Spring 다른 웹사이트 요청

ConnectService.java

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import org.springframework.stereotype.Service;

@Service

public class ConnectService {

  private final String USER_AGENT = "Mozilla/5.0";

  private final String DATA = "test data";

 

  public String get(String url) throws IOException {

    URL url2 = new URL(url);

    HttpURLConnection connection = (HttpURLConnection) url2.openConnection();

   

    connection.setRequestMethod("GET");    // GET 방식 요청

    connection.setRequestProperty("User-Agent", USER_AGENT);

   

    int responseCode = connection.getResponseCode();

   

    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

    StringBuffer stringBuffer = new StringBuffer();

    String inputLine;

   

    while ((inputLine = bufferedReader.readLine()) != null)  {

      stringBuffer.append(inputLine);

    }

    bufferedReader.close();

   

    String response = stringBuffer.toString();

    System.out.println("response:"+response);

   

    return response;

  }

 

  public String post(String url) throws IOException {

    URL url2 = new URL(url);

    HttpURLConnection connection = (HttpURLConnection) url2.openConnection();

   

    connection.setRequestMethod("POST");     // POST 방식 요청

    connection.setRequestProperty("User-Agent", USER_AGENT);

    connection.setDoOutput(true);

   

    DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());

    outputStream.writeBytes(DATA);

    outputStream.flush();

    outputStream.close();

   

    int responseCode = connection.getResponseCode();

    System.out.println("resposneCode:"+responseCode);

   

    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

    StringBuffer stringBuffer = new StringBuffer();

    String inputLine;

   

    while ((inputLine = bufferedReader.readLine()) != null)  {

      stringBuffer.append(inputLine);

    }

    bufferedReader.close();

   

    String response = stringBuffer.toString();

    System.out.println("response:"+response);

   

    return response;

  }

}

ConnectController.java

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import com.example.demo.connect.ConnectService;

@Controller

@RequestMapping("/connect")

public class ConnectController {

  @Autowired

  private ConnectService svc;

 

  @GetMapping("/json")

  @ResponseBody

  public String json() throws IOException {

    String response = svc.get("http://localhost:7878/json");

    return response;

  }

}