application-dev.yml

server:
  servlet:
    context-path: /
  port: 8080       


boy:
  name: dulong
  age : 20

application-prod.yml

server:
  servlet:
    context-path: /
  port: 8080       

  
boy:
  name: dulong
  age : 20
  
 
 在application.yml中配置


 spring:
  profiles:
    active: prod  // prod文件报错 但是指定激活dev却可以正常获取值
    
    
error:
Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'boy.name' in value "${boy.name}"


public class HelloController {

@Autowired
private Boy boy;

@RequestMapping(value = "/hello",method = RequestMethod.GET)
public String hello() {

     return "注入组件方式获取值：name-"+boy.getName()+ " age-"+boy.getAge();

}

}