springmvc @ResponseBody乱码，兼容UTF-8格式

在spring mvc中，@ResponseBody返回的默认编码为ISO-8859-1，但是实际需要的是UTF-8，所以需要转换,添加produces = "application/json; charset=utf-8"，如下所示

	@RequestMapping(value = "/select",produces = "application/json; charset=utf-8")
	@ResponseBody  
	public String getSelectTagByCategory(@RequestParam Map<String,String> data) {
		StringBuffer sb = new StringBuffer();
		
		return ();
	}