java 怎么通过 Socket服务端 传参数

[MattHgh]

服务端代码如下

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

public class EchoServer
{
     public static void main(String[] args)
     {
         try{
             ServerSocket s = new ServerSocket(5050);
             Socket incoming = s.accept();
             
             BufferedReader in = new BufferedReader(new InputStreamReader(incoming.getInputStream()));
             PrintWriter out = new PrintWriter(incoming.getOutputStream(), true /* autoFlush */);

             out.println("55 7F 00 00 01 30");
         
             boolean done = false;
             while (!done)
             {
                 String line = in.readLine();
                 if (line == null)
                     done = true;
                 else{
                     out.println("You to Server : " + line);
                     System.out.println("Client to you :"+line);
                     if (line.trim().equals("BYE"))
                         done = true;
                 }

             }

             incoming.close();
         }
         catch (Exception e){
             System.out.println(e);
         }
     }

}

等客户端连接上后
out.println("55 7F 00 00 01 30");是往客户端发送数据吗
如果不是应该怎么给客户端发送数据

[老紫竹]

干吗发2次哦？

[duskwaitor]

public static void main(String[] args)
{
try{
ServerSocket s = new ServerSocket(5050);
Socket incoming = s.accept();

BufferedReader in = new BufferedReader(new InputStreamReader(incoming.getInputStream()));
ObjectOutputStream writer = new ObjectOutputStream(incoming.getOutputStream());
PrintWriter out = new PrintWriter(incoming.getOutputStream(), true /* autoFlush */);

out.println("55 7F 00 00 01 30");

boolean done = false;
while (!done)
{
String line = in.readLine();
if (line == null)
done = true;
else{
out.println("You to Server : " + line);
System.out.println("Client to you :"+line);

if (line.trim().equals("BYE"))
done = true;
}

}
writer.writeObject("this is the message given to client");
writer.flush();
incoming.close();
}
catch (Exception e){
System.out.println(e);
}
}

[z3h]

是王客户端发的。

[duskwaitor]

黑体字和楼主利用PrintWriter发送信息是等效的。这个黑体字填上程序很二，呵呵

[gary_jojo]

this.socket.getOutputStream().write(message);
this.socket.getOutputStream().flush();