Spring Boot Basics: Configuration file configuration variables

First, the configuration

Resources under Application.properties

1. General Configuration

Resources under Application.properties, such as write: server.port=9090, then the boot port is 9090

2. Custom Configuration

3. Reference to configuration variables

4, Random value configuration: If the parameters are random, you can be in the configuration file with

5, Random port configuration: To avoid port conflict problems

  #server. Port=9090  server.port  =${random. int  [1024 , 9999 ]}//  random port  gwf.num=${random. int }//  random number  Gwf.hello=hello//  Gwf.name = GWF ${gwf.hello} ${gwf.num}//  reference to configuration variable   

@RestController  Public class Hellocontroller {    @Value ("${gwf.name}")    private  String msg;    @RequestMapping ("/hello")    public  String Hello () {        returnthis. msg;    }}

Use is referred to by the annotation @Value ("${}"), which is somewhat analogous to the way in which a JSP variable is evaluated

Second, yml configuration file

Yaml is a language for writing configuration files, it is a natural tree structure

Third, log configuration file

Logback.xml, can Baidu query

Four, multi-environment configuration

Application-{profile}.properties,profile represents an environment variable

After packaging, go to the jar store directory and execute the command:

Java-jar ***.jar--spring.profilr.active=dev/test, performing the development environment and test environment respectively

Spring Boot Basics: Configuration file configuration variables