[socket] 서버 <-> 클라이언트 간단예제

목적 : android 에서 보내는 socket 데이터가 서버에 정상적으로 들어오는지 디버깅용으로 만들었습니다.

기능 : 데이터 echo 밖에 없습니다.

1. socket server [리눅스 컴파일]

리눅스에 -java 를 설치후 진행

java -> class 컴파일

javac -d . TCPServer.java

컴파일된 class 파일 실행

java -cp . TCPServer

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import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.OutputStream;

import java.io.DataOutputStream;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

import java.io.BufferedOutputStream;

public class TCPServer implements Runnable {

 

    public static final int ServerPort = 5555;

    @Override

    public void run() {

 

        try {

            System.out.println("S: Connecting...");

            ServerSocket serverSocket = new ServerSocket(ServerPort);

 

            while (true) {

                Socket client = serverSocket.accept();

                System.out.println("S: Receiving...");

                try {

                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));

                    String str = in.readLine();

                    System.out.println("S: Received: '" + str + "'");

                    System.out.println("Server Received.len  " + String.valueOf(str.length()));

                     

                    PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())), true);

                    out.println("Server Received " + str);

                } catch (Exception e) {

                    System.out.println("S: Error");

                    e.printStackTrace();

                } finally {

                    client.close();

                    System.out.println("S: Done.");

                }

            }

        } catch (Exception e) {

            System.out.println("S: Error");

            e.printStackTrace();

        }

    }

 

    public static void main(String[] args) {

 

        Thread desktopServerThread = new Thread(new TCPServer());

        desktopServerThread.start();

 

    }

 

}

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2. socket client [ Android Studio ]

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private void socketFnc(final byte[] temp, final int step) {

Log.e("socketFnc", "sss");

//Send To Server Socket data

//http://www.codejava.net/java-se/networking/java-socket-client-examples-tcp-ip

new Thread() {

public void run() {

Log.e("socketFnc", "sss");

try {

byteToString = "";

byteToString2 = "";

Socket socket = new Socket("서버 IP", 5555);

OutputStream os = null;

OutputStreamWriter osw = null;

BufferedWriter bw = null;

//Send

OutputStream output = socket.getOutputStream();

//Log.e("bbb", "보낸 데이터 : " + bytesToHex(temp));

output.write(temp);

output.flush();

StringBuilder sb = new StringBuilder();

for (byte b : temp) {

sb.append(String.format("0x%02X ", b));

}

Log.e("sb.length()", String.valueOf(sb.length()));

int ff = sb.length() / 200;

for (int x = 0; x < ff; x++) Log.e("bbb", "보낸 데이터 : " + sb.toString().substring(x * 200, x * 200 + 200));

socket.close();

}

catch (IOException e) {

e.printStackTrace();

}

}

}

.start();

}//socketFnc

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