我有一个程序通过套接字将客户端线程连接到电影院。 客户转移他的详细信息（客户编号，所需的门票）影院在另一个线程中处理请求，以确保有足够的座位可用。 正如您将在代码中看到的那样，我在确定如何从影院（服务器）向客户端发送反馈时遇到了一些问题，所提供的代码未完成，我只想让您了解它的外观。 我的想法是将dataOutputStream传输到cinemaThread，当它完成后，影院线程会通过流将反馈返回给客户端是否可能？
客户端
import java.util.Random;
/**
* this class in designed to define client properties
* @author David and Adam
*
*/
public class Client extends Thread{
private int serialNumber;
private int NumberOfTickets;
private String creditNumber;
private String serverPort;
private int rowNumber;
/**
* full constructor
* @param serialNumber
* @param NumberOfTickets
* @param creditNumber
*/
public Client(int serialNumber){
this.serialNumber = serialNumber;
this.NumberOfTickets = generateTicketNumber();
this.creditNumber = generateCreditNumber();
this.rowNumber = -1;
}
/**
* returns a value in the required number of ticket range.
* @return
*/
private int generateTicketNumber(){
return (new Random()).nextInt(Constants.MaxNumberOfTickets-1)+Constants.MinNumberOfTickets;
}
/**
* returns a random credit number constructed of 16 digits.
* @return
*/
private String generateCreditNumber(){
String s = String.valueOf((new Random()).nextInt(9)+1);
for(int i=0 ; i<16 ; i++){
s = (new Random()).nextInt()+s;
}
return s;
}
服务器端
import java.io.DataInputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
/**
* an implementation of server side defined as cinema hall
* @author David
*
*/
public class Cinema {
private int[][] cinemaHall;
private int ticketPrice;
private int securedPort;
private int numberOfRequests;
/**
* full constructor
*
*/
public Cinema(){
this.numberOfRequests = 0;
initializeCinemaHall();
setTicketPrice();
setSecuredPort();
}
/**
* initializes cinema hall to 0's
*/
private void initializeCinemaHall(){
this.cinemaHall = new int[10][10];
for(int i=0 ; i<cinemaHall.length ; i++)
for(int j=0 ; j<cinemaHall.length ; j++)
this.cinemaHall[i][j] = 0;
}
/**
* generates the ticket price on sale
*/
private void setTicketPrice(){
this.ticketPrice = Constants.TicketSalePrice;
}
/**
* sets the secured port
*
*/
private void setSecuredPort(){
this.securedPort = Constants.SecuredPort;
}
public int[][] getCinemaHall() {
return cinemaHall;
}
public void setCinemaHall(int[][] cinemaHall) {
this.cinemaHall = cinemaHall;
}
public int getTicketPrice() {
return ticketPrice;
}
public void setTicketPrice(int ticketPrice) {
this.ticketPrice = ticketPrice;
}
public int getNumberOfRequests() {
return numberOfRequests;
}
public void setNumberOfRequests(int numberOfRequests) {
this.numberOfRequests = numberOfRequests;
}
/**
* main function for establishing communication between cinema and customers
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException{
Cinema cinema = new Cinema();
ServerSocket server = new ServerSocket(Constants.ServerPort);
System.out.println("**********Yes Planet server in listening**********");
// create a connection to clients
while(cinema.numberOfRequests<Constants.MaxClientNumber){
try {
//wait for client
Socket s = server.accept();
System.out.println("Client connected to socket");
// get client info
DataInputStream dis = new DataInputStream(s.getInputStream());
String clientInfo = dis.readLine();
String[] details = clientInfo.split("/");
try {
// parse data to correct type and send data to cinema thread
Thread cinemaThread = new CinemaThread(cinema, Integer.parseInt(details[0])
, Integer.parseInt(details[1]), details[2]);
cinemaThread.start();
}
catch (Exception e){
System.out.println("An error has occured, client request have been canceled");
}
} catch (IOException e) {
System.out.println("Connection error ");
e.printStackTrace();
}
}
}
}
影院主题
public class CinemaThread extends Thread{
private int clientNumber;
private Cinema cinema;
private int requiredTickets;
private String clientCreditNumber;
private boolean occupied;
private int lineNumber;
private boolean alive;
/**
* full constructor
* @param clientNumber
* @param cinema
* @param requiredTickets
* @param clientCreditNumber
*/
public CinemaThread(Cinema cinema, int clientNumber, int requiredTickets, String clientCreditNumber){
this.clientNumber = clientNumber;
this.cinema = cinema;
this.requiredTickets = requiredTickets;
this.clientCreditNumber = clientCreditNumber;
this.occupied = false;
this.lineNumber = -1;
this.alive = true;
}
/**
* the method checks for available seats to each individual required client.
* in case an available sequence is found, cinema hall is updated with client details and a connection
* with the credit company is established forwarding the data needed to proceed.
*/
public void run(){
int ticketCount=0;
int startSeat = -1;
int endSeat = -1;
for(int i=0 ; i<cinema.getCinemaHall().length && !occupied; i++){
for(int j=0 ; j<cinema.getCinemaHall().length && !occupied; j++){
if(cinema.getCinemaHall()[i][j]>0)
ticketCount++;
else
ticketCount=0;
if(ticketCount == requiredTickets){
lineNumber = i;
startSeat = j-requiredTickets+1;
endSeat = j;
occupied=true;
}
}
for(int k=startSeat ;k<=endSeat ; k++)
cinema.getCinemaHall()[lineNumber][k] = clientNumber;
}
if(occupied){
// connection with credit company
}
this.alive = false;
}
public boolean status(){
return this.alive;
}
}
答案 0 :(得分：2)
您无需传输 DataOutputStream。使用Socket.getOutputStream()。
服务器端
public static void main(String[] args) throws IOException{
// ... ...
// Socket s = server.accept();
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
// ... ...
Thread cinemaThread = new CinemaThread( /* ... */, dos);
// ... ...
}
public CinemaThread(/* ... */, DataOutputStream dos){
// ... ...
this.dos = dos;
}
public void run(){
// ... ...
if(occupied)
dos.writeBoolean(true);
else
dos.writeBoolean(false);
// ... ...
}
答案 1 :(得分：1)
Streams通常只有一种“out”或“in”，所以通过我对这个问题的解读，不可能为这两个流使用一个流。