努力原创，渴望为自主研发贡献力量

import java.io.BufferedReader;//io 包提供对流进行读写的工具也是tcp套接字通信唯一途径
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;//包提供套接字工具。

import java.net.UnknownHostException;

public class RemoteFileClient {
  protected String hostIp;
  protected int hostPort;
  protected BufferedReader socketReader;//负责读数据的对象
  protected PrintWriter socketWriter;//负责写数据的对象
   public RemoteFileClient(String aHostIp,int aHostPort)
   {
   hostIp=aHostIp;
   hostPort=aHostPort;
   }
   /**
    * 向/远程服务器请求文件信息
    * @param fileNameToGet
    * @return
    */
   public String getFile(String fileNameToGet)
   {
   StringBuffer fileLines=new StringBuffer();
   try
   {
   socketWriter.println(fileNameToGet);
   socketWriter.flush();
   String line=null;
   while((line=socketReader.readLine())!=null)
   {
   fileLines.append(line+"");
   }
   }
   catch(IOException e)
   {
   System.out.println ("Error reading from file &"+fileNameToGet);
   }
   return fileLines.toString();
   }
/**
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
RemoteFileClient remoteFileClient = new RemoteFileClient("130.30.3.68", 3000);
remoteFileClient.setUpConnection();
String fileContents = remoteFileClient.getFile("c:\\RemoteFile.txt"); remoteFileClient.tearDownConnection();
System.out.println(fileContents);

}
/**
*
*连/接到远程服务器
*/
public void setUpConnection()
{
try
{
Socket client = new Socket(hostIp,hostPort);//创建socket对象
OutputStream outToServerStream=client.getOutputStream();
InputStream inFromServerStream=client.getInputStream();
//把/Socket的InputStream包装进BufferedReader 以使我们能够读取流的行
socketReader = new BufferedReader(new InputStreamReader(inFromServerStream));
socketWriter = new PrintWriter(outToServerStream);
//把/Socket的OutputStream包装进PrintWriter 以使我们能够发送文件请求到服务器 }
catch(UnknownHostException  e)
{
System.out.println("Error setting up socket connection :unknown host at "+hostIp+":"+hostPort);
}
catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
}
/**
* 从/远程服务器上断开
*
*/
public void tearDownConnection()
{
try
{
socketWriter.close();
socketReader.close();
}
catch(IOException e)
{
System.out.println("Error tearing down socket connection "+e);
}
}

}

//服务器端的
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class RemoteFileServer {
    int listendPort;
    public RemoteFileServer(int aListenPort)
    {
    listendPort=aListenPort;
    }
    public void acceptConnections() throws IOException
    {
    ServerSocket server=new ServerSocket(listendPort);
    Socket incomingConnection=null;
    while(true)
    {//&://不/断监听直到来了一个连接请求,然后交由handleConnection处理

    try {
[color=red]incomingConnection = server.accept();[/color]
    handleConnection(incomingConnection);
    }
    catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
    }
    }
    public void handleConnection(Socket incomingConnection) throws IOException
    {
    OutputStream outputToSocket = incomingConnection.getOutputStream();
    InputStream inputFromSocket = incomingConnection.getInputStream();
    BufferedReader streamReader = new BufferedReader(new InputStreamReader(inputFromSocket));
//只是获取client发送的一个文件名称，接收并且将文件的内容显示出来
    FileReader fileReader = new FileReader(new File(streamReader.readLine()));
    BufferedReader bufferedFileReader = new BufferedReader(fileReader);
    PrintWriter streamWriter = new PrintWriter(outputToSocket);
    String line = null;
    while ((line = bufferedFileReader.readLine()) != null)
    {
    streamWriter.println(line);
    }
    fileReader.close();
    streamWriter.close();
    streamReader.close();
    //切记,永远不要在关闭 Writer 之前关闭 Reader
   }

/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException
{
// TODO 自动生成方法存根
   RemoteFileServer server=new RemoteFileServer(3000);
   server.acceptConnections();
}

}