protected void connectServerWithTCPSocket() {  
    Socket socket; 
    try {// 創(chuàng)建一個(gè)Socket對(duì)象，并指定服務(wù)端的IP及端口號(hào) 
      socket = new Socket("...", ); 
       // 創(chuàng)建一個(gè)InputStream用戶讀取要發(fā)送的文件。 
       InputStream inputStream = new FileInputStream("e://a.txt"); 
       // 獲取Socket的OutputStream對(duì)象用于發(fā)送數(shù)據(jù)。 
       OutputStream outputStream = socket.getOutputStream(); 
       // 創(chuàng)建一個(gè)byte類型的buffer字節(jié)數(shù)組，用于存放讀取的本地文件 
       byte buffer[] = new byte[ * ]; 
       int temp = ; 
       // 循環(huán)讀取文件 
       while ((temp = inputStream.read(buffer)) != -) { 
         // 把數(shù)據(jù)寫入到OuputStream對(duì)象中 
         outputStream.write(buffer, , temp); 
       } 
       // 發(fā)送讀取的數(shù)據(jù)到服務(wù)端 
       outputStream.flush(); 
  
       /** 或創(chuàng)建一個(gè)報(bào)文，使用BufferedWriter寫入,看你的需求 **/ 
 //     String socketData = "[;fjks;]"; 
 //     BufferedWriter writer = new BufferedWriter(new OutputStreamWriter( 
 //         socket.getOutputStream())); 
 //     writer.write(socketData.replace("\n", " ") + "\n"); 
 //     writer.flush(); 
       /************************************************/ 
     } catch (UnknownHostException e) { 
       e.printStackTrace(); 
     } catch (IOException e) { 
       e.printStackTrace(); 
     } 
  
   }

public void ServerReceviedByTcp() { 
   // 聲明一個(gè)ServerSocket對(duì)象 
   ServerSocket serverSocket = null; 
   try { 
     // 創(chuàng)建一個(gè)ServerSocket對(duì)象，并讓這個(gè)Socket在端口監(jiān)聽 
     serverSocket = new ServerSocket(); 
     // 調(diào)用ServerSocket的accept()方法，接受客戶端所發(fā)送的請(qǐng)求， 
     // 如果客戶端沒有發(fā)送數(shù)據(jù)，那么該線程就停滯不繼續(xù) 
     Socket socket = serverSocket.accept(); 
     // 從Socket當(dāng)中得到InputStream對(duì)象 
     InputStream inputStream = socket.getInputStream(); 
     byte buffer[] = new byte[ * ]; 
     int temp = ; 
     // 從InputStream當(dāng)中讀取客戶端所發(fā)送的數(shù)據(jù) 
     while ((temp = inputStream.read(buffer)) != -) { 
       System.out.println(new String(buffer, , temp)); 
    } 
    serverSocket.close(); 
  } catch (IOException e) { 
     e.printStackTrace(); 
   } 
 } 

protected void connectServerWithUDPSocket() {   
   DatagramSocket socket; 
   try { 
     //創(chuàng)建DatagramSocket對(duì)象并指定一個(gè)端口號(hào)，注意，如果客戶端需要接收服務(wù)器的返回?cái)?shù)據(jù), 
     //還需要使用這個(gè)端口號(hào)來receive，所以一定要記住 
     socket = new DatagramSocket(); 
    //使用InetAddress(InetAddress).getByName把IP地址轉(zhuǎn)換為網(wǎng)絡(luò)地址  
     InetAddress serverAddress = InetAddress.getByName("..."); 
     //InetAddress serverAddress = (InetAddress) InetAddress.getByName("...");  
     String str = "[;fjks;]";//設(shè)置要發(fā)送的報(bào)文  
     byte data[] = str.getBytes();//把字符串str字符串轉(zhuǎn)換為字節(jié)數(shù)組  
     //創(chuàng)建一個(gè)DatagramPacket對(duì)象，用于發(fā)送數(shù)據(jù)。  
     //參數(shù)一：要發(fā)送的數(shù)據(jù) 參數(shù)二：數(shù)據(jù)的長度 參數(shù)三：服務(wù)端的網(wǎng)絡(luò)地址 參數(shù)四：服務(wù)器端端口號(hào)  
     DatagramPacket packet = new DatagramPacket(data, data.length ,serverAddress ,);  
     socket.send(packet);//把數(shù)據(jù)發(fā)送到服務(wù)端。  
   } catch (SocketException e) { 
     e.printStackTrace(); 
   } catch (UnknownHostException e) { 
     e.printStackTrace(); 
   } catch (IOException e) { 
     e.printStackTrace(); 
   }  
 } 

public void ReceiveServerSocketData() { 
   DatagramSocket socket; 
   try { 
     //實(shí)例化的端口號(hào)要和發(fā)送時(shí)的socket一致，否則收不到data 
     socket = new DatagramSocket(); 
     byte data[] = new byte[ * ]; 
     //參數(shù)一:要接受的data 參數(shù)二：data的長度 
     DatagramPacket packet = new DatagramPacket(data, data.length); 
     socket.receive(packet); 
     //把接收到的data轉(zhuǎn)換為String字符串 
     String result = new String(packet.getData(), packet.getOffset(), 
         packet.getLength()); 
     socket.close();//不使用了記得要關(guān)閉 
     System.out.println("the number of reveived Socket is :" + flag 
         + "udpData:" + result); 
   } catch (SocketException e) { 
     e.printStackTrace(); 
   } catch (IOException e) { 
     e.printStackTrace(); 
   } 
 } 

 public void ServerReceviedByUdp(){ 
   //創(chuàng)建一個(gè)DatagramSocket對(duì)象，并指定監(jiān)聽端口。（UDP使用DatagramSocket）  
   DatagramSocket socket; 
   try { 
    socket = new DatagramSocket(); 
     //創(chuàng)建一個(gè)byte類型的數(shù)組，用于存放接收到得數(shù)據(jù)  
     byte data[] = new byte[*];  
    //創(chuàng)建一個(gè)DatagramPacket對(duì)象，并指定DatagramPacket對(duì)象的大小  
     DatagramPacket packet = new DatagramPacket(data,data.length);  
     //讀取接收到得數(shù)據(jù)  
     socket.receive(packet);  
     //把客戶端發(fā)送的數(shù)據(jù)轉(zhuǎn)換為字符串。  
     //使用三個(gè)參數(shù)的String方法。參數(shù)一：數(shù)據(jù)包 參數(shù)二：起始位置 參數(shù)三：數(shù)據(jù)包長  
     String result = new String(packet.getData(),packet.getOffset() ,packet.getLength());  
   } catch (SocketException e) { 
     e.printStackTrace(); 
   } catch (IOException e) { 
    e.printStackTrace(); 
   }  
 }