那些年的 网络通信之 TCP/IP 传输控制协议 ip 加 端口 客户端上传文件到服务器端服务器端返回上传成功消息

多线程开启, 客户端通过 Socket 流 上传文件到服务端的一个小程序练习.

1. 抓住阻塞式方法,去调试

2. 获取对应流对象操作对应的对象 这时候自己不能懵,一定要清晰,最好命名就能区别,一搞混了就乱了

import java.io.*;
import java.net.*;
class UpLoadDemo{
	public static void main(String [] args) throws Exception{
	int port=10085;
	String ipAddr="192.168.20.1";
	String srcFilePath="C:\Users\Ghc\Desktop\psb.jpg";
	String destFilePath="C:\Users\Ghc\Desktop\test\psb2.jpg";
	new Thread(new UploadServer(new ServerSocket(port),destFilePath)).start();
	new Thread(new UploadClient(new Socket(ipAddr,port),srcFilePath)).start();
	}
}

class UploadClient implements Runnable{
	private Socket socket;
	private BufferedInputStream socketBufIn,fileBufIn;
	private BufferedOutputStream socketBufOut;
	private String filePath;

	private int len=-1;
	private byte [] buf=new byte[1024];
	
	UploadClient(Socket socket,String filePath){
		this.socket=socket;
		this.filePath=filePath;
	}
	public void run(){
		try{
			
			fileBufIn=new BufferedInputStream(new FileInputStream(filePath));
			socketBufIn=new BufferedInputStream(socket.getInputStream());
			socketBufOut=new BufferedOutputStream(socket.getOutputStream());
			
			
			while((len=fileBufIn.read(buf))!=-1){
				socketBufOut.write(buf,0,len);
				socketBufOut.flush();
			}
			socket.shutdownOutput();
			
			len=socketBufIn.read(buf);
			System.out.println("server: "+new String(buf,0,len));
			
		}
		catch(Exception e){
			e.printStackTrace();
		}
		finally{
			if(fileBufIn!=null)
				try{
					fileBufIn.close();
					fileBufIn=null;
				}
				
				catch(Exception e){
					e.printStackTrace();
				}
			if(socket!=null) 
				try{
					socket.close();
					socket=null;
				}
				
				catch(Exception e){
					e.printStackTrace();
				}
		}
	}
}

class UploadServer implements Runnable{
	private ServerSocket serverSocket;
	private Socket socket;
	private String destFilePath;
	private BufferedInputStream socketBufIn;
	private BufferedOutputStream socketBufOut;
	private BufferedOutputStream fileBufOut;
	private int len=-1;
	private byte[] buf=new byte[1024];
	
	UploadServer(ServerSocket serverSocket,String destFilePath){
		this.serverSocket=serverSocket;
		this.destFilePath=destFilePath;
	}
	
	public void run(){
		try{
			fileBufOut=new BufferedOutputStream(new  FileOutputStream(destFilePath));
			socket=serverSocket.accept();
			socketBufIn=new BufferedInputStream(socket.getInputStream());
			socketBufOut=new BufferedOutputStream(socket.getOutputStream());
			System.out.println("ip: "+socket.getInetAddress().getHostAddress()+"connected!");
			while((len=socketBufIn.read(buf))!=-1){
				fileBufOut.write(buf,0,len);
				fileBufOut.flush();
			}
			socketBufOut.write("File uploaded Successfully! ".getBytes());
			socketBufOut.flush();
			//socket.shutdownInput();
		}
		catch(Exception e){
			e.printStackTrace();
		}
		finally{
			if(fileBufOut!=null)
				try{
					fileBufOut.close();
					fileBufOut=null;
				}
				catch(Exception e){
					e.printStackTrace();
				}
			if(serverSocket!=null)
				try{
					serverSocket.close();
				}
				catch(Exception e){
					e.printStackTrace();
				}
		}
	}
}

效果图：