TCP/IP socket (간단한 server/client)

간단한 TCP/IP Server

 종료 처리 하기 전까지 무한 반복하는 방식임

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ServerSocket server = new ServerSocket([[서버 포트]]);   while (true) {     Socket socket = server.accept();       //----[ 데이터 받아서 처리하기 ]----------------------------------------       InputStream       inputStream       = socket.getInputStream();     InputStreamReader inputStreamReader = new InputStreamReader(inputStream);     BufferedReader    bufferedReader    = new BufferedReader(inputStreamReader);       String data   = "";     char[] chars  = new char[256];     int    length;     while ((length = bufferedReader.read(chars)) != -1) {         String newData = new String(chars, 0, length);             // 새로 전송받은 데이터(newData) 처리         data += newData;     }       [[전송받은 전체 데이터(data) 처리]]       //----[ Client에게 데이터 보내기 ]----------------------------------------       OutputStream       outputStream       = socket.getOutputStream();     OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream);     PrintWriter        printWriter        = new PrintWriter(outputStreamWriter);       printWriter.print([[보낼 데이터]]);     printWriter.flush();       //----[ Client와의 연결 종료 ]----------------------------------------           printWriter.close();     outputStreamWriter.close();     outputStream.close();       bufferedReader.close();     inputStreamReader.close();     inputStream.close();       socket.close();       // 전송받은 전체 데이터가 종료 명령이면 break }   server.close();

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간단한 TCP/IP Client

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Socket socket = new Socket("[[IP]]", [[Port]]);   //----[ Server에게 데이터 보내기 ]----------------------------------------   OutputStream       outputStream       = socket.getOutputStream(); OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream); PrintWriter        printWriter        = new PrintWriter(outputStreamWriter);           printWriter.print([[보낼 내용]]); printWriter.flush();   //----[ Server가 보내는 값 받아서 처리하기 ]----------------------------------------   InputStream       inputStream       = socket.getInputStream(); InputStreamReader inputStreamReader = new InputStreamReader(inputStream); BufferedReader    bufferedReader    = new BufferedReader(inputStreamReader);   String data   = ""; char[] chars  = new char[256]; int    length; while ((length = bufferedReader.read(chars)) != -1) {     String newData = new String(chars, 0, length);       // 새로 전송받은 데이터(newData) 처리     data += newData; }       [[전송받은 전체 데이터(data) 처리]]   //----[ Server와의 연결 종료 ]----------------------------------------   bufferedReader.close(); inputStreamReader.close(); inputStream.close();   printWriter.close(); outputStreamWriter.close(); outputStream.close();   socket.close();