客戶端

1、連接服務器 Socket

2、發送消息

package lesson02;import java.io.IOException;import java.io.OutputStream;import java.net.InetAddress;import java.net.Socket;/** * 客戶端 */public class TcpClientDemo1 { public static void main(String[] args) { Socket socket = null; OutputStream os = null; try { //1、要知道服務器的地址 端口號 InetAddress serverIP = InetAddress.getByName('127.0.0.1'); int port = 9999; //2、創建一個 socket 連接 socket = new Socket(serverIP, port); //3、發送消息 IO流 os = socket.getOutputStream(); os.write('你好，歡迎學習狂神學Java'.getBytes()); } catch (Exception e) { e.printStackTrace(); } finally { if (os != null){try { os.close();} catch (IOException e) { e.printStackTrace();} } if (socket != null){try { socket.close();} catch (IOException e) { e.printStackTrace();} } } }}

服務端

1、建立服務的端口 ServerSocket

2、等待用戶的連接 accept

3、接收用戶的消息

package lesson02;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.ServerSocket;import java.net.Socket;/** * 服務端 */public class TcpServerDemo1 { public static void main(String[] args) { ServerSocket serverSocket = null; Socket socket = null; InputStream is = null; ByteArrayOutputStream baos = null; try { //1、我得有一個地址 serverSocket = new ServerSocket(9999); while (true){//2、等待客戶端連接過來socket = serverSocket.accept();//3、讀取客戶端的消息is = socket.getInputStream();//管道流baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len;while((len = is.read(buffer)) != -1){ baos.write(buffer, 0 , len);}System.out.println(baos.toString()); } /* byte[] buffer = new byte[1024]; int len; while ((len = is.read(buffer)) != -1){String msg = new String(buffer, 0, len);System.out.println(msg); } */ } catch (IOException e) { e.printStackTrace(); } finally { //關閉資源 if (baos != null){try { baos.close();} catch (IOException e) { e.printStackTrace();} } if (is != null){try { is.close();} catch (IOException e) { e.printStackTrace();} } if (socket != null){try { socket.close();} catch (IOException e) { e.printStackTrace();} } if (serverSocket != null){try { serverSocket.close();} catch (IOException e) { e.printStackTrace();} } } }}

服務端

1、建立服務的端口 ServerSocket

2、等待用戶的連接 accept

3、接收用戶的消息

package lesson02;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.ServerSocket;import java.net.Socket;/** * 服務端 */public class TcpServerDemo1 { public static void main(String[] args) { ServerSocket serverSocket = null; Socket socket = null; InputStream is = null; ByteArrayOutputStream baos = null; try { //1、我得有一個地址 serverSocket = new ServerSocket(9999); while (true){//2、等待客戶端連接過來socket = serverSocket.accept();//3、讀取客戶端的消息is = socket.getInputStream();//管道流baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len;while((len = is.read(buffer)) != -1){ baos.write(buffer, 0 , len);}System.out.println(baos.toString()); } /* byte[] buffer = new byte[1024]; int len; while ((len = is.read(buffer)) != -1){String msg = new String(buffer, 0, len);System.out.println(msg); } */ } catch (IOException e) { e.printStackTrace(); } finally { //關閉資源 if (baos != null){try { baos.close();} catch (IOException e) { e.printStackTrace();} } if (is != null){try { is.close();} catch (IOException e) { e.printStackTrace();} } if (socket != null){try { socket.close();} catch (IOException e) { e.printStackTrace();} } if (serverSocket != null){try { serverSocket.close();} catch (IOException e) { e.printStackTrace();} } } }}

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