我试图实现一个客户端 - 服务器应用程序,其中服务器可以接受来自客户端的一些对象,并且对于每个对象,它必须将其解释为消息并且妥善处理。套接字服务器在同一个进程中一次只接受一个连接
下面是代码:
(服务器)
public class GlobalServer{
GlobalServer(){new Thread(() ->{
try {
serverSocket = new ServerSocket(1234);
Socket clientSocket;
while (true) {
clientSocket = serverSocket.accept();
handleClient(clientSocket);
}
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}).start();
}
public void handleClient(Socket clientSocket) throws IOException, ClassNotFoundException{
ObjectInputStream is = new ObjectInputStream(clientSocket.getInputStream());
Object [] objArr = (Object[]) is.readObject();
msgHandler(objArr, clientSocket);
}
public void msgHandler(Object [] objArr, Socket clientSocket){
int msg_type = (int) objArr[0];
switch (msg_type) {
case 1:
System.out.println("type 1 received");
break;
case 2:
System.out.println("type 2 received");
break;
case 3:
System.out.println("type 3 received");
break;
default:
break;
}
}
public static void main(String [] args){
GlobalServer s = new GlobalServer();
}
}
OBS:上的应用是有意义,因为每个消息中携带它的报头(类型)和它的内容为接收对象的阵列
(客户端)
public class Client {
public static void main(String [] args){
try {
Socket client = new Socket("192.168.0.105", 1234);
ObjectOutputStream os = new ObjectOutputStream(client.getOutputStream());
Object [] objArr = {3, "Type 3 message"};
os.writeObject(objArr);
Object []objArr1 = {1, "Type 1 message"};
os.writeObject(objArr1);
} catch (IOException e) {
e.printStackTrace();
}
}
}
我对组合通道运行GlobalServer的实例吃了机器,并在另一台机器上连接到服务器,并顺序发送两条消息。问题在于服务器只接收并处理第一条消息,第二条消息丢失,客户端没有服务器接收到第二条消息。奇怪的是,如果我将这两个messagens作为两个不同的aplications发送,服务器就可以很好地处理它。这与在同一过程中发送的两条消息有关吗?
代码工作作为diferent aplications:
(消息1)
public class Message1 {
public static void main(String [] args){
try {
Socket client = new Socket("192.168.0.105", 1234);
ObjectOutputStream os = new ObjectOutputStream(client.getOutputStream());
Object [] objArr = {3, "Type 3 message"};
os.writeObject(objArr);
} catch (IOException e) {
e.printStackTrace();
}
}
}
(消息2)
public class Message2 {
public static void main(String [] args){
try {
Socket client = new Socket("192.168.0.105", 1234);
ObjectOutputStream os = new ObjectOutputStream(client.getOutputStream());
Object []objArr1 = {1, "Type 1 message"};
os.writeObject(objArr1);
} catch (IOException e) {
e.printStackTrace();
}
}
}
尝试写他们通过os.flush到的ObjectOutputStream() – Sanjeev
同样的事情后,冲洗你的对象,然后处理第一个忽略了同样的过程 –