http request java

HttpURLConnection 사용

https://jar-download.com/artifacts/org.json

Download org.json JAR files with all dependencies

 

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class HttpURL {
    public static void main(String[] args) throws IOException {
        //요청메소드설정
        String method = "POST";

        //url설정
        String url = "https://huqeyhi95c.execute-api.ap-northeast-2.amazonaws.com/prod/start";

        //헤더 설정
        Map<String,String> headers = new HashMap<>();
        headers.put("Content","application/json");
        headers.put("Accept","application/json");
        headers.put("X-Auth-Token","5dfa6a9da3f3ea4b22164c5a8de648ea");

        //파라미터 설정
        Map<String, Object> params = new HashMap();
        params.put("problem", "1");

        //결과받기
        JSONObject response = requestJson(method, url,headers,params);

        //결과 데이터 사용
        String auth_key = (String)response.get("auth_key");
        int pr = (Integer) response.get("problem");
        int tm = (Integer) response.get("time");

        System.out.printf("authKey = %s, pr = %d, tm = %d",auth_key,pr,tm);
    }

    public static JSONObject requestJson(String method,String urlString,Map<String, String> headers, Map<String, Object> params) throws IOException {
        URL url = new URL(urlString);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        //요청 방식 설정
        con.setRequestMethod(method);

        //헤더 설정
        for(String key:headers.keySet()){
            con.setRequestProperty(key,headers.get(key));
        }
        con.setDoOutput(true);

        if(!params.isEmpty()) {        //파라미터 맵을 제이슨 오브젝트 형식으로 변경
            JSONObject json = new JSONObject(params);

            try (OutputStream os = con.getOutputStream()) {
                byte[] input = json.toString().getBytes("utf-8");
                os.write(input, 0, input.length);
            }
        }
        try (BufferedReader br = new BufferedReader(
            new InputStreamReader(con.getInputStream(), "utf-8"))) {
            StringBuilder response = new StringBuilder();
            String responseLine = null;
            while ((responseLine = br.readLine()) != null) {
                response.append(responseLine.trim());
            }
            //System.out.println(response.toString());
            return new JSONObject(response.toString());
        }
    }
}

 

 

 

 

 

아파치 사용

Download this library as a jar and put it in your libs folder

HttpCore : http://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore/4.4.1

HttpClient : http://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient/4.5

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.apache.commons.logging.LogFactory;

import java.net.URI;

class Test
{
    static String x_auth_token="5dfa6a9da3f3ea4b22164c5a8de648ea";
    static String baseURL = "https://huqeyhi95c.execute-api.ap-northeast-2.amazonaws.com/prod";

    public static void main(String[] args) throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {
            HttpUriRequest httppost = RequestBuilder.post()
                    .setUri(new URI(baseURL+"/start"))
                    .addHeader("X-Auth-Token",x_auth_token)
                    .addHeader("Content-Type","application/json")
                    .addParameter("problem", "0")
                    .build();

            CloseableHttpResponse response = httpclient.execute(httppost);
            try {
                System.out.println(EntityUtils.toString(response.getEntity()));
            } finally {
                response.close();
            }
        } finally {
            httpclient.close();
        }
    }
}