瀏覽器和服務器如何通過Socket來連接,本文模擬Sock TCP客戶端和服務端的連接,用Java代碼實現這個簡單的功能
客戶端
import java.io.*;
import java.net.Inet4Address;
import java.net.InetSocketAddress;
import java.net.Socket;
public class Client {
public static void main(String[] args) throws IOException {
Socket socket = new Socket();
// 超時時間
socket.setSoTimeout(3000);
// 連接本地,端口2000;超時時間3000ms
socket.connect(new InetSocketAddress(Inet4Address.getLocalHost(), 2000), 3000);
System.out.println("已發起服務器連接,並進入後續流程~");
System.out.println("客戶端信息:" + socket.getLocalAddress() + " P:" + socket.getLocalPort());
System.out.println("服務器信息:" + socket.getInetAddress() + " P:" + socket.getPort());
try {
// 發送接收數據
todo(socket);
} catch (Exception e) {
System.out.println("異常關閉");
}
// 釋放資源
socket.close();
System.out.println("客戶端已退出~");
}
private static void todo(Socket client) throws IOException {
// 構建鍵盤輸入流
InputStream in = System.in;
BufferedReader input = new BufferedReader(new InputStreamReader(in));
// 得到Socket輸出流,並轉換爲打印流
OutputStream outputStream = client.getOutputStream();
PrintStream socketPrintStream = new PrintStream(outputStream);
// 得到Socket輸入流,並轉換爲BufferedReader
InputStream inputStream = client.getInputStream();
BufferedReader socketBufferedReader = new BufferedReader(new InputStreamReader(inputStream));
boolean flag = true;
do {
// 鍵盤讀取一行
String str = input.readLine();
// 發送到服務器
socketPrintStream.println(str);
// 從服務器讀取一行
String echo = socketBufferedReader.readLine();
if ("bye".equalsIgnoreCase(echo)) {
flag = false;
}else {
System.out.println(echo);
}
}while (flag);
// 資源釋放
socketPrintStream.close();
socketBufferedReader.close();
}
}
服務器
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) throws IOException {
ServerSocket server = new ServerSocket(2000);
System.out.println("服務器準備就緒~");
System.out.println("服務器信息:" + server.getInetAddress() + " P:" + server.getLocalPort());
// 等待客戶端連接
for (; ; ) {
// 得到客戶端
Socket client = server.accept();
// 客戶端構建異步線程
ClientHandler clientHandler = new ClientHandler(client);
// 啓動線程
clientHandler.start();
}
}
/**
* 客戶端消息處理
*/
private static class ClientHandler extends Thread {
private Socket socket;
private boolean flag = true;
ClientHandler(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
super.run();
System.out.println("新客戶端連接:" + socket.getInetAddress() +
" P:" + socket.getPort());
try {
// 得到打印流,用於數據輸出;服務器回送數據使用
PrintStream socketOutput = new PrintStream(socket.getOutputStream());
// 得到輸入流,用於接收數據
BufferedReader socketInput = new BufferedReader(new InputStreamReader(
socket.getInputStream()));
do {
// 客戶端拿到一條數據
String str = socketInput.readLine();
if ("bye".equalsIgnoreCase(str)) {
flag = false;
// 回送
socketOutput.println("bye");
} else {
// 打印到屏幕。並回送數據長度
System.out.println(str);
socketOutput.println("回送:" + str.length());
}
} while (flag);
socketInput.close();
socketOutput.close();
} catch (Exception e) {
System.out.println("連接異常斷開");
} finally {
// 連接關閉
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("客戶端已退出:" + socket.getInetAddress() +
" P:" + socket.getPort());
}
}
}
先啓動服務器,再啓動客戶端,看看效果