将json对象转化成jsonp对象

//检查 /user/check/{param}/{type}
	@RequestMapping("/check/{param}/{type}")
	@ResponseBody
	public Object check(String callback, @PathVariable String param,@PathVariable Integer type){
		
			Boolean b = userService.check(param, type);
			
			//改造返回值为jsonp格式
			MappingJacksonValue mjv = new MappingJacksonValue(SysResult.oK(b));
			mjv.setJsonpFunction(callback);
			return mjv;
}