Java Code - FileUpload (http & https) 파일,파라메터,JSON데이터등을 같이 전송

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.Files;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
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;

/**
 * @author emunhi
 *
 */
public class HttpsClient {
    
    public static void mainxx(String[] args) {
        String boundary = Long.toHexString(System.currentTimeMillis());
        System.out.println(boundary);
    }

    public static void main(String[] args) throws Exception {

        // 업로드할 서버 URL
        String url = "https://localhost:18443/fileupload";
        String charset = "UTF-8";
        
        File textFile = new File("D:/logs/mmc.txt");
        File binaryFile = new File("D:/logs/aaaaa.apk");
        
        // Unique한 값 설정 (boundary를 위한 값)
        String boundary = Long.toHexString(System.currentTimeMillis());
        String CRLF = "\r\n"; // Line separator required by multipart/form-data.

        //SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        //System.out.println("001 :" + sdf.format(new Timestamp(System.currentTimeMillis())));
        
        /**=======================================================================================
         * URLConnection.openConnection() 실행전에 아래 실행하면
         * SSL인증에대한 ignore  
         *=======================================================================================*/
        trustSSL();
        /**======================================================================================*/
        
        URLConnection connection = new URL(url).openConnection();
        connection.setDoOutput(true);
        connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
        connection.setRequestProperty("User-Agent", "curl/7.74.0");

        try (OutputStream output = connection.getOutputStream();
                PrintWriter writer = new PrintWriter(new OutputStreamWriter(output, charset), true);) {
            
            // Send normal parameter.
            writer.append("--" + boundary).append(CRLF);
            writer.append("Content-Disposition: form-data; name=\"param1\"").append(CRLF);
            writer.append("Content-Type: text/plain; charset=" + charset).append(CRLF);
            writer.append(CRLF).append("sddfasdfasd");
            writer.append(CRLF).flush(); // ※중요※ CRLF 는 boundary의 끝을 의미.
            
            // Send JSON
            writer.append("--" + boundary).append(CRLF);
            writer.append("Content-Disposition: form-data; name=\"jsonData\"").append(CRLF);
            writer.append("Content-Type: application/json; charset=" + charset).append(CRLF);
            writer.append(CRLF).append("{\"app_type\":\"001\"}");
            writer.append(CRLF).flush(); // ※중요※ CRLF 는 boundary의 끝을 의미.

            // Send text file.
            writer.append("--" + boundary).append(CRLF);
            writer.append("Content-Disposition: form-data; name=\"textFile\"; filename=\"" + textFile.getName() + "\"").append(CRLF);
            writer.append("Content-Type: text/plain; charset=" + charset).append(CRLF); 
            writer.append(CRLF).flush();
            Files.copy(textFile.toPath(), output);
            output.flush(); // ※중요 반드시 flush()
            writer.append(CRLF).flush(); // ※중요※ CRLF 는 boundary의 끝을 의미.

            // Send binary file.
            writer.append("--" + boundary).append(CRLF);
            writer.append("Content-Disposition: form-data; name=\"binaryFile\"; filename=\"" + binaryFile.getName() + "\"").append(CRLF);
            writer.append("Content-Type: application/octet-stream").append(CRLF);
            writer.append("Content-Transfer-Encoding: binary").append(CRLF);
            writer.append(CRLF).flush();
            Files.copy(binaryFile.toPath(), output);
            output.flush(); // ※중요 반드시 flush()
            writer.append(CRLF).flush(); // ※중요※ CRLF 는 boundary의 끝을 의미.

            // End of multipart/form-data.
            writer.append("--" + boundary + "--").append(CRLF).flush(); // ※중요※ CRLF 는 boundary의 끝을 의미.
        }

        // 반드시 reponse결과값을 취득해애 연결이 종료된다.( 안하면 파일업로드 실패)
        int responseCode = ((HttpURLConnection) connection).getResponseCode();
        
        // 종료 후 결과값을 수신처리시 읽어처리
        BufferedReader br = null;
        if (responseCode == 200) {
            br = new BufferedReader(new InputStreamReader(((HttpURLConnection) connection).getInputStream()));
            String strCurrentLine;
                while ((strCurrentLine = br.readLine()) != null) {
                       System.out.println(strCurrentLine);
                }
        } else {
            br = new BufferedReader(new InputStreamReader(((HttpURLConnection) connection).getErrorStream()));
            String strCurrentLine;
                while ((strCurrentLine = br.readLine()) != null) {
                       System.out.println(strCurrentLine);
                }
        }

    }

    /**
     * SSL 인증서에 대해 모두 신뢰하도록 처리를 한다.
     */
    public static void trustSSL() {
        try {
            TrustManager[] trustAllCerts = new TrustManager[] { 
                new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                    }
                    @Override
                    public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                    }
                    @Override
                    public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[0];
                        //return null;
                    }
                } 
            };
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, trustAllCerts, new SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}