HttpConnection Get / Post 사용법

HttpConnection Get / Post 사용법

HttpConnection을 이용하여 Get방식과 Post방식으로 내용을 가져온다.

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;

import javax.net.ssl.HttpsURLConnection;

public class HttpConn {

    public static final String USER_AGENT = "Mozilla/5.0";

    public static void main(String[] args) throws Exception{
        HttpConn httpConn = new HttpConn();

        System.out.println("HttpConnect Get");
        httpConn.sendGet();

        System.out.println("HttpConnect Post");
        httpConn.sendPost();
        
        System.out.println("HttpsConnect Post");
        httpConn.sendPostHttps();



    }


    /**
     * Get 방식
     * @throws Exception
     */
    private void sendGet() throws Exception {
        String url = "http://bobr2.tistory.com/";

        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        //전송방식
        con.setRequestMethod("GET");
        //Request Header 정의
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setConnectTimeout(10000);       //컨텍션타임아웃 10초
        con.setReadTimeout(5000);           //컨텐츠조회 타임아웃 5총

        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'GET' request to URL : " + url);
        System.out.println("Response Code : " + responseCode);

        Charset charset = Charset.forName("UTF-8");
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(),charset));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        System.out.println("조회결과 : " + response.toString());
    }

    /**
     * Post 방식
     * Https
     * @throws Exception
     */
    private void sendPostHttps() throws Exception {

        String url = "https://selfsolve.apple.com/wcResults.do";
        String urlParameters = "sn=C02G8416DRJM&cn=&locale=&caller=&num=12345";
        URL obj = new URL(url);
        HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

        //add reuqest header
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        con.setConnectTimeout(10000);       //컨텍션타임아웃 10초
        con.setReadTimeout(5000);           //컨텐츠조회 타임아웃 5총
        // Send post request
        con.setDoOutput(true);              //항상 갱신된내용을 가져옴.
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + urlParameters);
        System.out.println("Response Code : " + responseCode);

        Charset charset = Charset.forName("UTF-8");
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(),charset));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        System.out.println(response.toString());
    }


    /**
     * Post 방식
     * Https
     * @throws Exception
     */
    private void sendPost() throws Exception {

        String url = "http://bobr2.tistory.com/";
        String urlParameters = "?Param1=aaaa"
                +"&Param2=bbbb";
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        //add reuqest header
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        con.setConnectTimeout(10000);       //컨텍션타임아웃 10초
        con.setReadTimeout(5000);           //컨텐츠조회 타임아웃 5총
        // Send post request
        con.setDoOutput(true);              //항상 갱신된내용을 가져옴.
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + urlParameters);
        System.out.println("Response Code : " + responseCode);

        Charset charset = Charset.forName("UTF-8");
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(),charset));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        System.out.println(response.toString());
    }
}