Java Socket实现客户端与服务端通信实例

Dear 丶 2022-05-23 13:53 397阅读 0赞

首先,创建一个Server.java的服务器端类

package socket;
    
    import java.io.BufferedReader;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.ServerSocket;
    import java.net.Socket;
    
    /** * Created by ljb on 2018-06-10. */ public class Server {
        public static void main(String[] args){
            BufferedReader br = null;
            PrintWriter pw = null;
            try{
                ServerSocket server = new ServerSocket(2000);
                Socket socket = server.accept();
                //获取输入流
                br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                //获取输出流
                pw = new PrintWriter(socket.getOutputStream(),true);
                //获取接收到的数据
                String s = br.readLine();
                pw.println(s);
                //打印获取到的数据
                System.out.println(s);
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                try{
                    br.close();
                    pw.close();
                }catch (Exception e){
                }
            }
        }
    }

然后创建客户端类 Client.java

package socket;
    
    import java.io.BufferedReader;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.Socket;
    
    /** * Created by ljb on 2018-06-10. */ public class Client {
        public static void main(String[] args){
            BufferedReader br = null;
            PrintWriter pw = null;
            try{
                Socket socket = new Socket("localhost",2000);
                //获取输入流与输出流
                br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                pw = new PrintWriter(socket.getOutputStream(),true);
                //向服务器发送数据
                pw.println("hello,world");
                String s = null;
                while (true){
                    s = br.readLine();
                    if(s != null){
                        break;
                    }
                }
                System.out.println(s);
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                try{
                    br.close();
                    pw.close();
                }catch (Exception e){
                }
            }
        }
    }

然后先运行服务端类Server.java,然后再运行Client.java

服务端会收到客户端传到的 hello,world 打印出来后,并转发给客户端,客户端也会打印出来

![70][]

[70]: /images/20220523/02188be4b2e948f5ac85d2e0c63dbc73.png