title: Error Running Spring Boot Application
body: <p>Am new to spring boot.Any time I run my spring boot app, i get error.
  Need help in running my spring boot application.</p>
  
  <p>error message:
  Whitelabel Error Page</p>
  
  <p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p>
  
  <p>Mon Oct 10 10:39:54 WAT 2016
  There was an unexpected error (type=Not Found, status=404).
  No message available</p>
  
  <p>code:</p>
  
  <pre><code>    package hello;
  
      import org.springframework.ui.Model;
      import org.springframework.web.bind.annotation.RequestMapping;
      import org.springframework.web.bind.annotation.RequestParam;
      import org.springframework.web.bind.annotation.RestController;
  
      @RestController
      public class GreetingController {
  
          @RequestMapping("/greeting")
          public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
              model.addAttribute("name", name);
              return "greeting";
          }
  
      }
  
  
  package com.HelloWorld;
  
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  public class HelloWorldApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(HelloWorldApplication.class, args);
      }
  }
  
   - greeting.html
  
  &lt;!DOCTYPE HTML&gt;
  &lt;html xmlns:th="http://www.thymeleaf.org"&gt;
  &lt;head&gt;
      &lt;title&gt;Getting Started: Serving Web Content&lt;/title&gt;
      &lt;meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;p th:text="'Hello, ' + ${name} + '!'" /&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>