socket的简单运用01上传下载文件

pc机的远程主机程序

send.java

import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * filename  : send.java
 * company   : **** Limited (android) 2012-2015 
 * compiler  : eclipse 3.7.1
 * remark    : TODO 
 * created   : 2012-3-5 weeds
 * changed   : 后来者居下
 */

/**
 * filename : TODO
 */
public class send {

    /**
     * @param args
     */
    static File fname;
    static int port=8888;
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try {
            readFile("d.txt");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public static void SendFile(String fileName)
    {
        fname=new File(fileName);
        try {
            fname.createNewFile();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    public static void readFile(String fileName) throws IOException
    {
        Socket cs=null;
        try{
            System.out.println("正在等待连接...");
            ServerSocket ss=new ServerSocket(port);
            while(true){
                String filePath="D:\\yc.rar";
                File fi=new File(filePath);
                System.out.println("文件长度是："+(int)fi.length());
                cs=ss.accept();
                System.out.println("建立socket链接");
                DataInputStream dis=new DataInputStream(new BufferedInputStream(cs.getInputStream()));
                dis.readByte();
                DataInputStream fdata=new DataInputStream(new BufferedInputStream(new FileInputStream(filePath)));
                DataOutputStream ps=new DataOutputStream(cs.getOutputStream());
                ps.writeUTF(fi.getName());
                ps.flush();
                ps.writeLong((long)fi.length());
                ps.flush();
                byte[] b=new byte[102400];
                while(true){
                    int read=0;
                    if(fdata!=null){
                        read=fdata.read(b);
                        
                    }
                    if(read==-1){
                            return ;
                        }
                    ps.write(b, 0, read);
                    ps.flush();
                    fdata.close();
                      
                    dis.close();
                    cs.close(); 
                    ss.close();
                }
            }    
            
        }catch (Exception e) {
            // TODO: handle exception
            
        }
    }
    
    
    
    
    

}