How spring boot reads the configuration file

Spring boot further encapsulates the original configuration of spring, making the program apes a lot easier, really thanks to the spring boot

In everyday code, the read profile properties are often encountered in the business logic of their own writing, and spring boot provides two ways (I know)

1)@Value

@Value ("${profile property name}")

For example

@Value ("${agr-farmer.url}")//The Agr-farmer.url property value is placed in the URL.     Private  String Url;

Configuration file

Agr-farmer.url= 127.0.0.1:8009/app

What if more than one attribute should be done?

Using Annotations @ConfigurationProperties

@Component @configurationproperties (prefix= "Agr-farmer-config")  Public class Agrfarmer {    ///  virtuals Key-value pair    privatenew hashmap<> ();    // Normal value     Private   String key;     // omit Get,set Method }    

The configuration file format is YML

agr-farmer-config:  virtuals:    key1:value1#key:value    key2:value2#key:value  key:t1kmknylx #单值 

How spring boot reads the configuration file