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登錄案例

服務(wù)器端

package com.company;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    /**
     * 基于TCP協(xié)議的Socket通信导帝，實(shí)現(xiàn)用戶登錄
     * 服務(wù)器端
     * @param args
     */
    public static void main(String[] args) {
        try {
            //1客们、創(chuàng)建服務(wù)器Socket臭笆，指定端口
            ServerSocket serverSocket = new ServerSocket(8888);
            //2、使用accept監(jiān)聽互亮，等待客戶端連接，處于阻塞狀態(tài)
            System.out.println("服務(wù)端即將啟動余素，等待客戶連接豹休。。桨吊。");
            Socket acceptSocket = serverSocket.accept();

            //3威根、獲取輸入流讀取客戶端發(fā)送的信息
            InputStream inputStream = acceptSocket.getInputStream();

            BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
            String line=null;
            while ((line=br.readLine())!=null){
                System.out.println("我是服務(wù)器，客戶端說："+line);
            }
            acceptSocket.shutdownInput();

            //4视乐、響應(yīng)客戶端的請求
            OutputStream outputStream = acceptSocket.getOutputStream();
            BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(outputStream));
            bw.write("歡迎您洛搀！");
            bw.flush();
            acceptSocket.shutdownOutput();

            //5、關(guān)閉資源
            br.close();
            bw.close();
            acceptSocket.close();
            serverSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客戶端

package com.company;

import java.io.*;
import java.net.Socket;

public class Client {

    public static void main(String[] args) {
        try {
            //1炊林、創(chuàng)建客戶端socket姥卢，指定服務(wù)器地址和端口
            Socket socket = new Socket("localhost",8888);
//            Socket socket = new Socket("127.0.0.1",8888);
            //2卷要、獲取輸出流渣聚，發(fā)送信息
            OutputStream outputStream = socket.getOutputStream();

            BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(outputStream));
            bw.write("admin;123");
            bw.flush();
            socket.shutdownOutput();


            //3、獲取服務(wù)器端的信息僧叉，并響應(yīng)
            InputStream inputStream = socket.getInputStream();
            BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
            String line=null;
            while ((line=br.readLine())!=null){
                System.out.println("已收到服務(wù)器端的回復(fù)："+line);
            }
            socket.shutdownInput();


            //4奕枝、關(guān)閉資源
            bw.close();
            br.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

多線程實(shí)現(xiàn)服務(wù)器端

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修改服務(wù)端

package com.company;

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    /**
     * 基于TCP協(xié)議的Socket通信，實(shí)現(xiàn)用戶登錄
     * 服務(wù)器端
     * @param args
     */
    public static void main(String[] args) {
        try {
            //1瓶堕、創(chuàng)建服務(wù)器Socket隘道，指定端口
            ServerSocket serverSocket = new ServerSocket(8888);
            Socket acceptSocket=null;
            System.out.println("服務(wù)端即將啟動，等待客戶連接郎笆。谭梗。。");

            int count=0;

            //死循環(huán)
            while (true){
                //2宛蚓、使用accept監(jiān)聽激捏，等待客戶端連接，處于阻塞狀態(tài),
                // 阻塞時(shí)不會循環(huán)凄吏，當(dāng)有客戶端連接時(shí)循環(huán)繼續(xù)
                acceptSocket = serverSocket.accept();
                new ServerThread(acceptSocket).run();
                count++;//統(tǒng)計(jì)客戶端數(shù)量
                System.out.println("客戶端的數(shù)量為"+count);

                InetAddress address=acceptSocket.getInetAddress();
                System.out.println("當(dāng)前客戶端IP地址為："+address.getHostAddress());

            }

//            //死循環(huán)代碼無法跑到這
//            serverSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

線程

package com.company;

import java.io.*;
import java.net.Socket;

public class ServerThread extends Thread {

    //和本線程相關(guān)的Socket
    Socket mSocket = null;

    public ServerThread(Socket socket) {
        mSocket = socket;
    }

    //執(zhí)行線程远舅，響應(yīng)客戶端
    @Override
    public void run() {
        BufferedReader br = null;
        BufferedWriter bw = null;
        //3、獲取輸入流讀取客戶端發(fā)送的信息
        InputStream inputStream = null;
        try {
            inputStream = mSocket.getInputStream();


            br = new BufferedReader(new InputStreamReader(inputStream));
            String line = null;
            while ((line = br.readLine()) != null) {
                System.out.println("我是服務(wù)器痕钢，客戶端說：" + line);
            }
            mSocket.shutdownInput();

            //4图柏、響應(yīng)客戶端的請求
            OutputStream outputStream = mSocket.getOutputStream();
            bw = new BufferedWriter(new OutputStreamWriter(outputStream));
            bw.write("歡迎您！");
            bw.flush();
            mSocket.shutdownOutput();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //5任连、關(guān)閉資源
            if (br != null) {

                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (bw != null) {

                try {
                    bw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (mSocket != null) {

                try {
                    mSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}