I tried to implement a send-receive example via a socket but It didn't work well. The sender sends the data successfully and the Receiver receives the data and shown in the console but I want to save this data in a file and I couldn't. As I noticed that the receiver keeps listeninig without ending the while loop. So can anyone help me to solve this problem ?
The Sender module
import java.io.*;
import java.net.*;
import java.util.*;
public class UDPSend {
public static void main(String[] args) throws IOException
{
FileInputStream fstream = new FileInputStream("T.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
File file = new File("T.txt");
FileInputStream fis = new FileInputStream(file);
byte[] fsize = new byte[(int) file.length()];
int size = fis.read(fsize);
System.out.println("Size = " + size);
InetAddress addr = InetAddress.getByName("localhost");
byte[] buf = new byte[10000];
String DataLine;
while ((DataLine = br.readLine()) != null)
{
DatagramPacket packet =new DatagramPacket(DataLine.getBytes(), DataLine.length() , addr, 4555);
System.out.println (DataLine);
DatagramSocket socket = new DatagramSocket();
socket.send(packet);
}//end while loop
}//end main method
}
The Receiver module
import java.io.*;
import java.net.*;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
public class UDPRecieve {
public static void main(String args[]) throws Exception
{
FileWriter fw = new FileWriter(new File("D:/JavaPrograms/Multimedia-proj-2/src/outtt.txt"));
fw.write("hi");
try{
//DatagramSocket serverSocket = new DatagramSocket(4555);
DatagramSocket Socket = new DatagramSocket(4555);
byte[] receiveData = new byte[1000000];
// byte[] sendData = new byte[1024];
//while(true)
while(receiveData !=null)
{
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
Socket.receive(receivePacket);
String sentence = new String( receivePacket.getData());
fw.write(sentence);
fw.flush();
System.out.printf("RECEIVED: %s " , new String(receivePacket.getData()));
//System.out.println("Done");
//InetAddress IPAddress = receivePacket.getAddress();
//int port = receivePacket.getPort();
//String capitalizedSentence = sentence.toUpperCase();
/* sendData = capitalizedSentence.getBytes();
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, IPAddress, port);
serverSocket.send(sendPacket);*/
}
fw.flush();
fw.close();
} catch (Exception e) {
System.err.println(e);
}
}
}
Thanks in advance.
You can achive it by following code changes.In Receiver class make changes in following loop.
while (receiveData != null) {
DatagramPacket receivePacket = new DatagramPacket(receiveData,
receiveData.length);
Socket.receive(receivePacket);
String sentence = new String(receivePacket.getData());
fw.write(sentence.trim());
fw.flush();
System.out.printf("RECEIVED: %s ", new String(receivePacket
.getData()));
// System.out.println("Done");
// InetAddress IPAddress = receivePacket.getAddress();
// int port = receivePacket.getPort();
// String capitalizedSentence = sentence.toUpperCase();
/*
* sendData = capitalizedSentence.getBytes(); DatagramPacket
* sendPacket = new DatagramPacket(sendData, sendData.length,
* IPAddress, port); serverSocket.send(sendPacket);
*/
}
EDIT
Complete Code of the Program which is running successfully.
Sender
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class UDPSend {
public static void main(String[] args) throws IOException
{
FileInputStream fstream = new FileInputStream("D:/T.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
File file = new File("D:/T.txt");
FileInputStream fis = new FileInputStream(file);
byte[] fsize = new byte[(int) file.length()];
int size = fis.read(fsize);
System.out.println("Size = " + size);
InetAddress addr = InetAddress.getByName("localhost");
byte[] buf = new byte[10000];
String DataLine;
while ((DataLine = br.readLine()) != null)
{
DatagramPacket packet =new DatagramPacket(DataLine.getBytes(), DataLine.length() , addr, 4555);
System.out.println (DataLine);
DatagramSocket socket = new DatagramSocket();
socket.send(packet);
}//end while loop
}//end main method
}
Receiver
import java.io.File;
import java.io.FileWriter;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
public class UDPReceive {
public static void main(String args[]) throws Exception {
FileWriter fw = new FileWriter(new File(
"D:/outtt.txt"));
fw.write("hi");
try {
// DatagramSocket serverSocket = new DatagramSocket(4555);
DatagramSocket Socket = new DatagramSocket(4555);
byte[] receiveData = new byte[1000000];
// byte[] sendData = new byte[1024];
// while(true)
while (receiveData != null) {
DatagramPacket receivePacket = new DatagramPacket(receiveData,
receiveData.length);
Socket.receive(receivePacket);
String sentence = new String(receivePacket.getData());
fw.write(sentence.trim());
fw.flush();
System.out.printf("RECEIVED: %s ", new String(receivePacket
.getData()));
// System.out.println("Done");
// InetAddress IPAddress = receivePacket.getAddress();
// int port = receivePacket.getPort();
// String capitalizedSentence = sentence.toUpperCase();
/*
* sendData = capitalizedSentence.getBytes(); DatagramPacket
* sendPacket = new DatagramPacket(sendData, sendData.length,
* IPAddress, port); serverSocket.send(sendPacket);
*/
}
fw.flush();
fw.close();
} catch (Exception e) {
System.err.println(e);
}
}
}