Programa de conversação do servidor cliente Java
Tenho um código da internet para um cliente e servidor comunicarem em java. Modifiquei-o um pouco, para que o servidor e o cliente possam conversar um com o outro.
inicialmente o meu cliente envia uma mensagem para o servidor, depois servidor para cliente, depois cliente para servidor e continua...(um não pode enviar mais do que uma mensagem continuamente para o outro). Para isso, há um código básico colocado no ciclo while de modo que a conversa vai de 1 para 1. Mas como eu pus o laço while, a mensagem do servidor não é recebido pelo cliente. Se não houver nenhum laço while (que eu comentei no código aqui), então primeiro a mensagem é enviada pelo cliente para o servidor e, em seguida, servidor para o cliente e o programa pára.
Por favor, ajuda-me a fazer a conversa ir sem parar.//SERVER
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
private static Socket socket;
public static void main(String[] args)
{
try
{
int port = 25000;
ServerSocket serverSocket = new ServerSocket(port);
socket = serverSocket.accept();
System.out.println("Server Started and listening to the port 25000");
//while(true){
//Server is running always. This is done using this while(true) loop
//Reading the message from the client
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String number = br.readLine();
System.out.println("Received from client: "+number+"\n");
BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
String s = bufferRead.readLine();
//Sending the response back to the client.
OutputStream os = socket.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
bw.write(s);
bw.flush();
System.out.println("Sent (to " + socket + ") client: "+s+"\n");
//String abc = bufferRead.readLine();
//System.out.println("SAA");
//}
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
socket.close();
}
catch(Exception e){}
}
}
}
//CLIENT
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.Socket;
public class Client {
private static Socket socket;
public static void main(String args[])
{
try
{
String host = "localhost";
int port = 25000;
InetAddress address = InetAddress.getByName(host);
socket = new Socket(address, port);
//while(true){
//Send the message to the server
OutputStream os = socket.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));
String s = bufferRead.readLine();
String sendMessage = s + "\n";
bw.write(sendMessage);
bw.flush();
System.out.println("Sent to server: " +sendMessage+"\n");
//Get the return message from the server
InputStream is = socket.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
System.out.println(socket);
String message = br.readLine();
System.out.println("Received from server: "+message+"\n");
//}
}
catch (Exception exception)
{
exception.printStackTrace();
}
finally
{
//Closing the socket
try
{
socket.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
0
4 answers
Server.java
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;
public class Server implements Runnable {
ServerSocket serversocket;
BufferedReader br1, br2;
PrintWriter pr1;
Socket socket;
Thread t1, t2;
String in="",out="";
public Server() {
try {
t1 = new Thread(this);
t2 = new Thread(this);
serversocket = new ServerSocket(5000);
System.out.println("Server is waiting. . . . ");
socket = serversocket.accept();
System.out.println("Client connected with Ip " + socket.getInetAddress().getHostAddress());
t1.start();;
t2.start();
} catch (Exception e) {
}
}
public void run() {
try {
if (Thread.currentThread() == t1) {
do {
br1 = new BufferedReader(new InputStreamReader(System.in));
pr1 = new PrintWriter(socket.getOutputStream(), true);
in = br1.readLine();
pr1.println(in);
} while (!in.equals("END"));
} else {
do {
br2 = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = br2.readLine();
System.out.println("Client says : : : " + out);
} while (!out.equals("END"));
}
} catch (Exception e) {
}
}
public static void main(String[] args) {
new Server();
}
}
Client.java
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.*;
public class Client implements Runnable {
BufferedReader br1, br2;
PrintWriter pr1;
Socket socket;
Thread t1, t2;
String in = "", out = "";
public Client() {
try {
t1 = new Thread(this);
t2 = new Thread(this);
socket = new Socket("localhost", 5000);
t1.start();;
t2.start();
} catch (Exception e) {
}
}
public void run() {
try {
if (Thread.currentThread() == t2) {
do {
br1 = new BufferedReader(new InputStreamReader(System.in));
pr1 = new PrintWriter(socket.getOutputStream(), true);
in = br1.readLine();
pr1.println(in);
} while (!in.equals("END"));
} else {
do {
br2 = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = br2.readLine();
System.out.println("Server says : : : " + out);
} while (!out.equals("END"));
}
} catch (Exception e) {
}
}
public static void main(String[] args) {
new Client();
}
}
3
Author: Don Chakkappan, 2014-03-28 17:44:38
Primeiro você tem que salvar este código na unidade C do seu computador, em seguida, abrir duas janelas de comando prompt. Depois tens de escrever "clientes javac".java "na janela de clientes e" javac server.java "na janela do servidor , depois de pressionar o botão enter escreva "clientes java" e "servidor java" e desfrute de conversação.
//server.java
import java.io.*;
import java.net.*;
public class server {
public static void main(String []V){
try{
ServerSocket ss = new ServerSocket(1201);
Socket s = ss.accept();
DataInputStream Din = new DataInputStream(s.getInputStream());
DataOutputStream Dout = new DataOutputStream(s.getOutputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String MsgIn="",MsgOut="";
while(!MsgIn.equals("end")){
MsgIn = Din.readUTF();
System.out.println(MsgIn);
MsgOut = br.readLine();
Dout.writeUTF(MsgOut);
Dout.flush();
}
s.close();
}catch(Exception e){
}
}
}
//clients.java
import java.io.*;
import java.net.*;
import javax.xml.crypto.Data;
public class clients {
public static void main(String []S){
try{
Socket s = new Socket("192.168.0.103",1201);//my pc's ip
//Socket s = new Socket("192.168.0.100",1201);
DataInputStream Din = new DataInputStream(s.getInputStream());
DataOutputStream Dout = new DataOutputStream(s.getOutputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String MsgIn="",MsgOut="";
while(!MsgIn.equals("end")){
MsgOut = br.readLine();
Dout.writeUTF(MsgOut);
MsgIn = Din.readUTF();
System.out.println(MsgIn);
}
}catch(Exception e){
}
}
} 0
Author: Samiul Islam Sami, 2015-05-17 07:54:34
//server.java
import java.io.*;
import java.net.*;
public class server {
public static void main(String []V){
try{
ServerSocket ss = new ServerSocket(1201);
Socket s = ss.accept();
DataInputStream Din = new DataInputStream(s.getInputStream());
DataOutputStream Dout = new DataOutputStream(s.getOutputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String MsgIn="",MsgOut="";
while(!MsgIn.equals("end")){
MsgIn = Din.readUTF();
System.out.println(MsgIn);
MsgOut = br.readLine();
Dout.writeUTF(MsgOut);
Dout.flush();
}
s.close();
}catch(Exception e){
}
}
}
//clients.java
import java.io.*;
import java.net.*;
import javax.xml.crypto.Data;
public class clients {
public static void main(String []S){
try{
Socket s = new Socket("192.168.0.103",1201);//my pc's ip
//Socket s = new Socket("192.168.0.100",1201);
DataInputStream Din = new DataInputStream(s.getInputStream());
DataOutputStream Dout = new DataOutputStream(s.getOutputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String MsgIn="",MsgOut="";
while(!MsgIn.equals("end")){
MsgOut = br.readLine();
Dout.writeUTF(MsgOut);
MsgIn = Din.readUTF();
System.out.println(MsgIn);
}
}catch(Exception e){
}
}
} 0
Author: shivshankar, 2016-07-21 05:43:32
import java.io.*;
import java.net.*;
class serversvi1
{
public static void main(String svi[])throws IOException
{
try
{
ServerSocket servsock=new ServerSocket(5510);
DataInputStream dis=new DataInputStream(System.in);
System.out.println("enter the file name");
String fil=dis.readLine();
System.out.println(fil+" :is file transfer");
File myfile=new File(fil);
while(true)
{
Socket sock=servsock.accept();
byte[] mybytearray=new byte[(int)myfile.length()];
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(myfile));
bis.read(mybytearray,0,mybytearray.length);
OutputStream os=sock.getOutputStream();
os.write(mybytearray,0,mybytearray.length);
os.flush();
sock.close();
}
}
catch(Exception saranvi)
{
System.out.print(saranvi);
}
}
}
import java.io.*;
import java.net.*;
class clientsvi1
{
public static void main(String svi[])throws IOException
{
try
{
Socket sock=new Socket("localhost",5510);
byte[] bytearray=new byte[1024];
InputStream is=sock.getInputStream();
DataInputStream dis=new DataInputStream(System.in);
System.out.println("enter the file name");
String fil=dis.readLine();
FileOutputStream fos=new FileOutputStream(fil);
BufferedOutputStream bos=new BufferedOutputStream(fos);
int bytesread=is.read(bytearray,0,bytearray.length);
bos.write(bytearray,0,bytesread);
System.out.println("out.txt file is received");
bos.close();
sock.close();
}
catch(Exception SVI)
{
System.out.print(SVI);
}
}
}
0
Author: r.m.Vivek Arni, 2016-07-21 06:57:10