我開發了一個客戶端服務器java應用程序,並使用ObjectOutputStream和ObjectInputStream在客戶端和服務器進程之間發送和接收數據。我需要發送Array或對象或原始數據 ,但是當我使用ObjectOutputStream和ObjectInputStream發送和接收原始值(writeDouble(),readDouble(),writeUTF(),readUTF())時會出現問題。該計劃暫停並停止工作。爲什麼,這是什麼問題?在客戶端和服務器進程之間使用ObjectInputStream和ObjectOutputStream
這些都是我的節目的片段
// client program
ObjectOutputStream toServer;
ObjectInputStream fromServer;
// Establish connection with the server
Socket socket = new Socket(host, 7000);
// Create an output stream to the server
toServer = new ObjectOutputStream(socket.getOutputStream());
fromServer = new ObjectInputStream(socket.getInputStream());
double num1 = Double.parseDouble(jtf1.getText().trim());
double num2 = Double.parseDouble(jtf2.getText().trim());
try {
toServer.writeUTF("multiply");
toServer.writeDouble(num1);
toServer.writeDouble(num2);
double result = fromServer.readDouble();
res.setText(String.valueOf(result));
} catch (IOException ex) {
System.err.println(ex);
}
// server program
private ObjectOutputStream outputToClient;
private ObjectInputStream inputFromClient;
// Create a server socket
ServerSocket serverSocket = new ServerSocket(7000);
while (true) {
// Listen for a new connection request
Socket socket = serverSocket.accept();
System.out.println("connect ");
outputToClient = new ObjectOutputStream(socket.getOutputStream());
// Create an input stream from the socket
inputFromClient =
new ObjectInputStream(socket.getInputStream());
while(true) {
// Read from input
String command = inputFromClient.readUTF();
System.out.println("receive command");
checkRequest(command);
}
// Write to the file
//outputToFile.writeObject(object);
}
public void checkRequest(String cmd){
//Object o = null;
try{
if(cmd.equals(MULTIBLY)){
double x = inputFromClient.readDouble();
double y = inputFromClient.readDouble();
double result = x*y;
outputToClient.writeDouble(result);
System.out.println("send result");
}else if (cmd.equals(DIVIDE)){
int x = inputFromClient.readInt();
int result = 1000/x;
outputToClient.writeDouble(result);
}
} catch(IOException io){
}
}
當我改變的ObjectOutputStream和ObjectInputStream的DataOutputStream類 和DataInputStream類的每一件事情去正確!
感謝它現在正常工作:) – sahar 2011-12-26 16:38:10
在發送數據和接收數據之前使用flush()? – 2014-05-15 14:24:57