How to return large String byte and display in angularjs image RestController? [duplicate]

I am facing a problem while returning a string. I have a java code and which will convert to image. I am able to convert the image in the backend using this Java code but i need to do this in frontend.

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String fileName = "one.gif";
 String fileLocation = new File("src\\main\\resources\\static\\img").getAbsolutePath() + "\\" + fileName;
      FileOutputStream fos = new FileOutputStream(fileLocation);
 fos.write(responseString.getBytes("ISO-8859-1"));
   fos.flush();
   fos.close();

I want to return this responseString and use in angularJs. How to return form Restcontroller and use in Angular/HTML? When I return directly responseString I am getting ERRORError: [$http:baddata] http://errors.angularjs.org/1.6.4/$http/baddata? also.