kafka rest api方式写入——java程序

我不是女神ヾ 2022-06-01 06:52 493阅读 0赞

# kafka rest api方式写入——java程序 #

本文主要介绍通过rest api方的方式写入kafka

本文前提是搭建一个kafka的proxy，然后启动它。

下面上货。

private static String startPost(String path, List<LogBlock> logBlockList) {
            if (path.equals("") || logBlockList == null || logBlockList.size() == 0) {
                return "";
            }
            OutputStreamWriter out = null;
            BufferedReader in = null;
            StringBuilder result = new StringBuilder();
            try {
                URL url = new URL(path);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("POST");
                // 发送POST请求必须设置为true
                conn.setDoOutput(true);
                conn.setDoInput(true);
                //设置连接超时时间和读取超时时间
                conn.setConnectTimeout(10000);
                conn.setReadTimeout(10000);
                conn.setRequestProperty("Content-Type", "application/vnd.kafka.json.v2+json");
                conn.setRequestProperty("Accept", "application/vnd.kafka.v2+json, application/vnd.kafka+json, application/json");
    
                out = new OutputStreamWriter(conn.getOutputStream());
                StringBuffer sb = new StringBuffer();
                sb.append("{").append("\"records\": [");
                for (int i = 0; i < logBlockList.size(); i++) {
                    if (i == 0) {
                        sb.append("{").append("\"value\": ").append(logBlockList.get(i)).append("}");
                    } else {
                        sb.append(",{").append("\"value\": ").append(logBlockList.get(i)).append("}");
                    }
                }
                sb.append("]").append("}");
                out.append(sb.toString());
                out.flush();
                out.close();
                // 取得输入流，并使用Reader读取
                in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
                String line;
                while ((line = in.readLine()) != null) {
                    result.append(line);
                }
    
            } catch (Exception e) {
                e.printStackTrace();
            }
            //关闭输出流、输入流
            finally {
                try {
                    if (out != null) {
                        out.close();
                    }
                    if (in != null) {
                        in.close();
                    }
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
            return result.toString();
        }

程序调用的时候这样：

startPost("http://192.168.0.66:48082/topics/test", list);

这样就可以实现通过rest api方式批量写入kafka了。