ajax返回中文乱码问题

@RequestMapping(value="/release", method=RequestMethod.POST)
public @ResponseBody ResponseEntity<String> release(Comment comment, @RequestParam("userId") String userId){
		
	commentService.publish(comment,userId);
	PageModel<LessonCommentVo> pageModel = this.getCommentData(comment.getLessonId());
	String commentHTML = this.getCommentHTML(pageModel);
	HttpHeaders responseHeaders = new HttpHeaders();
        responseHeaders.setContentType(new MediaType("text","html",Charset.forName("UTF-8"))); 
	return new ResponseEntity<String>(commentHTML, responseHeaders, HttpStatus.OK);
}