11级_Java_曹建波 9.13 Tcp实现上传文件和图片

tcp协议：

1.面向连接的

2.通过三次握手完成连接

3.可靠地协议

4.相对于udp稍慢

 

分为服务端：SeverSocket

 

和客户端：Socket

 

服务端步骤：

1.建立tcp Socket服务，必须要监听一个端口

 ServerSocket ss=new ServerSocket(port);

2.通过accptet方法，返回一个socket对象，同过这个socket与客户端的socket建立连接。

  Socket s= ss.accept();

3.通过socket获取输入输出流，进行信息通信

   写：s.getOutputStream();

   读：s.getInputStream()

4.关闭资源

 

  s.close();

  ss.close();

 

 

客户端

 

1.建立Socket客户端,ip代表要连接的目的地址和端口

 Socket s=new Socket(ip,port)

 

2.通过socket获取输入输出流与服务端通信

   写：s.getOutputStream();

   读：s.getInputStream()

 

 

3.关闭资源。

 s.close();

 

 

上传文本

 

服务端

package com.csdn.net;

 

import java.io.BufferedReader;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

 

public class UploadServer {

 

       /**

        * @param args

        * @throws IOException

        */

       publicstatic void main(String[] args) throws IOException {

              ServerSocketss=new ServerSocket(9009);

              Sockets=ss.accept();

              Stringip=s.getInetAddress().getHostAddress();

              System.out.println(ip+"……connection");

              BufferedReaderbrin =new BufferedReader(new InputStreamReader(s.getInputStream()));

              PrintWriterpw=new PrintWriter(newFileWriter("C:/Users/Yule/Desktop/server.txt"),true);

              Stringline=null;

              while((line=brin.readLine())!=null){

                     pw.println(line);

              }

              PrintWriterpwout=new PrintWriter(s.getOutputStream(),true);

              pwout.println("上传成功！！");

              pw.close();

              s.close();

              ss.close();

       }

 

}

 

客户端

 

package com.csdn.net;

 

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

import java.net.UnknownHostException;

 

public class UploadClient {

 

       /**

        * @param args

        * @throws IOException

        * @throws UnknownHostException

        */

       publicstatic void main(String[] args) throws Exception {

              Sockets=new Socket("192.168.49.186",9009);

              BufferedReaderbr=new BufferedReader(newFileReader("C:/Users/Yule/Desktop/server.txt"));

              PrintWriterpwout=new PrintWriter(s.getOutputStream(),true);

              Stringline =null;

              while((line=br.readLine())!=null){

                     pwout.println(line);

              }

              s.shutdownOutput();

              BufferedReaderbrin=new BufferedReader(new InputStreamReader(s.getInputStream()));

              Stringstr=brin.readLine();

              System.out.println(str);

              br.close();

              s.close();

       }

 

}

 

 

上传图片

 

服务端

 

package com.csdn.net;

 

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

 

 

public class ImgServer {

 

       /**

        * @param args

        */

       publicstatic void main(String[] args) throws IOException {

              ServerSocketss=new ServerSocket(9009);

              while(true){

                     Sockets=ss.accept();

                     newThread(new ImgThread(s)).start();

              }

             

              //ss.close();

       }

 

}

class ImgThread implements Runnable{

       privateSocket s;

       publicImgThread(Socket s){

              this.s=s;

       }

       @Override

       publicvoid run() {

              intcount=1;

              try{

                     Stringip=s.getInetAddress().getHostAddress();

                     System.out.println(ip+"……connection");

                     InputStreamin=s.getInputStream();

                     Filedir=new File("C:/Users/Yule/Desktop");

                     Filef=new File(dir,ip+"("+count+").jpg");

                     while(f.exists()){

                            f=newFile(dir,ip+"("+(count++)+").jpg");

                     }

                     FileOutputStreamfos=new FileOutputStream(f);

                     byte[]buf=new byte[1024];

                     intlen=0;

                     while((len=in.read(buf))!=-1){

                            fos.write(buf,0,len);

                     }

                     OutputStreamout=s.getOutputStream();

                     out.write("上传成功了".getBytes());

                     fos.close();

                     s.close();

              }catch(Exceptione){

                     e.printStackTrace();

              }

      

       }

      

}

 

 

客户端

 

package com.csdn.net;

 

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileReader;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.PrintWriter;

import java.net.Socket;

 

public class ImgClient {

 

       /**

        * @param args

        */

       publicstatic void main(String[] args) throws Exception {

//            if(args.length==0){

//                   System.out.println("请指定一个jpg文件");

//                   return;

//            }

//            Filef=new File(args[0]);

              Sockets=new Socket("192.168.49.205",9009);

              FileInputStreamfis=new FileInputStream("F:\\Picture\\壁纸\\图片\\1(1).jpg");

              OutputStreamout=s.getOutputStream();

              byte[]buf=new byte[1024];

              int len=0;

              while((len=fis.read(buf))!=-1){

                     out.write(buf,0, len);

              }

              s.shutdownOutput();

              InputStreamin=s.getInputStream();

              byte[]b=new byte[1024];

              intnum=in.read(b);

              System.out.println(newString(b,0,num));

              fis.close();

              s.close();

       }

 

}