TCP Socket Communication Model
TCP Socket Communication Model
Application examples:
TestServer.java
TestCilent.java
TestServer.java
/* Example name: simple client/server program
* Source file name: TestClient.java/TestServer.java
* Key points:
* 1. Java Socket programming steps
* 2. Socket/ServerSocket class usage
* 3. Through the Socket object, you can obtain the information of the communicating party's Socket
*/
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);
//Get the address and port of the client
dos.writeUTF("Hello," + s1.getInetAddress() +
"port#" +s1.getPort() + " bye-bye!");
dos.close();
s1.close();
}
}catch (IOException e) {
e.printStackTrace ();
System.out.println("Program run error: " + e);
}
}
}
F:\>cd java F:\java>cd socket F:\java\socket>javac TestServer.java F:\java\socket>javaTestServer
TestClient.java
/* Example name: simple client/server program
* Source file name: TestClient.java/TestServer.java
* Key points:
* 1. Java Socket programming steps
* 2. Socket/ServerSocket class usage
* 3. Through the Socket object, you can obtain the information of the communicating party's Socket
*/
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("Server connection failed!");
} catch (IOException e) {
e.printStackTrace ();
}
}
}
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>
test
TestSockServer.java
TestSockClient.java
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);
//Print the address and port of the client
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();}
}
}
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);
//Write
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();}
}
}
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
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>