java 模拟 post request payload

post 请求

先贴代码

public String sendCPICPostRequest(String requestUrl, String cookStr, String licenceNo, String referer, String host) {

    String payload = "{"meta":{},"redata":{"ecarvo":{"plateNo":"" + licenceNo + "","carVIN":"","plateColor":"1"}}}";
  


    StringBuffer jsonString;
    try {
        URL url = new URL(requestUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        connection.setRequestProperty("Cookie", cookStr);
        connection.setRequestProperty("Host", host);
        connection.setRequestProperty("Referer", referer);

        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
        writer.write(payload);
        writer.close();
        BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        jsonString = new StringBuffer();
        String line;
        while ((line = br.readLine()) != null) {
            jsonString.append(line);
        }
        br.close();
        connection.disconnect();
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage());
    }
    return jsonString.toString();
}