Question

java socket 的问题 服务器和客户端输入没反应，在对方的命令行窗口显示不出来

import java.io.*;
import java.net.*;

public class Server {
public static void main(String[] args)throws Exception{
boolean f=true;

while(f){

try{
ServerSocket server=new ServerSocket(1234);
System.out.println("服务器在端口1234监听…………");
Socket socket=server.accept();
System.out.println("开始通信…………");
OutputStream out=socket.getOutputStream();
PrintWriter pw=new PrintWriter(out);
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
pw.write("服务器:"+reader.readLine());
InputStreamReader in=new InputStreamReader(socket.getInputStream());
BufferedReader br=new BufferedReader(in);

String message=br.readLine();
System.out.println(message);
if("bye".equals(message))
f=false;
pw.close();
br.close();
socket.close();
server.close();
}catch(Exception e){
System.out.println(e);
}
}
}
}

import java.io.*;
import java.net.*;
public class Client {

public static void main(String[] args){

boolean f2=true;
while(f2){

try{

Socket socket=new Socket("127.0.0.1",1234);

InputStream in=socket.getInputStream();
BufferedReader br=new BufferedReader(new InputStreamReader(in));
String message=br.readLine();
System.out.println(message);
OutputStream out=socket.getOutputStream();
PrintWriter pw=new PrintWriter(out);
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
pw.write("客户端:"+reader.readLine());

//服务器发来的信息
if("bye".equals(message))
f2=false;
pw.close();
br.close();
socket.close();
}catch(Exception e){
System.out.println(e);
}
}
}
}

Answer 1

package com.v512.TestServer;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;

public class TestServer {

public static void main(String[] args) {
try {
ServerSocket s=new ServerSocket(8888);
Socket s1=s.accept();

OutputStream os=s1.getOutputStream();
DataOutputStream dos=new DataOutputStream(os);

InputStream is=s1.getInputStream();
DataInputStream dis=new DataInputStream(is);

InputStreamReader isr=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(isr);

String info;
while(true){
info=dis.readUTF();
System.out.println("对方说："+info);
if(info.equals("bye"))
break;
info=br.readLine();
dos.writeUTF(info);
if(info.equals("bye"))
break;
}
dos.close();
dis.close();
s1.close();
}
catch (SocketException e) {
System.out.println("网络连接异常，程序退出！");
}
catch (IOException e) {
e.printStackTrace();
}

}

}

package com.v512.TestServer;

import java.net.Socket;
import java.net.SocketException;
import java.io.*;
public class TestClient {

public static void main(String[] args) {
try {
Socket s1 = new Socket("localhost",8888);

InputStream is=s1.getInputStream();
DataInputStream dis=new DataInputStream(is);

OutputStream os=s1.getOutputStream();
DataOutputStream dos=new DataOutputStream(os);

InputStreamReader isr=new InputStreamReader(System.in);
BufferedReader br=new BufferedReader(isr);

String info;
while(true){
info=br.readLine();
dos.writeUTF(info);
if(info.equals("bye"))
break;
info=dis.readUTF();
System.out.println("对方说："+info);
if(info.equals("bye"))
break;
}
dis.close();
dos.close();
s1.close();
} catch (SocketException e) {
System.out.println("网络连接异常，程序退出！");
} catch (IOException e) {
e.printStackTrace();
}

}

}
尝试下我改的。。。。。

Answer 2

先执行server，再执行Client,你用的127.0.0.1，别人的机器肯定是访问不了你的服务器的

Answer 3

把端口换成超过4000以后的试试