Spring boot 梳理

1. 
2. 

3. @RestController
   @EnableAutoConfiguration
   public class App 
   {
       @RequestMapping("/hello")
       public HashMap<String,String> hello(){
           HashMap<String,String> result=new HashMap<String,String>();
           result.put("name", "jt");
           return result;
           
       }
       public static void main( String[] args )
       {
           SpringApplication.run(App.class, args);
       }
   }