我正在从javascript函数对后端进行JSONP调用，以获取json中的响应数据。 从Java端如何做到这一点？

Question

I am triggering the below crossdomain JSONP call from javascript using ajax:

$.ajax({ 
  url: 'https://xyz.abc.com/xxx/xxx/client', 
  type: 'POST', 
  dataType: 'jsonp', 
  jsonpCallback: 'callback',
  data:{ id: '123456' },
  crossDomain: true,
  contentType: 'application/jsonp'
});

Below are the Query string parameters as seen from the network tab:-

callback=callback&id=123456&_=1498907401152

But due to security and to prevent vulnerability I want to do this call from Java end. How can I do an equivalent JSONP call as posted above from java end? I am using a Struts2 action class.

Answer 1

At Here you read:

JSONP is simply a hack to allow web apps to retrieve data across domains. It could be said that it violates the Same Origin Policy (SOP). The way it works is by using Javascript to insert a "script" element into your page.

So when you want to use Java end, you don't need JSONP. Just do a JSON HTTP POST (like here ) in your action, process response and fill your action and return SUCCESS.