[英]Print Socket Messages to Console in java
我是Java的初学者,正在学习Socket编程。我正在使用基本的聊天服务器套接字通信。 我在将服务器和客户端消息打印到控制台窗口时遇到困难。
在设计聊天服务器窗口UI时,我也将实现此概念,并将char服务器互通消息更新到UI。 我想知道如何实现?
代码1
Server.java
package ChApp;
import java.io.IOException;
import java.net.*;
public class Server {
public static void main(String[] args) throws Exception {
Socket s;
ServerSocket server = new ServerSocket(3900);
while(true)
{
s = server.accept();
ServerHandl handle1 = new ServerHandl(s);
Thread t1= new Thread(handle1);
t1.start();
System.out.println("Connection Succesful...");
server.close();
}
}
}
Serverhandl.java
package ChApp;
import java.io.*;
import java.net.*;
public class ServerHandl implements Runnable {
Socket s= null;
BufferedReader read;
PrintWriter write;
String msg="Server is sending a sample msg";
public ServerHandl(Socket s)
{
this.s = s;
}
public void run()
{
try {
write = new PrintWriter(s.getOutputStream());
write.println(msg);
read = new BufferedReader(new InputStreamReader(s.getInputStream()));
System.out.println(read.readLine());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
try {
read.close();
write.close();
s.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
Client.java
package ChApp;
import java.io.*;
import java.net.*;
import java.util.Scanner;
public class Client {
public static void main(String[] args) throws IOException {
Socket s= null;
BufferedReader read;
PrintWriter write = null;
String h;
StringBuilder sb = new StringBuilder();
String sendmsg="Reply from client";
s= new Socket("localhost",3900);
read = new BufferedReader(new InputStreamReader(s.getInputStream()));
while((h=read.readLine())!=null)
{
sb.append(h);
}
write = new PrintWriter(s.getOutputStream(),true);
write.write(sendmsg);
write.flush();
s.close();
read.close();
write.close();
}
}
您的客户端一直在调用readLine(),直到它返回null为止,但是您的服务器正在从连接中读取数据,因此它尚未关闭它,因此null永远不会到达,因此您陷入了僵局。
从服务器读取一行 ,然后发送一个响应,然后关闭插座。 调用readLine()之后,让服务器关闭套接字。
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