JAVA客户端与服务端通信问题

给你个小例子参考一下吧：

public class Server{       
    publicstatic void main(String[] args){             
        try{
            ServerSocket s = newServerSocket(9000);
            while (true) {
                Socket incoming =s.accept();
                try{
                    FileInputStreamfstream = new FileInputStream("Server.java"); //假设输入文件为Server.java
                    DataInputStream in =new DataInputStream(fstream);
                    BufferedReaderbr = new BufferedReader(new InputStreamReader(in));
                    OutputStreamostream = incoming.getOutputStream();
                    PrintWriterout = new PrintWriter(ostream, true);
                    String strLine;
                    while ((strLine =br.readLine()) != null) {
                        out.println(strLine);
                    }
                    in.close();
                } finally {
                    incoming.close();
                }
            } 
        }catch (Exception e){ 
            e.printStackTrace();
        }
    }
}

客户端Client.java:

import java.io.*;
import java.net.*;
import java.util.*; 
public class Client{       
    publicstatic void main(String[] args){
        try {
            Sockets = new Socket("localhost", 9000);
            try {
                InputStreaminStream = s.getInputStream();
                Scannerin = new Scanner(inStream);
                PrintWriter out = newPrintWriter("test.txt");//假设输出文件为test.txt
                while(in.hasNextLine()){
                    Stringline = in.nextLine();
                    System.out.println(line);
                    out.println(line);
                }
                out.close();
            } finally {
                s.close();
            } 
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}