Java response返回给前端中文乱码

 

 

public void errPrint(HttpServletResponse response, String msg, Object data) {
        try {
            response.reset();
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Access-Control-Allow-Origin", "*");
            response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
            response.setContentType("application/json;charset=UTF-8");
            response.setStatus(500);
            Result result = new Result();
            result.setCode(500);
            result.setMsg(msg);
            result.setData(data);
            String s = new Gson().toJson(result);
            System.out.println(s);
            String characterEncoding = response.getCharacterEncoding();
            OutputStream ps = response.getOutputStream();
            //这句话的意思，使得放入流的数据是utf8格式
            ps.write(s.getBytes("UTF-8"));
        } catch (Exception e) {

        }
    }