从网络服务返回图像

Question

I want to make request to a web service which will return an image based on request parameter? What is the best possible approach for this?

Answer 1

Simply make a Servlet serving image, pass the parameter to it process image based on param and return as a response, This would serve as a rest web service, You could also go for some standard implementation of webservice to achieve this

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Also Check

• BalusC's implementation of image servlet

Answer 2

By web service you mean something in the web, or a Web Service using SOAP over HTTP?

If it's the first thing I should write a Servlet that depending on request parameters write the bytes of the image to the output stream (setting appropiate headers like Content-Type).

doGet(...) {
   request.setContentHeader("Content-Type", "image/jpeg");
   // write image bytes to request.getOutputStream()
   ...
}

If it's the second thing simply return a byte[] with the content. Or... if you need also the content-type, return a structure with content-type: string and data: byte[] .