[英]Reading and Writing array of int socket programming, java
我的客户端类应该从用户那里获取10个整数输入,并将其发送到服务器。 服务器应接受这10个数字并对其进行排序。 然后应将阵列发送回客户端,客户端应打印它们。 我的客户代码是:
public class TCPClient {
public static void main(String[] args) throws UnknownHostException, IOException {
int arr[]=new int[10];
int arrFromServer[]=new int[10];
BufferedReader inFromUser= new BufferedReader(new InputStreamReader(System.in));
Socket clientSocket = new Socket("localhost",6786);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
for(int i=0;i<10;i++)
arr[i]=Integer.parseInt(inFromUser.readLine());
for(int i=0;i<10;i++)
outToServer.writeInt(arr[i]);
for(int i=0;i<10;i++)
arrFromServer[i]=Integer.parseInt(inFromServer.readLine());
for (int i = 0; i < arrFromServer.length; i++) {
System.out.println("From Server::"+arrFromServer[i]);
}
clientSocket.close();
}
}
我的服务器代码是:
public class TCPServer {
public static void main(String[] args) throws IOException {
int arrFromClient[]=new int[10];
ServerSocket welcomeSocket = new ServerSocket(6786);
while(true){
Socket connectionSocket = welcomeSocket.accept();
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
for(int i=0;i<10;i++)
{
arrFromClient[i]=Integer.parseInt(inFromClient.readLine());
}
Arrays.sort(arrFromClient);
for (int i = 0; i < arrFromClient.length; i++) {
outToClient.writeInt(arrFromClient[i]);
}
}
}
}
当我尝试运行代码时,客户端将继续接受数字,直到我手动终止程序为止。 理想情况下,在输入10次之后,它应该转到服务器,服务器应该给出排序后的数组。
上面的代码有什么问题。 任何帮助将不胜感激。 提前致谢。
您根本无法将Integer.parseInt(inFromClient.readLine())
与writeInt()
混合使用,您需要使用DataOutputStream
写入整数,并使用DataInputStream
读取它们,以确保您的整数将使用相同的协议正确地序列化和反序列化/算法。
服务器:
int arrFromClient[]=new int[10];
ServerSocket welcomeSocket = new ServerSocket(6786);
while(true){
Socket connectionSocket = welcomeSocket.accept();
DataInputStream inFromClient = new DataInputStream(connectionSocket.getInputStream());
DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
for(int i=0;i<10;i++) {
arrFromClient[i] = inFromClient.readInt();
}
Arrays.sort(arrFromClient);
for (int i = 0; i < arrFromClient.length; i++) {
outToClient.writeInt(arrFromClient[i]);
}
}
客户:
int arr[]=new int[10];
int arrFromServer[]=new int[10];
Scanner inFromUser= new Scanner(System.in);
try (Socket clientSocket = new Socket("localhost",6786)) {
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
DataInputStream inFromServer = new DataInputStream(clientSocket.getInputStream());
for(int i=0;i<10;i++)
arr[i]=inFromUser.nextInt();
for(int i=0;i<10;i++)
outToServer.writeInt(arr[i]);
for(int i=0;i<10;i++)
arrFromServer[i]=inFromServer.readInt();
for (int i = 0; i < arrFromServer.length; i++) {
System.out.println("From Server::"+arrFromServer[i]);
}
}
另外,您可以使用ObjectOutputStream
和ObjectInputStream
来写和读取数组,并将其作为对象使用下一个方法writeObject
和readObject
:
服务器:
ServerSocket welcomeSocket = new ServerSocket(6786);
while(true){
Socket connectionSocket = welcomeSocket.accept();
ObjectInputStream inFromClient = new ObjectInputStream(connectionSocket.getInputStream());
ObjectOutputStream outToClient = new ObjectOutputStream(connectionSocket.getOutputStream());
int[] arrFromClient = (int[]) inFromClient.readObject();
Arrays.sort(arrFromClient);
outToClient.writeObject(arrFromClient);
}
客户:
int arr[]=new int[10];
Scanner inFromUser= new Scanner(System.in);
try (Socket clientSocket = new Socket("localhost",6786)) {
ObjectOutputStream outToServer = new ObjectOutputStream(clientSocket.getOutputStream());
ObjectInputStream inFromServer = new ObjectInputStream(clientSocket.getInputStream());
for(int i=0;i<10;i++)
arr[i]=inFromUser.nextInt();
outToServer.writeObject(arr);
int[] arrFromServer = (int[])inFromServer.readObject();
for (int i = 0; i < arrFromServer.length; i++) {
System.out.println("From Server::"+arrFromServer[i]);
}
}
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