HttpURLConnection[GET,POST]

HttpURLConnection 을 사용할때 GET 방식과 POST방식이 있으며, URL파라미터[ 쿼리스트링 형식 ]로 GET 방식에 파라미터를 담아 넘길 수 있다.

하지만 현 상황은 약 6천개의 시퀀스를 넘겨야하는 상황이기에 GET방식은 알맞지 않았고 POST방식으로 아래와 같이 넘겨서 해결하였다.

 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;

import org.json.simple.JSONObject;

public class HttpConnectionUtils {

/** HttpURLConnection GET 방식 */
public static String getRequest(String targetUrl) {

String response = "";

try {

URL url = new URL(targetUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET"); // 전송 방식
conn.setDoOutput(true);
      conn.setDoInput(true);

Charset charset = Charset.forName("UTF-8");
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));

String inputLine;
      
StringBuffer sb = new StringBuffer();
while ((inputLine = br.readLine()) != null) {
sb.append(inputLine);
}
br.close();

response = sb.toString();

} catch (Exception e) {
e.printStackTrace();
}

return response;
}

  
  
/** HttpURLConnection POST 방식 */
public static String postRequest(String targetUrl, Map<String, Object> requestMap) {

String response = "";
    StringBuilder result = new StringBuilder();
    String Param = Query돌려서 나온값.
try {

URL url = new URL(targetUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST"); // 전송 방식
conn.setDoOutput(true); // URL 연결을 출력용으로 사용(true)
      conn.setDoInput(true);



BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream()));
      
      result.append(URLEncoder.encode("Param", "UTF-8"));
      result.append("=");
      result.append(URLEncoder.encode(Param, "UTF-8"));

      bw.write(result);
bw.flush();
bw.close();


Charset charset = Charset.forName("UTF-8");
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));

String inputLine;
StringBuffer sb = new StringBuffer();
while ((inputLine = br.readLine()) != null) {
sb.append(inputLine);
}
br.close();

response = sb.toString();

} catch (Exception e) {
e.printStackTrace();
}

return response;
}

private String getQuery(List<NameValuePair> params) throws UnsupportedEncodingException
{
    StringBuilder result = new StringBuilder();
    boolean first = true;

    for (NameValuePair pair : params)
    {
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.getName(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.getValue(), "UTF-8"));
    }

    return result.toString();
}

}