[JAVA] JAVA로 URL 호출하여 데이터 주고 받기

JAVA - JAVA로 URL 호출하여 데이터 주고 받기

Get으로 호출할때의 내용

=================================================================================================================
String message = t.get(“http://localhost:9090/user/info”);
message = message.replaceAll(“"”, “”).replaceAll(“\{“, “”).replaceAll(“\}”, “”);
String [] tempMessage = message.split(“,”);
HashMap<String,String> messageMap = new HashMap();
for(int i=0;i<tempMessage.length;i++) {
messageMap.put((tempMessage[i].split(“:”))[0], (tempMessage[i].split(“:”))[1]);
}
=================================================================================================================

Post으로 호출할때의 내용

=================================================================================================================
post(“https://localhost:9090/user/create”,”{"userId": "kimsungchul" , "userName" : "김성철"}”);

사용할 유틸 클래스

=================================================================================================================
package com.main;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

//Java 로 외부 URL호출하여 데이터 가져오는 클래스
public class Test {

/**  
 * @param strUrl 호출 URL  
 * @return return 값  
 * @throws NoSuchAlgorithmException  
 * @throws KeyManagementException  
 */  
public String get(String strUrl) throws NoSuchAlgorithmException, KeyManagementException  
{  
    BufferedReader br = null;  
    String returnString="";  
    try  
    {  
        URL url = new URL(strUrl);  
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {  
        	public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
        		return null;  
        	}  
  
        	public void checkClientTrusted(X509Certificate[] certs, String authType){  
        	}  
  
        	public void checkServerTrusted(X509Certificate[] certs, String authType) {  
        	}  
        } };  
  
        SSLContext sc = SSLContext.getInstance("SSL");  
        sc.init(null, trustAllCerts, new java.security.SecureRandom());  
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());  
  
        HttpURLConnection con = (HttpURLConnection) url.openConnection();  
        con.setConnectTimeout(5000); //서버에 연결되는 Timeout 시간 설정  
        con.setReadTimeout(5000); // InputStream 읽어 오는 Timeout 시간 설정  
        con.setRequestMethod("GET");   //            con.setRequestProperty("Content-Type", "application/json");  
  
        /*  
         * URLConnection에 대한 doOutput 필드값을 지정된 값으로 설정한다.  
         * URL 연결은 입출력에 사용될 수 있다. URL 연결을 출력용으로 사용하려는 경우 DoOutput 플래그를 true로 설정하고,  
         * 그렇지 않은 경우는 false로 설정해야 한다. 기본값은 false이다.  
         */  
        con.setDoOutput(false);  
  
        StringBuffer sb = new StringBuffer();  
        if (con.getResponseCode() == HttpURLConnection.HTTP_OK){  
            br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));  
  
            String line = null;  
            while ((line = br.readLine()) != null){  
                sb.append(line).append("\n");  
            }  
            returnString = sb.toString();  
            System.out.println("GET Rest API Url="+strUrl+", responseStr=" + sb.toString());  
        }else{  
        	System.out.println("GET Rest API Url="+strUrl+", responseCode="+con.getResponseCode()+", responseMessage=" + con.getResponseMessage());  
        }  
    }catch(IOException ioe){  
    	System.out.println("GET Rest API Url="+strUrl+", exceptionMessage="+ioe.getMessage());  
    }finally{  
        if(br != null){try{br.close();}catch(IOException e){}}  
    }  
  
    return returnString;  
}  
  
/**  
 * @param strUrl - 호출 URL  
 * @param jsonMessage - 전달할 데이터  
 * @throws NoSuchAlgorithmException  
 * @throws KeyManagementException  
 */  
public void post(String strUrl, String jsonMessage) throws NoSuchAlgorithmException, KeyManagementException{  
    OutputStreamWriter wr = null;  
    BufferedReader br = null;  
  
    try {  
        URL url = new URL(strUrl);  
  
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {  
        	public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
        		return null;  
        	}  
  
        	public void checkClientTrusted(X509Certificate[] certs, String authType){  
        	}  
  
        	public void checkServerTrusted(X509Certificate[] certs, String authType) {  
        	}  
        } };  
  
        SSLContext sc = SSLContext.getInstance("SSL");  
        sc.init(null, trustAllCerts, new java.security.SecureRandom());  
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());  
  
        HttpURLConnection con = (HttpURLConnection) url.openConnection();  
        con.setConnectTimeout(5000); //서버에 연결되는 Timeout 시간 설정  
        con.setReadTimeout(5000); // InputStream 읽어 오는 Timeout 시간 설정  
        con.setRequestMethod("POST");  
        con.setRequestProperty("Content-Type", "application/json");   //            con.setDoInput(true);  
        con.setDoOutput(true); //POST 데이터를 OutputStream으로 넘겨 주겠다는 설정   //            con.setUseCaches(false);   //            con.setDefaultUseCaches(false);  
  
        wr = new OutputStreamWriter(con.getOutputStream());  
        wr.write(jsonMessage); //json 형식의 message 전달  
        wr.flush();  
  
        StringBuffer sb = new StringBuffer();  
        if(con.getResponseCode() == HttpURLConnection.HTTP_OK){  
            br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));  
  
            String line = null;  
            while((line = br.readLine()) != null){  
            	System.out.println("### line : " + line);  
            	System.out.println( con.getResponseMessage());  
                sb.append(line).append("\n");  
            }  
  
            System.out.println("POST Rest API Url="+strUrl+", responseStr=" + sb.toString());  
        }else{  
        	System.out.println("POST Rest API Url="+strUrl+", responseCode="+con.getResponseCode()+", responseMessage=" + con.getResponseMessage());  
        }  
    }catch(IOException ioe){  
    	System.out.println("POST Rest API Url="+strUrl+", exceptionMessage="+ioe.getMessage());  
    }finally{  
        if(br != null){try{br.close();}catch(IOException e){}}  
        if(wr != null){try{wr.close();}catch(IOException e){}}  
    }  
  
}   }  

=================
package com.main;

import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;

public class Main {
public static void main(String[]args) throws KeyManagementException, NoSuchAlgorithmException {
String username=”kimsc1218”;
String loginIp=”10.203.0.50”;
String message=””;
Test t = new Test();
HashMap<String,String> messageMap = new HashMap();
//message = t.get(“https://aaaaaa.co.kr/api/sso/user/check/idms/”kimsc1218);

	//message = t.post("https://aaaaaa.aa.co.kr/api/sso/user/check/insideCheck","{\"loginId\": \""+username+"\" , \"loginIp\" : \""+loginIp+"\"}");  
  
	//message  =t.post("https://aaaaaa.aa.co.kr/api/sso/user/check/inside","{\"loginId\": \""+username+"\" , \"loginIp\" : \""+loginIp+"\"}");  
	if(!message.equals("")) {  
		message = message.replaceAll("\"", "").replaceAll("\\{", "").replaceAll("\\}", "");  
		String [] tempMessage = message.split(",");  
		for(int i=0;i<tempMessage.length;i++) {  
			messageMap.put((tempMessage[i].split(":"))[0], (tempMessage[i].split(":"))[1]);  
		}  
	}  
  
	System.out.println(messageMap.get("status"));  
	System.out.println(messageMap.get("response"));  
	System.out.println(messageMap.get("errorCode"));  
	System.out.println(messageMap.get("errorMessage"));  
  
	if(messageMap.get("response").equals("true")) {  
  
	}  
  
	//t.get("https://sungchul.com/auth/admin/serverinfo");  
}  

}

==================================================================================================================================================
package com.main;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

//Java 로 외부 URL호출하여 데이터 가져오는 클래스
public class Test {

/**  
 * @param strUrl 호출 URL  
 * @return return 값  
 * @throws NoSuchAlgorithmException  
 * @throws KeyManagementException  
 */  
public String get(String strUrl) throws NoSuchAlgorithmException, KeyManagementException  
{  
    BufferedReader br = null;  
    String returnString="";  
    try  
    {  
        URL url = new URL(strUrl);  
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {  
        	public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
        		return null;  
        	}  
  
        	public void checkClientTrusted(X509Certificate[] certs, String authType){  
        	}  
  
        	public void checkServerTrusted(X509Certificate[] certs, String authType) {  
        	}  
        } };  
  
        SSLContext sc = SSLContext.getInstance("SSL");  
        sc.init(null, trustAllCerts, new java.security.SecureRandom());  
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());  
  
        HttpURLConnection con = (HttpURLConnection) url.openConnection();  
        con.setConnectTimeout(5000); //서버에 연결되는 Timeout 시간 설정  
        con.setReadTimeout(5000); // InputStream 읽어 오는 Timeout 시간 설정  
        con.setRequestMethod("GET");  

// con.setRequestProperty(“Content-Type”, “application/json”);

        /*  
         * URLConnection에 대한 doOutput 필드값을 지정된 값으로 설정한다.  
         * URL 연결은 입출력에 사용될 수 있다. URL 연결을 출력용으로 사용하려는 경우 DoOutput 플래그를 true로 설정하고,  
         * 그렇지 않은 경우는 false로 설정해야 한다. 기본값은 false이다.  
         */  
        con.setDoOutput(false);  
  
        StringBuffer sb = new StringBuffer();  
        if (con.getResponseCode() == HttpURLConnection.HTTP_OK){  
            br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));  
  
            String line = null;  
            while ((line = br.readLine()) != null){  
                sb.append(line).append("\n");  
            }  
            returnString = sb.toString();  
            System.out.println("GET Rest API Url="+strUrl+", responseStr=" + sb.toString());  
        }else{  
        	System.out.println("GET Rest API Url="+strUrl+", responseCode="+con.getResponseCode()+", responseMessage=" + con.getResponseMessage());  
        }  
    }catch(IOException ioe){  
    	System.out.println("GET Rest API Url="+strUrl+", exceptionMessage="+ioe.getMessage());  
    }finally{  
        if(br != null){try{br.close();}catch(IOException e){}}  
    }  
  
    return returnString;  
}  
  
/**  
 * @param strUrl - 호출 URL  
 * @param jsonMessage - 전달할 데이터  
 * @throws NoSuchAlgorithmException  
 * @throws KeyManagementException  
 */  
public String post(String strUrl, String jsonMessage) throws NoSuchAlgorithmException, KeyManagementException{  
	String returnString="";  
	OutputStreamWriter wr = null;  
    BufferedReader br = null;  
  
    try {  
        URL url = new URL(strUrl);  
  
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {  
        	public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
        		return null;  
        	}  
  
        	public void checkClientTrusted(X509Certificate[] certs, String authType){  
        	}  
  
        	public void checkServerTrusted(X509Certificate[] certs, String authType) {  
        	}  
        } };  
  
        SSLContext sc = SSLContext.getInstance("SSL");  
        sc.init(null, trustAllCerts, new java.security.SecureRandom());  
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());  
  
        HttpURLConnection con = (HttpURLConnection) url.openConnection();  
        con.setConnectTimeout(5000); //서버에 연결되는 Timeout 시간 설정  
        con.setReadTimeout(5000); // InputStream 읽어 오는 Timeout 시간 설정  
        con.setRequestMethod("POST");  
        con.setRequestProperty("Content-Type", "application/json");   //            con.setDoInput(true);  
        con.setDoOutput(true); //POST 데이터를 OutputStream으로 넘겨 주겠다는 설정   //            con.setUseCaches(false);   //            con.setDefaultUseCaches(false);  
  
        wr = new OutputStreamWriter(con.getOutputStream());  
        wr.write(jsonMessage); //json 형식의 message 전달  
        wr.flush();  
        System.out.println("#### jsonMessage : " + jsonMessage);  
        StringBuffer sb = new StringBuffer();  
        if(con.getResponseCode() == HttpURLConnection.HTTP_OK){  
            br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));  
  
            String line = null;  
            while((line = br.readLine()) != null){  
            	System.out.println("### line : " + line);  
            	System.out.println( con.getResponseMessage());  
                sb.append(line).append("\n");  
            }  
            returnString = sb.toString();  
            System.out.println("POST Rest API Url="+strUrl+", responseStr=" + sb.toString());  
        }else{  
        	System.out.println("POST Rest API Url="+strUrl+", responseCode="+con.getResponseCode()+", responseMessage=" + con.getResponseMessage());  
        }  
    }catch(IOException ioe){  
    	System.out.println("POST Rest API Url="+strUrl+", exceptionMessage="+ioe.getMessage());  
    }finally{  
        if(br != null){try{br.close();}catch(IOException e){}}  
        if(wr != null){try{wr.close();}catch(IOException e){}}  
    }  
  
    return returnString;  
  
}   }  

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