Jsonp跨域调用

 ???@Autowired ???private UserService userService; ???// 请求方法 GET ???// URL http://sso.taotao.com/user/check/{param}/{type} ???/** ????* 检查数据是否可用 ????* ?????* @param param ????* @param type ????* @return ????*/ ???@RequestMapping(value = "check/{param}/{type}", method = RequestMethod.GET) ???// @ResponseBody ???public ResponseEntity<String> check(HttpServletRequest request, @PathVariable String param, ???????????@PathVariable Integer type) { ???????try { ???????????Boolean bool = this.userService.check(param, type); ???????????// 1.获取callback参数 ???????????String callback = request.getParameter("callback"); ???????????// 2.判断callback是否为非空 ???????????String result = ""; ???????????if (StringUtils.isNotBlank(callback)) { ???????????????// 如果为非空，则进行伪装 ???????????????// 3.对返回结果进行包裹，伪装成js数据fun(true) ???????????????result = callback + "(" + bool + ")"; ???????????} else { ???????????????// 如果为空，不伪装，直接返回 ???????????????result = "" + bool; ???????????} ???????????// 这就是一个查询，返回200 ???????????return ResponseEntity.ok(result); ???????} catch (Exception e) { ???????????// TODO Auto-generated catch block ???????????e.printStackTrace(); ???????} ???????// 如果服务器错误，返回500 ???????return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null); ???}