【网络编程系列】网络编程实战

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博客目录

1.InetAddress

InetAddress常用方法如下:

publicstaticvoidmain(String[] args)throwsException{//获取本机地址信息InetAddress localIp =InetAddress.getLocalHost();
    log.info("localIp.getCanonicalHostName()="+ localIp.getCanonicalHostName());//localhost
    log.info("localIp.getHostAddress()="+ localIp.getHostAddress());//127.0.0.1
    log.info("localIp.getHostName()="+ localIp.getHostName());//qinyingjiedeMacBook-Pro.local
    log.info("localIp.toString()="+ localIp.toString());//qinyingjiedeMacBook-Pro.local/127.0.0.1
    log.info("localIp.isReachable(5000)="+ localIp.isReachable(3000));//true//获取指定域名地址信息
    log.info("====================================");InetAddress baiduIp =InetAddress.getByName("www.baidu.com");
    log.info("baiduIp.getCanonicalHostName()="+ baiduIp.getCanonicalHostName());//14.119.104.189
    log.info("baiduIp.getHostAddress()="+ baiduIp.getHostAddress());//14.119.104.189
    log.info("baiduIp.getHostName()="+ baiduIp.getHostName());//www.baidu.com
    log.info("baiduIp.toString()="+ baiduIp.toString());//www.baidu.com/14.119.104.189
    log.info("baiduIp.isReachable(5000)="+ baiduIp.isReachable(5000));//false
    log.info("====================================");//获取指定原始IP地址信息InetAddress ip =InetAddress.getByAddress(newbyte[]{127,0,0,1});
    log.info("ip.getCanonicalHostName()="+ ip.getCanonicalHostName());//localhost
    log.info("ip.getHostAddress()= "+ ip.getHostAddress());//127.0.0.1
    log.info("ip.getHostName()="+ ip.getHostName());//localhost
    log.info("ip.toString()="+ ip.toString());//localhost/127.0.0.1
    log.info("ip.isReachable(5000)="+ ip.isReachable(5000));//true}

2.socket 套接字

客户端

publicclassBasic_001_Client{publicstaticvoidmain(String[] args)throwsException{InetAddress inetAddress =InetAddress.getByName("127.0.0.1");int port =9999;Socket socket =newSocket(inetAddress, port);OutputStream outputStream = socket.getOutputStream();
        outputStream.write("你好".getBytes());
        outputStream.close();
        socket.close();}}

服务端

@Slf4jpublicclassBasic_002_Server{publicstaticvoidmain(String[] args)throwsException{ServerSocket serverSocket =newServerSocket(9999);while(true){Socket socket = serverSocket.accept();InputStream inputStream = socket.getInputStream();ByteArrayOutputStream byteArrayOutputStream =newByteArrayOutputStream();finalbyte[] buffer =newbyte[1024];int len =0;while((len = inputStream.read(buffer))!=-1){
                byteArrayOutputStream.write(buffer,0, len);}
            log.info(byteArrayOutputStream.toString());
            byteArrayOutputStream.close();
            inputStream.close();
            socket.close();}}}

3.文件上传下载

客户端

publicclassFile_001_client{publicstaticvoidmain(String[] args)throwsException{//1.创建一个socketSocket socket =newSocket(InetAddress.getByName("127.0.0.1"),9000);//2.创建一个输出流OutputStream os = socket.getOutputStream();//3.文件流finalFileInputStream fileIs =newFileInputStream("/Users/qinyingjie/Documents/idea-workspace/ant/ant-netty/src/main/java/Electron.png");//4.写出文件finalbyte[] buffer =newbyte[1024];int len =0;while((len = fileIs.read(buffer))!=-1){
            os.write(buffer,0, len);}//5.关闭资源
        fileIs.close();
        os.close();
        socket.close();}}

服务端

publicclassFile_002_server{publicstaticvoidmain(String[] args)throwsException{//1.创建服务ServerSocket serverSocket =newServerSocket(9000);//2.监听客户端连接Socket socket = serverSocket.accept();//3.获取输入流InputStream inputStream = socket.getInputStream();//4.文件输出FileOutputStream fileOut =newFileOutputStream("/Users/qinyingjie/Documents/idea-workspace/ant/ant-netty/src/main/java/receive.png");finalbyte[] buffer =newbyte[1024];int len;while((len = inputStream.read(buffer))!=-1){
            fileOut.write(buffer,0, len);}//5.关闭资源
        fileOut.close();
        inputStream.close();
        socket.close();}}

4.UDP

udp 没有客户端服务端的概念,主要是为了演示

客户端

publicclassUDP_001_client{publicstaticvoidmain(String[] args)throwsException{//1.创建一个socketDatagramSocket socket =newDatagramSocket();//2.建立一个包String msg ="你好";finalInetAddress inetAddress =InetAddress.getByName("localhost");int port =9090;DatagramPacket packet =newDatagramPacket(msg.getBytes(),0, msg.getBytes().length, inetAddress, port);//3.发送
        socket.send(packet);//4.关闭资源
        socket.close();}}

服务端

@Slf4jpublicclassUDP_002_server{publicstaticvoidmain(String[] args)throwsException{//1.创建socketDatagramSocket socket =newDatagramSocket(9090);//2.接收数据包finalbyte[] buffer =newbyte[1024];DatagramPacket packet =newDatagramPacket(buffer,0, buffer.length);
        socket.receive(packet);
        log.info(packet.getAddress().getHostAddress());
        log.info(newString(packet.getData(),0, packet.getLength()));//3.关闭资源
        socket.close();}}

5.chat

send 方

publicclassChat_001_send{publicstaticvoidmain(String[] args)throwsException{//1.创建一个socketDatagramSocket socket =newDatagramSocket(8888);//2.控制台输入finalBufferedReader reader =newBufferedReader(newInputStreamReader(System.in));while(true){finalString data = reader.readLine();finalbyte[] datas = data.getBytes();finalDatagramPacket packet =newDatagramPacket(datas,0, datas.length,newInetSocketAddress("localhost",6666));//3.发送
            socket.send(packet);if(StringUtils.equalsIgnoreCase(data,"bye")){break;}}//4.关闭资源
        socket.close();}}

receive 方

@Slf4jpublicclassChat_002_receive{publicstaticvoidmain(String[] args)throwsException{//1.创建socketDatagramSocket socket =newDatagramSocket(6666);while(true){//2.接收数据包finalbyte[] buffer =newbyte[1024];DatagramPacket packet =newDatagramPacket(buffer,0, buffer.length);
            socket.receive(packet);//断开连接 byefinalbyte[] data = packet.getData();finalString receive =newString(data,0, packet.getLength());
            log.info(receive);if(StringUtils.equalsIgnoreCase(receive,"bye")){break;}}//3.关闭资源
        socket.close();}}

6.双人交流

@Slf4jpublicclassTalkReceiveimplementsRunnable{privateDatagramSocket socket;privatefinalint port;privatefinalString msgFrom;@SneakyThrowspublicTalkReceive(int port,String msgFrom){this.port = port;this.msgFrom = msgFrom;this.socket =newDatagramSocket(port);}@SneakyThrows@Overridepublicvoidrun(){//1.创建socketwhile(true){//2.接收数据包finalbyte[] buffer =newbyte[1024];DatagramPacket packet =newDatagramPacket(buffer,0, buffer.length);
            socket.receive(packet);//断开连接 byefinalbyte[] data = packet.getData();finalString receive =newString(data,0, packet.getLength());
            log.info(msgFrom +": "+ receive);if(StringUtils.equalsIgnoreCase(receive,"bye")){break;}}//3.关闭资源
        socket.close();}}

publicclassTalkSendimplementsRunnable{DatagramSocket socket;BufferedReader reader;privatefinalint fromPort;privatefinalString toIp;privatefinalint toPort;publicTalkSend(int fromPort,String toIp,int toPort)throwsException{this.fromPort = fromPort;this.toIp = toIp;this.toPort = toPort;//1.创建一个socketthis.socket =newDatagramSocket(fromPort);//2.控制台输入this.reader =newBufferedReader(newInputStreamReader(System.in));}@SneakyThrows@Overridepublicvoidrun(){while(true){finalString data = reader.readLine();finalbyte[] datas = data.getBytes();finalDatagramPacket packet =newDatagramPacket(datas,0, datas.length,newInetSocketAddress(this.toIp,this.toPort));//3.发送
            socket.send(packet);if(StringUtils.equalsIgnoreCase(data,"bye")){break;}}//4.关闭资源
        socket.close();}}

publicclassTalkStuden{publicstaticvoidmain(String[] args)throwsException{newThread(newTalkSend(7777,"localhost",9999)).start();newThread(newTalkReceive(8888,"老师")).start();}}publicclassTalkTeacher{publicstaticvoidmain(String[] args)throwsException{newThread(newTalkSend(5555,"localhost",8888)).start();newThread(newTalkReceive(9999,"学生")).start();}}

7.URL

@Slf4jpublicclassUrlDemo{publicstaticvoidmain(String[] args)throwsException{finalURL url =newURL("http://localhost:8080/helloworld/index.jsp?username=kuangshen&password=123");
        log.info(url.getAuthority());//localhost:8080
        log.info(url.getPath());///helloworld/index.jsp
        log.info(url.getProtocol());//http
        log.info(url.getHost());//localhost
        log.info(url.getFile());///helloworld/index.jsp?username=kuangshen&password=123
        log.info(url.getUserInfo());//null
        log.info(url.getQuery());//username=kuangshen&password=123
        log.info(url.getRef());//null
        log.info(String.valueOf(url.getDefaultPort()));//80
        log.info((String) url.getContent());}}

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