AJAX未加载JSON对象

I'm trying to do a simple GET request with an acronym finder API but for some reason the JSON is not being returned. Here is the code:

   $.ajax('http://www.nactem.ac.uk/software/acromine/dictionary.py?sf=DOD', {
    crossDomain:true, 
    dataType: "jsonp", 
    success: function(data){
      console.log(data);
    }
});

If I visit the url directly in my browser, I can easily see the requested JSON, but my Chrome console only returns:

Resource interpreted as Script but transferred with MIME type text/plain: "http://www.nactem.ac.uk/software/acromine/dictionary.py?sf=DOD&callback=jQuery1111025898682116530836_1417074190743&_=1417074190744".

The Chrome Debugger network tab indicates that the correct file was downloaded but why isn't the JSON being logged to the console?

Try using this

$.ajax('http://www.nactem.ac.uk/software/acromine/dictionary.py?sf=DOD', {
  crossDomain:true, 
  dataType: "json", 
  contentType: "application/json",
  success: function(data){
    console.log(data);
  }
});

The error message indicates that the response MIME type is 'text/plain'. But it is expecting a Script MIME type.

So you need to setup your response at backend dictionary.py (if it is under your control). Add content-type "application/x-javascript" to the response header. Something similar to (in Java):

@RequestMapping(value = "/test/fake")
public void testFake(HttpServletRequest request,
        HttpServletResponse response) throws IOException {
    String callback = request.getParameter("jsonpcallback");
    SimpleJson json = new SimpleJson("Success", 0);
    JSONObject resultJSON = JSONObject.fromObject(json);
    response.setContentType("application/x-javascript");   // Set content-type to "application/x-javascript"
    PrintWriter out = response.getWriter();
    if (callback == null) {
        out.println("{error: 'Callback function is not defined.'}");
    } else
        out.println(callback + "(" + resultJSON.toString(1, 1) + ")");
}