SpringBoot通过Environment方式，获取yml配置文件中参数

application.yml文件如下：

mail:
  host: www.126
  port: 25
  user: account
  address: account@126
  password: account321
  nickname: 邮箱演示

读取代码：

@SpringBootTest
class DemoApplicationTests {
   private static Environment env;

   @Autowired
   public void init(Environment env) {
      DemoApplicationTests.env = env;
   }
   @Test
   void contextLoads() {
      System.out.print(DemoApplicationTests.env.getProperty("mail.host"));
   }

}

完整项目参考http://www.zrscsoft/sitepic/12123.html