完整的Socket 客户端 和 服务端实例代码
Client:
package lang.socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
public class Client {
public static final int port = 8080;
public static final String host = "localhost";
public static void main(String[] args) {
System.out.println("Client Start...");
while (true) {
Socket socket = null;
try {
// 创建一个流套接字并将其连接到指定主机上的指定端口号
socket = new Socket(host, port);
// 读取服务器端数据
BufferedReader input = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
// 向服务器端发送数据
PrintStream out = new PrintStream(socket.getOutputStream());
System.out.print("请输入: \t");
String str = new BufferedReader(
new InputStreamReader(System.in)).readLine();
out.println(str);
String ret = input.readLine();
System.out.println("服务器端返回过来的是: " + ret);
// 如接收到 "OK" 则断开连接
if ("OK".equals(ret)) {
System.out.println("客户端将关闭连接");
Thread.sleep(500);
break;
}
out.close();
input.close();
} catch (Exception e) {
System.out.println("客户端异常:" + e.getMessage());
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
socket = null;
System.out.println("客户端 finally 异常:" + e.getMessage());
}
}
}
}
}
}
Server:
package lang.socket;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static final int port = 8080;// 监听的端口号
private ServerSocket serverSocket;
public static void main(String[] args) {
System.out.println("Server...\n");
Server server = new Server();
server.init();
}
public void init() {
try {
serverSocket = new ServerSocket(port);
while (true) {
// 从请求队列中取出一个连接
Socket client = serverSocket.accept();
// 处理这次连接
new HandlerThread(client);
}
} catch (Exception e) {
System.out.println("服务器异常: " + e.getMessage());
}
}
private class HandlerThread implements Runnable {
private Socket socket;
public HandlerThread(Socket client) {
socket = client;
new Thread(this).start();
}
public void run() {
try {
// 读取客户端数据
BufferedReader input = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
String clientInputStr = input.readLine();// 这里要注意和客户端输出流的写方法对应,否则会抛
// EOFException
// 处理客户端数据
System.out.println("客户端发过来的内容:" + clientInputStr);
// 向客户端回复信息
PrintStream out = new PrintStream(socket.getOutputStream());
System.out.print("请输入:\t");
// 发送键盘输入的一行
String s = new BufferedReader(new InputStreamReader(System.in))
.readLine();
out.println(s);
out.close();
input.close();
} catch (Exception e) {
System.out.println("服务器 run 异常: " + e.getMessage());
} finally {
if (socket != null) {
try {
socket.close();
} catch (Exception e) {
socket = null;
System.out.println("服务端 finally 异常:" + e.getMessage());
}
}
}
}
}
}