编写代码,使用java ServerSocket创建服务器端ServerSocket的过程。

2024-12-02 04:57:07
推荐回答(2个)
回答1:

package socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketService {
    //搭建服务器端
    public static void main(String[] args) throws IOException{
        SocketService socketService = new SocketService();
        //1、a)创建一个服务器端Socket,即SocketService 
        socketService.oneServer();
    }
    public  void oneServer(){
        try{
            ServerSocket server=null;
            try{
                server=new ServerSocket(5209);
                //b)指定绑定的端口,并监听此端口。
                System.out.println("服务器启动成功");
                //创建一个ServerSocket在端口5209监听客户请求
            }catch(Exception e) {
                    System.out.println("没有启动监听:"+e);
                    //出错,打印出错信息
            }
            Socket socket=null;
            try{
                socket=server.accept();
                //2、调用accept()方法开始监听,等待客户端的连接 
                //使用accept()阻塞等待客户请求,有客户
                //请求到来则产生一个Socket对象,并继续执行
            }catch(Exception e) {
                System.out.println("Error."+e);
                //出错,打印出错信息
            }
            //3、获取输入流,并读取客户端信息 
            String line;
            BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //由Socket对象得到输入流,并构造相应的BufferedReader对象
            PrintWriter writer=new PrintWriter(socket.getOutputStream());
            //由Socket对象得到输出流,并构造PrintWriter对象
            BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
            //由系统标准输入设备构造BufferedReader对象
            System.out.println("Client:"+in.readLine());
            //在标准输出上打印从客户端读入的字符串
            line=br.readLine();
            //从标准输入读入一字符串
            //4、获取输出流,响应客户端的请求 
            while(!line.equals("end")){
            //如果该字符串为 "bye",则停止循环
                writer.println(line);
                //向客户端输出该字符串
                writer.flush();
                //刷新输出流,使Client马上收到该字符串
                System.out.println("Server:"+line);
                //在系统标准输出上打印读入的字符串
                System.out.println("Client:"+in.readLine());
                //从Client读入一字符串,并打印到标准输出上
                line=br.readLine();
                //从系统标准输入读入一字符串
            } //继续循环

            //5、关闭资源 
            writer.close(); //关闭Socket输出流
            in.close(); //关闭Socket输入流
            socket.close(); //关闭Socket
            server.close(); //关闭ServerSocket
        }catch(Exception e) {//出错,打印出错信息
            System.out.println("Error."+e);
        }
    }
}

回答2:

服务器端代码:

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    public void server(){
        try {
            ServerSocket serverSocket = new ServerSocket(8888); //建立服务器端的套接字,并监听8888端口

            Socket socket = serverSocket.accept(); //如果有请求到达,则接受请求,并建立一个新的套接字
            InputStream is = socket.getInputStream(); //获取此套接字上的输入流,用于接收消息

            //接下来就是获取套接字里的字节流,并转化为字符串
            byte[] bytes = new byte[1024];
            int count;
            StringBuilder sb = new StringBuilder();
            while((count = is.read(bytes)) != -1){
                sb.append(new String(bytes, 0, count));
            }

            is.close();
            System.out.println(sb.toString());

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args) {
        Server s = new Server();
        s.server();
    }

}

另附客户端:

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;

public class Client {
    public void client(){
        try {
            Socket socket = new Socket(); //建立套接字
            socket.connect(new InetSocketAddress("127.0.0.1", 8888)); //连接到指定IP地址的主机,并指定端口号接收消息

            OutputStream os = socket.getOutputStream(); //获取此连接上的输出流,用于发送数据
            os.write(new String("Hello, world!").getBytes()); //将字符串转化为字节数组写入输出流
            os.flush();//刷新此输出流,将字节流写入它们预期的目标
            os.close(); //关闭连接,否则会报连接重置异常
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Client c = new Client();
        c.client();
    }
}

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