我正在尝试编写一个简单的客户端/服务器Echo应用程序,我的客户端似乎正在发送输入,但服务器似乎没有将其接收并将其发回。
这是服务器:
import java.io.*;
import java.net.*;
public class Server
{
public static void main(String args[]) throws Exception
{
int port = 2000;
ServerSocket serverSocket;
Socket client;
BufferedReader is = null;
BufferedWriter os = null;
serverSocket = new ServerSocket(port);
System.err.println("Server established on port " + port);
client = serverSocket.accept();
System.err.println("Client connected");
is = new BufferedReader(
new InputStreamReader(client.getInputStream()));
os = new BufferedWriter(
new OutputStreamWriter(client.getOutputStream()));
System.err.println("Server established on port " + port);
String message = "";
while((message = is.readLine()) != null)
{
System.err.println("Messaged received " + message);
os.write(message);
}
is.close();
os.close();
serverSocket.close();
}
}
然后,客户端看起来像这样:
import java.io.*;
import java.net.Socket;
public class Client
{
public static void main(String args[]) throws Exception
{
String host = "localhost";
int port = 2000;
Socket socket;
socket = new Socket(host, port);
BufferedReader is = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
BufferedWriter os = new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream()));
System.err.println("Connected to " + host + " on port " + port);
BufferedReader br =
new BufferedReader(new InputStreamReader(System.in));
String input = "";
while((input = br.readLine()) != null)
{
System.out.println("Sending " + input);
os.write(input);
System.out.println("Receiving " + is.read());
}
is.close();
os.close();
socket.close();
}
}
我错过了什么,我确信我忽略了一些简单的事情。
答案 0 :(得分:2)
在客户端中,尝试使用最终换行符char:
编写消息os.write(input+"\n");
(或同时致电newLine()
)
那是因为服务器正在逐行阅读。