JOSN返回中文问号解决方案 亲测

@ResponseBody
	@RequestMapping(value = "Department")
	public String getDepartment(ModelMap modelMap)	
	ObjectMapper mapper = new ObjectMapper(); // 创建json序列化对象
           

String json = mapper.writeValueAsString(allSd);//将对象转换成json
	return json ;
}
           

写上注解ResponseBody直接将json返回