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一个项目的的环境一般有三个：开发(dev)、测试(test)、生产(proc)，一般对应三套环境，三套配置文件。
像下面这样直接写两个配置文件是不行的。

application.ymlserver:port: 8080

application-dev.ymlspring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTCusername: rootpassword: root

SpringBoot多环境配置有两种方式，一种是在配置文件中指定环境，一种是用maven中指定文件

通过配置文件

使用spring.profiles.active配置项

application.ymlserver:port: 8080
spring:profiles:active: dev

application-dev.ymlspring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTCusername: rootpassword: root

通过maven

通过maven控制环境有个好处就是可以直接通过idea右侧的maven管理功能控制项目环境

pom.xml<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion>
...<build><resources><resource><directory>src/main/resources</directory><excludes><exclude>application*.yml</exclude></excludes></resource><resource><directory>src/main/resources</directory><filtering>true</filtering><includes><include>application.yml</include><include>application-${env}.yml</include></includes></resource></resources></build><profiles><profile><id>dev</id><activation><!-- 默认激活的环境 --><activeByDefault>true</activeByDefault></activation><properties><env>dev</env></properties></profile><profile><id>prod</id><properties><env>prod</env></properties></profile></profiles></project>

application.ymlspring:profiles:active: @env@
server:port: 8080

application-dev.ymlspring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTCusername: rootpassword: root