan\ n lisi

Summary:

For the value of the string, the effect of writing directly is the same as adding single quotation marks. If you want to use the function of special characters, you need to add double quotes, for example:\ nIf it is in double quotes, it will be used as a newline.

Object, Map

(attributes and values) (key-value pairs):

K: v: write the relationship between the properties and values of the object on the next line; note the indentation

The object is still the way of k: v

Friends:

LastName: zhangsan

Age: 20

Inline writing:

Friends: {lastName: zhangsan, age: 18}

Array

(List, Set):

Use a-value to represent an element in an array

Pets:

-cat

-dog

-pig

Inline writing

Pets: [cat, dog, pig]

At this point, the study of "introduction to the method of springboot configuration file" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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