过滤器中获取json数据

判断是不是 json请求

 //获取json
   HttpServletRequest request = (HttpServletRequest) servletRequest;
        String contentType = request.getContentType();
        String paramJson = "";
        if ("application/json; charset=UTF-8".equals(contentType)) {
            paramJson = this.getJsonParam((HttpServletRequest) servletRequest);
        }

获取json数据



    /**
     * 获取Json数据
     *
     * @param request
     * @return
     */
    private String getJsonParam(HttpServletRequest request) {

        String jsonParam = "";
        ServletInputStream inputStream = null;
        try {
            int contentLength = request.getContentLength();
            if (!(contentLength < 0)) {
                byte[] buffer = new byte[contentLength];
                inputStream = request.getInputStream();
                for (int i = 0; i < contentLength; ) {
                    int len = inputStream.read(buffer, i, contentLength);
                    if (len == -1) {
                        break;
                    }
                    i += len;
                }
                jsonParam = new String(buffer, "utf-8");
            }
        } catch (IOException e) {
            log.error("参数转换成json异常g{}", e);
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    log.error("参数转换成json异常s{}", e);
                }
            }
        }
        return jsonParam;
    }

返回json

 HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setCharacterEncoding("utf-8");
        response.setContentType("application/json; charset=utf-8");
        String result = "";

        PrintWriter writer = null;
        try {
            writer = response.getWriter();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            writer.print(result);
            writer.flush();
            writer.close();
        }

来源：CSDN

作者：你笑的像一条狗

链接：https://blog.csdn.net/weixin_38361347/article/details/104502997

标签

大数据

string

response