Spring Boot 读取配置文件中自定义配置的变量

示例application.properties

server.port=8888

spring.datasource.url=jdbc:mysql://localhost:3306/LJingDev
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

testconfig.name=dev
testconfig.age=17

或者使用application.yml

server:
    port: 8888

spring:
    datasource:
        driverClassName: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/LJingDev
        username: root
        password: 123456

testconfig:
    name: dev
    age: 18

在需要的变量上添加@Value注解 + SpEL 注入配置中的值

@Component
public class Testconfig {
   @Value("${testconfig.name}")
   public String name;

   @Value("${testconfig.age}")
   public int age;

}

Spring Boot 读取配置文件中自定义配置的变量

原文：https://www.cnblogs.com/LJingDev/p/12709103.html