title: How to send param by POST method in spring boot?
body: <p>I want to send params by POST method in spring boot but the param is all time null.</p>
  
  <pre><code>@RequestMapping(value = "/upload", method = RequestMethod.POST)
  public String upload(@RequestParam(value = "path", defaultValue = "") String path) {
      return "hello " + path;
  }
  </code></pre>
  
  <p>when I trying to testing It this error was appeared</p>
  
  <pre><code>{
    "timestamp": 1512262419197,
    "status": 500,
    "error": "Internal Server Error",
    "exception": "org.springframework.web.bind.MissingPathVariableException",
    "message": "Missing URI template variable 'path' for method parameter of type String",
    "path": "/upload"
  }
  </code></pre>