@RequestMapping(value = "/mypage/modifytag.do", method = RequestMethod.GET)
public String modifyTag(
@RequestParam(value = "tn", required = false) String tn,
@RequestParam("tagId") int tagId,
@RequestParam("tagName") String tagName) {
TagView tagView = tagService.getTag(tagId);
tagView.setTagName(tagName);
boolean isTag = tagService.modifyTag(tagView);
return "redirect:/mypage/managetag.do?tn=" + tn;
}