TCP Socket通讯模型

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TCP Socket通讯模型

应用举例：

TestServer.java

TestCilent.java

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TestServer.java

class="java">/*	范例名称：简单的client/server程序
 * 	源文件名称：TestClient.java/TestServer.java
 *	要  点：
 *		1. Java Socket编程步骤
 *		2. Socket/ServerSocket类用法
 *		3. 通过Socket对象可以获取通信对方Socket的信息
 */
import java.net.*;
import java.io.*;

public class TestServer {
	public static void main(String args[]) {
		try {		
			ServerSocket s = new ServerSocket(8888);
			while (true) {
				Socket s1 = s.accept();
				OutputStream os = s1.getOutputStream();
				DataOutputStream dos = new DataOutputStream(os);
				//拿到客户端的地址和端口
				dos.writeUTF("Hello," + s1.getInetAddress() + 
						"port#" +s1.getPort() + "  bye-bye!");
				dos.close();
				s1.close();
			}
		}catch (IOException e) {
			e.printStackTrace();
			System.out.println("程序运行出错:" + e);			
		}
	}
}

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F:\>cd java

F:\java>cd socket

F:\java\socket>javac TestServer.java

F:\java\socket>java TestServer

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TestClient.java

/*	范例名称：简单的client/server程序
 * 	源文件名称：TestClient.java/TestServer.java
 *	要  点：
 *		1. Java Socket编程步骤
 *		2. Socket/ServerSocket类用法
 *		3. 通过Socket对象可以获取通信对方Socket的信息
 */

import java.net.*;
import java.io.*;

public class TestClient {
	public static void main(String args[]) {
		try {
			Socket s1 = new Socket("127.0.0.1", 8888);
			InputStream is = s1.getInputStream();
			DataInputStream dis = new DataInputStream(is);
			System.out.println(dis.readUTF());
			dis.close();
			s1.close();
		} catch (ConnectException connExc) {
			connExc.printStackTrace();
			System.err.println("服务器连接失败！");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

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F:\>cd java

F:\java>cd socket

F:\java\socket>javac TestClient.java

F:\java\socket>java TestClient
Hello,/127.0.0.1port#50883  bye-bye!

F:\java\socket>java TestClient
Hello,/127.0.0.1port#50890  bye-bye!

F:\java\socket>java TestClient
Hello,/127.0.0.1port#50892  bye-bye!

F:\java\socket>java TestClient
Hello,/127.0.0.1port#50893  bye-bye!

F:\java\socket>

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?测试

TestSockServer.java

TestSockClient.java

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TestSockServer.java

import java.io.*; 
import java.net.*;
public class TestSockServer {
  public static void main(String[] args) {
    InputStream in = null; 
    OutputStream out = null;
    try {
      ServerSocket ss = new ServerSocket(5888);
	  while(true) {
		  Socket socket = ss.accept();
		  in = socket.getInputStream(); 
		  out = socket.getOutputStream();
		  DataOutputStream dos = new DataOutputStream(out);
		  DataInputStream dis = new DataInputStream(in);
		  String s = null;
		  if((s=dis.readUTF())!=null) {
			  System.out.println(s);
			  //打印client的地址和端口
			  System.out.println("from: "+socket.getInetAddress());
			  System.out.println("Port: "+socket.getPort());
			}
		  dos.writeUTF("hi，hello"); 
		  dis.close();
		  dos.close();
		  socket.close();
	  }
    } catch (IOException e) {e.printStackTrace();}
  }
}

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TestSockClient.java

import java.net.*;
import java.io.*;
public class TestSockClient {
  public static void main(String[] args) {
    InputStream is = null; OutputStream os = null;
    try {
      Socket socket = new Socket("localhost",5888);
      is = socket.getInputStream();
      os = socket.getOutputStream();
      DataInputStream dis = new DataInputStream(is);
      DataOutputStream dos = new DataOutputStream(os);
	  //写
      dos.writeUTF("hey"); 
      String s = null;
      if((s=dis.readUTF())!=null);
      	System.out.println(s); 
      dos.close();
      dis.close();
      socket.close();
    } catch (UnknownHostException e) {
       e.printStackTrace();
    } catch (IOException e) {e.printStackTrace();}
  }
}

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F:\java\socket>javac TestSockServer.java

F:\java\socket>java TestSockServer
hey
from: /127.0.0.1
Port: 51812
hey
from: /127.0.0.1
Port: 51814
hey
from: /127.0.0.1
Port: 51815
hey
from: /127.0.0.1
Port: 51817

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F:\java\socket>javac TestSockClient.java

F:\java\socket>java TestSockClient
hi，hello

F:\java\socket>java TestSockClient
hi，hello

F:\java\socket>java TestSockClient
hi，hello

F:\java\socket>java TestSockClient
hi，hello

F:\java\socket>

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