spring-boot configuration items essays 2--

Configuring written in src / resources / application.properties in:

Modify the port number:

server.port=8081

Modify context-path:

server.servlet.context-path = /demo

Again, when access to the project directly localhost: 8081 will not find the item must be added localhsot: 8081 / Demo can access

Profiles by yml file:

New application.yml in the resources directory

server:
    port: 8081
    servlet
      context-path: /demo

Yml a space between the keys and values, and an upper indented two spaces

yml custom configuration:

Custom price, num, word configuration

server:
    port: 8081
    servlet
      context-path: /demo

price: 1
num: 2
workd: 单价${"price"},数量${"num"}

Cited in the controller:

package com.example.demo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;

@RestController
public class HelloController {
    @Value("${word}")
    private String word;
    @GetMapping("/hello")
    public String hello(){
        return "word:"+word;
    }
}

To distinguish between production and development environments:

Copy application.yml

get:

application.yml for selecting a production or development environment

Configuring application-dev.yml development environment

Configuring application-pron.yml production environment

application-dev application-pron application is copy now modify the application configuration:

Empty original configuration:

spring:
  profiles:
    active: pron

We should not change the code using different configurations:

mvn clean package
#进入target
java -jar -Dspring.profiles.active=pron  包名