java - 如何在JAVA客户端添加JSON输入

Question

我正在构建一个代码来调用 Post Web 服务。所以我无法添加 JSON 输入。我的 JSON 输入必须是这样的:

{ 
  "patientId": 13, 
  "timeType": 0, 
  "date": "19/08/2019", 
  "countryID" : "Central Europe Standard Time" 
}

这是我的代码:

URL url = new URL("http://stgsd.appsndevs.com/AppCardioAPI/api/Resource/GetZephyrECGDataByPatientId");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Accept", "application/json");
conn.setRequestProperty("Content-Type", "application/json");


if (conn.getResponseCode() != 200) {
    throw new RuntimeException("Failed : HTTP error code : "
        + conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
                        (conn.getInputStream())));
ObjectMapper mapper = new ObjectMapper();
RRImportData parsed = mapper.readValue(conn.getInputStream(), RRImportData.class);

如何设置 JSON 输入对象？

Answer 1

请执行以下操作:

    RRImportData data = new RRImportData();
    data.setPatientId("abcd");
    //set othe attributes..

    URL url = new URL(
            "http://stgsd.appsndevs.com/AppCardioAPI/api/Resource/GetZephyrECGDataByPatientId");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setDoInput(true);
    conn.setDoOutput(true);
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Accept", "application/json");
    conn.setRequestProperty("Content-Type", "application/json");



    ObjectMapper mapper = new ObjectMapper();
    String payload = mapper.writeValueAsString(data);

    conn.setDoOutput(true);
    BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream()));
    wr.write(payload);
    wr.flush();
    wr.close();

    if (conn.getResponseCode() != 200) {
        throw new RuntimeException("Failed : HTTP error code : "
                + conn.getResponseCode());
    }
    BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));

在这里，首先我们将 POJO RRImportData 转换为字符串，然后将其作为有效负载写入您的 POST 请求。 BufferedReader br可用于读取从服务器获得的响应。