原生 servlet 接收和发送 json

接收

private  String getBodyStr(javax.servlet.http.HttpServletRequest request) throws IOException {
        BufferedReader reader = request.getReader();
        String readLine = "";
        StringBuffer strBuf = new StringBuffer();
        while ((readLine = reader.readLine()) != null){
            strBuf.append(readLine);
            logger.info(readLine);
        }
        readLine = strBuf.toString();
        return readLine;
    }

发送

private void writeOut(javax.servlet.http.HttpServletResponse response, String data) throws IOException {
       response.setContentType("application/json;charset=UTF-8");
        ServletOutputStream outputStream = response.getOutputStream();
        outputStream.write(data.getBytes("UTF-8"));
        outputStream.flush();

    }