server3.java

介绍java的网络编程

import java.net.*;
import java.io.*;
public class Server3{
  private DataInputStream reader;
  private DataOutputStream writer;
  private ServerSocket server;
  private Socket socket;
  public Server3(){}
  void startServer(){
    try{
      server=new ServerSocket(7777);
      System.out.println("辑滚家南捞 积己登菌嚼聪促.");
      while(true){
        System.out.println("努扼捞攫飘甫 扁促赋聪促.");
        socket=server.accept();
        System.out.println("努扼捞攫飘客 楷搬登菌嚼聪促.");
        reader=new DataInputStream(socket.getInputStream());
        writer=new DataOutputStream(socket.getOutputStream());
        getCommand();
      }
    }catch(Exception e){
      System.out.println(e);  
    }
  }
  void getCommand(){
    try{
      while(true){
        String fileName=reader.readUTF();
        writer.writeUTF(getFileInfo(fileName));
        writer.flush();
        System.out.println(fileName +"狼 沥焊 傈价 肯丰");
      }
    }catch(Exception e){
    }finally{  
      System.out.println("努扼捞攫飘客狼 立加捞 谗板嚼聪促.");
      try{
        if(reader!=null) reader.close();
        if(writer!=null) writer.close();
        if(socket!=null) socket.close();
        reader=null; writer=null; socket=null;
      }catch(IOException ie){}
    }
  }
  String getFileInfo(String fileName){
    String fileInfo="";
    try{
      FileReader fr=new FileReader(fileName);
      BufferedReader br=new BufferedReader(fr);
      String temp;
      while((temp=br.readLine())!=null)
        fileInfo+= temp+"\n";
      br.close();
    }catch(FileNotFoundException fe){
      fileInfo="颇老捞 绝嚼聪促.";  
    }catch(IOException ie){}  
    return fileInfo;
  }
  public static void main(String[] args){
    Server3 server=new Server3();
    server.startServer();
  }
}