\n| \n \u5e94\u7528\u573a\u666f<\/p>\n<\/td>\n | \n \u7f51\u9875\u3001\u6587\u4ef6\u4f20\u8f93\u3001\u90ae\u4ef6\u7b49\u9700\u53ef\u9760\u7684\u573a\u666f<\/p>\n<\/td>\n | \n \u76f4\u64ad\u3001\u6e38\u620f\u3001\u89c6\u9891\u4f1a\u8bae\u7b49\u5b9e\u65f6\u6027\u4f18\u5148\u573a\u666f<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u9762\u8bd5\u5e38\u8003：TCP\u548cUDP\u7684\u533a\u522b\u662f\u540e\u7aef\u9762\u8bd5\u9ad8\u9891\u9898，\u4e00\u5b9a\u8981\u8bb0\u7262！<\/p>\n \u4e09\u3001UDP\u6570\u636e\u62a5\u5957\u63a5\u5b57\u7f16\u7a0b<\/h2>\n3.1 UDP\u901a\u4fe1\u6a21\u578b<\/h3>\nUDP\u662f\u65e0\u8fde\u63a5\u3001\u9762\u5411\u6570\u636e\u62a5\u7684\u534f\u8bae，\u610f\u601d\u5c31\u662f\u6bcf\u6b21\u53d1\u6570\u636e\u90fd\u4e0d\u7528\u5efa\u7acb\u8fde\u63a5，\u4e00\u6b21\u628a\u6574\u4e2a\u6570\u636e\u62a5\u53d1\u51fa\u53bb，\u63a5\u6536\u7aef\u4e5f\u5fc5\u987b\u4e00\u6b21\u6536\u5b8c\u3002<\/p>\n Java\u4e2d\u4f7f\u7528UDP\u534f\u8bae\u901a\u4fe1，\u4e3b\u8981\u57fa\u4e8e\u4e24\u4e2a\u7c7b：<\/p>\n \n- \n
DatagramSocket：\u6570\u636e\u62a5\u5957\u63a5\u5b57，\u7528\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e<\/p>\n<\/li>\n - \n
DatagramPacket：\u6570\u636e\u62a5\u5305，\u5c31\u662f\u5177\u4f53\u8981\u53d1\u9001\u6216\u63a5\u6536\u7684\u6570\u636e<\/p>\n<\/li>\n<\/ul>\n \u4e00\u6b21\u5b8c\u6574\u7684UDP\u8bf7\u6c42-\u54cd\u5e94\u6d41\u7a0b\u662f\u8fd9\u6837\u7684：<\/p>\n - \n
\u63a5\u6536\u7aef\u5148\u521b\u5efaDatagramSocket，\u7ed1\u5b9a\u7aef\u53e3，\u8c03\u7528receive()\u65b9\u6cd5\u963b\u585e\u7b49\u5f85\u6570\u636e<\/p>\n<\/li>\n - \n
\u53d1\u9001\u7aef\u521b\u5efaDatagramSocket，\u6784\u9020DatagramPacket（\u5305\u542b\u6570\u636e+\u76ee\u6807IP\u548c\u7aef\u53e3），\u8c03\u7528send()\u53d1\u9001<\/p>\n<\/li>\n - \n
\u63a5\u6536\u7aef\u6536\u5230\u6570\u636e，receive()\u65b9\u6cd5\u8fd4\u56de，\u4eceDatagramPacket\u4e2d\u53d6\u51fa\u6570\u636e<\/p>\n<\/li>\n - \n
\u63a5\u6536\u7aef\u5904\u7406\u4e1a\u52a1，\u6784\u9020\u54cd\u5e94\u7684DatagramPacket，send()\u53d1\u56de\u7ed9\u53d1\u9001\u7aef<\/p>\n<\/li>\n - \n
\u53d1\u9001\u7aef\u8c03\u7528receive()\u7b49\u5f85\u54cd\u5e94，\u6536\u5230\u540e\u5904\u7406<\/p>\n<\/li>\n 3.2 \u6838\u5fc3API\u4ecb\u7ecd<\/h3>\nDatagramSocket<\/h4>\nDatagramSocket\u5c31\u662fUDP\u7684Socket，\u7528\u4e8e\u53d1\u9001\u548c\u63a5\u6536UDP\u6570\u636e\u62a5\u3002<\/p>\n \u6784\u9020\u65b9\u6cd5：<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n DatagramSocket()<\/p>\n<\/td>\n | \n \u521b\u5efaUDP\u5957\u63a5\u5b57，\u7ed1\u5b9a\u672c\u673a\u968f\u673a\u7aef\u53e3（\u4e00\u822c\u5ba2\u6237\u7aef\u7528）<\/p>\n<\/td>\n<\/tr>\n | \n| \n DatagramSocket(int port)<\/p>\n<\/td>\n | \n \u521b\u5efaUDP\u5957\u63a5\u5b57，\u7ed1\u5b9a\u6307\u5b9a\u7aef\u53e3（\u4e00\u822c\u670d\u52a1\u7aef\u7528）<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u5e38\u7528\u65b9\u6cd5：<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n void receive(DatagramPacket p)<\/p>\n<\/td>\n | \n \u63a5\u6536\u6570\u636e\u62a5，\u6ca1\u6570\u636e\u5c31\u963b\u585e\u7b49\u5f85<\/p>\n<\/td>\n<\/tr>\n | \n| \n void send(DatagramPacket p)<\/p>\n<\/td>\n | \n \u53d1\u9001\u6570\u636e\u62a5，\u76f4\u63a5\u53d1\u4e0d\u963b\u585e<\/p>\n<\/td>\n<\/tr>\n | \n| \n void close()<\/p>\n<\/td>\n | \n \u5173\u95ed\u5957\u63a5\u5b57，\u91ca\u653e\u8d44\u6e90<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n DatagramPacket<\/h4>\nDatagramPacket\u5c31\u662fUDP\u53d1\u9001\u548c\u63a5\u6536\u7684\u6570\u636e\u62a5\u5305\u3002<\/p>\n \u6784\u9020\u65b9\u6cd5：<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n DatagramPacket(byte[] buf, int length)<\/p>\n<\/td>\n | \n \u6784\u9020\u63a5\u6536\u7528\u7684\u6570\u636e\u62a5，\u6570\u636e\u5b58buf\u91cc，\u6307\u5b9a\u63a5\u6536\u957f\u5ea6<\/p>\n<\/td>\n<\/tr>\n | \n| \n DatagramPacket(byte[] buf, int offset, int length, SocketAddress address)<\/p>\n<\/td>\n | \n \u6784\u9020\u53d1\u9001\u7528\u7684\u6570\u636e\u62a5，\u6307\u5b9a\u6570\u636e+\u76ee\u6807\u5730\u5740<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u5e38\u7528\u65b9\u6cd5：<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n InetAddress getAddress()<\/p>\n<\/td>\n | \n \u83b7\u53d6\u5bf9\u65b9\u7684IP\u5730\u5740<\/p>\n<\/td>\n<\/tr>\n | \n| \n int getPort()<\/p>\n<\/td>\n | \n \u83b7\u53d6\u5bf9\u65b9\u7684\u7aef\u53e3\u53f7<\/p>\n<\/td>\n<\/tr>\n | \n| \n byte[] getData()<\/p>\n<\/td>\n | \n \u83b7\u53d6\u6570\u636e\u62a5\u4e2d\u7684\u6570\u636e<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 3.3 \u5b9e\u6218\u4e00：Echo\u56de\u663e\u670d\u52a1\u5668<\/h3>\n\u6211\u4eec\u5148\u6765\u5199\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u56de\u663e\u670d\u52a1\u5668：\u5ba2\u6237\u7aef\u53d1\u4ec0\u4e48，\u670d\u52a1\u5668\u5c31\u539f\u6837\u8fd4\u56de\u4ec0\u4e48\u3002\u8fd9\u662f\u7f51\u7edc\u7f16\u7a0b\u7684"Hello World"\u3002<\/p>\n UDP Echo \u670d\u52a1\u7aef<\/h4>\n\u670d\u52a1\u5668\u7684\u6838\u5fc3\u903b\u8f91\u5c31\u662f\u4e09\u6b65\u8d70：<\/p>\n - \n
\u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790：receive()\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e\u62a5<\/p>\n<\/li>\n - \n
\u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94：\u56de\u663e\u670d\u52a1\u5c31\u662f\u8bf7\u6c42\u7b49\u4e8e\u54cd\u5e94<\/p>\n<\/li>\n - \n
\u628a\u54cd\u5e94\u5199\u56de\u5ba2\u6237\u7aef：\u6784\u9020\u54cd\u5e94\u6570\u636e\u62a5，send()\u53d1\u56de<\/p>\n<\/li>\n import java.io.IOException;
\nimport java.net.DatagramPacket;
\nimport java.net.DatagramSocket;
\nimport java.net.SocketException;<\/p>\n public class UdpEchoServer {
\n private DatagramSocket socket = null;<\/p>\n \/\/ \u53c2\u6570\u662f\u670d\u52a1\u5668\u8981\u7ed1\u5b9a\u7684\u7aef\u53e3
\n public UdpEchoServer(int port) throws SocketException {
\n socket = new DatagramSocket(port);
\n }<\/p>\n \/\/ \u542f\u52a8\u670d\u52a1\u5668
\n public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8!");
\n while (true) {
\n \/\/ \u53cd\u590d\u6267\u884c\u9488\u5bf9\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u5904\u7406\u903b\u8f91
\n \/\/ 1. \u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790
\n DatagramPacket requestPacket = new DatagramPacket(new byte[4096], 4096);
\n socket.receive(requestPacket);
\n \/\/ \u8f6c\u6210\u5b57\u7b26\u4e32，\u7ea6\u5b9a\u5ba2\u6237\u7aef\u53d1\u7684\u662f\u6587\u672c
\n String request = new String(requestPacket.getData(), 0, requestPacket.getLength());<\/p>\n \/\/ 2. \u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94
\n String response = process(request);<\/p>\n \/\/ 3. \u628a\u54cd\u5e94\u5199\u56de\u7ed9\u5ba2\u6237\u7aef
\n DatagramPacket responsePacket = new DatagramPacket(response.getBytes(),
\n response.getBytes().length,
\n requestPacket.getSocketAddress());
\n socket.send(responsePacket);<\/p>\n \/\/ \u6253\u5370\u65e5\u5fd7，\u65b9\u4fbf\u89c2\u5bdf
\n System.out.printf("[%s:%d] req: %s, resp: %s\\\\n",
\n requestPacket.getAddress().toString(),
\n requestPacket.getPort(),
\n request, response);
\n }
\n }<\/p>\n \/\/ \u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94，\u56de\u663e\u5c31\u662f\u539f\u6837\u8fd4\u56de
\n public String process(String request) {
\n return request;
\n }<\/p>\n public static void main(String[] args) throws IOException {
\n UdpEchoServer server = new UdpEchoServer(9090);
\n server.start();
\n }
\n}<\/p>\n UDP Echo \u5ba2\u6237\u7aef<\/h4>\n\u5ba2\u6237\u7aef\u7684\u903b\u8f91\u4e5f\u662f\u56db\u6b65\u8d70：<\/p>\n - \n
\u4ece\u63a7\u5236\u53f0\u8bfb\u53d6\u7528\u6237\u8f93\u5165<\/p>\n<\/li>\n - \n
\u6784\u9020\u8bf7\u6c42\u5bf9\u8c61，\u53d1\u7ed9\u670d\u52a1\u5668<\/p>\n<\/li>\n - \n
\u8bfb\u53d6\u670d\u52a1\u5668\u7684\u54cd\u5e94<\/p>\n<\/li>\n - \n
\u663e\u793a\u5230\u5c4f\u5e55\u4e0a<\/p>\n<\/li>\n import java.io.IOException;
\nimport java.net.*;
\nimport java.util.Scanner;<\/p>\n public class UdpEchoClient {
\n private DatagramSocket socket = null;
\n private String serverIp;
\n private int serverPort;<\/p>\n public UdpEchoClient(String ip, int port) throws SocketException {
\n serverIp = ip;
\n serverPort = port;
\n \/\/ \u5ba2\u6237\u7aef\u4e0d\u6307\u5b9a\u7aef\u53e3，\u7cfb\u7edf\u81ea\u52a8\u5206\u914d\u7a7a\u95f2\u7aef\u53e3
\n socket = new DatagramSocket();
\n }<\/p>\n public void start() throws IOException {
\n Scanner scanner = new Scanner(System.in);
\n System.out.println("\u5ba2\u6237\u7aef\u542f\u52a8!");
\n while (true) {
\n \/\/ 1. \u4ece\u63a7\u5236\u53f0\u8bfb\u53d6\u7528\u6237\u8f93\u5165
\n System.out.print("-> ");
\n String request = scanner.next();<\/p>\n \/\/ 2. \u6784\u9020\u8bf7\u6c42\u5bf9\u8c61，\u53d1\u7ed9\u670d\u52a1\u5668
\n DatagramPacket requestPacket = new DatagramPacket(request.getBytes(),
\n request.getBytes().length,
\n InetAddress.getByName(serverIp), serverPort);
\n socket.send(requestPacket);<\/p>\n \/\/ 3. \u8bfb\u53d6\u670d\u52a1\u5668\u54cd\u5e94
\n DatagramPacket responsePacket = new DatagramPacket(new byte[4096], 4096);
\n socket.receive(responsePacket);
\n String response = new String(responsePacket.getData(), 0, responsePacket.getLength());<\/p>\n \/\/ 4. \u663e\u793a\u5230\u5c4f\u5e55
\n System.out.println(response);
\n }
\n }<\/p>\n public static void main(String[] args) throws IOException {
\n UdpEchoClient client = new UdpEchoClient("127.0.0.1", 9090);
\n client.start();
\n }
\n}<\/p>\n \u8fd0\u884c\u65b9\u5f0f：\u5148\u542f\u52a8\u670d\u52a1\u7aef，\u518d\u542f\u52a8\u5ba2\u6237\u7aef，\u5728\u5ba2\u6237\u7aef\u63a7\u5236\u53f0\u8f93\u5165\u6587\u5b57，\u56de\u8f66\u5c31\u80fd\u770b\u5230\u670d\u52a1\u5668\u56de\u663e\u56de\u6765\u7684\u5185\u5bb9\u3002\u6ce8\u610f127.0.0.1\u662f\u672c\u673a\u56de\u73af\u5730\u5740，\u672c\u5730\u8c03\u8bd5\u7528\u3002<\/p>\n 3.4 \u5b9e\u6218\u4e8c：\u82f1\u8bd1\u6c49\u8bcd\u5178\u670d\u52a1\u5668<\/h3>\n\u5b66\u4f1a\u4e86\u56de\u663e\u670d\u52a1\u5668，\u6211\u4eec\u6765\u5347\u7ea7\u4e00\u4e0b，\u505a\u4e00\u4e2a\u82f1\u8bd1\u6c49\u8bcd\u5178\u670d\u52a1\u5668\u3002\u5ba2\u6237\u7aef\u8f93\u5165\u82f1\u6587\u5355\u8bcd，\u670d\u52a1\u5668\u8fd4\u56de\u5bf9\u5e94\u7684\u4e2d\u6587\u7ffb\u8bd1\u3002<\/p>\n \u8fd9\u91cc\u6211\u4eec\u7528\u7ee7\u627f\u7684\u65b9\u5f0f，\u76f4\u63a5\u590d\u7528UdpEchoServer\u7684\u4ee3\u7801，\u53ea\u9700\u8981\u91cd\u5199process\u65b9\u6cd5\u5c31\u884c，\u975e\u5e38\u65b9\u4fbf！<\/p>\n import java.net.SocketException;
\nimport java.util.HashMap;
\nimport java.util.Map;<\/p>\n public class UdpDictServer extends UdpEchoServer {
\n private Map<String, String> dict = new HashMap<>();<\/p>\n public UdpDictServer(int port) throws SocketException {
\n super(port);
\n \/\/ \u521d\u59cb\u5316\u8bcd\u5178，\u8fd9\u91cc\u7b80\u5355\u653e\u51e0\u4e2a\u5355\u8bcd
\n dict.put("cat", "\u5c0f\u732b");
\n dict.put("dog", "\u5c0f\u72d7");
\n dict.put("hello", "\u4f60\u597d");
\n dict.put("world", "\u4e16\u754c");
\n dict.put("java", "\u722a\u54c7\u7f16\u7a0b\u8bed\u8a00");
\n \/\/ \u53ef\u4ee5\u7ee7\u7eed\u52a0\u5343\u5343\u4e07\u4e07\u4e2a\u5355\u8bcd…
\n }<\/p>\n \/\/ \u91cd\u5199process\u65b9\u6cd5，\u5b9e\u73b0\u67e5\u8bcd\u5178\u7684\u903b\u8f91
\n @Override
\n public String process(String request) {
\n \/\/ \u67e5\u5230\u5c31\u8fd4\u56de\u7ffb\u8bd1，\u67e5\u4e0d\u5230\u8fd4\u56de\u63d0\u793a
\n return dict.getOrDefault(request, "\u8be5\u8bcd\u6ca1\u6709\u67e5\u8be2\u5230!");
\n }<\/p>\n public static void main(String[] args) throws Exception {
\n UdpDictServer server = new UdpDictServer(9090);
\n server.start();
\n }
\n} <\/p>\n \u5ba2\u6237\u7aef\u4e0d\u7528\u6539，\u76f4\u63a5\u7528\u4e4b\u524d\u7684UdpEchoClient\u5c31\u884c，\u8f93\u5165\u82f1\u6587\u5355\u8bcd\u5c31\u80fd\u62ff\u5230\u7ffb\u8bd1\u4e86\u3002<\/p>\n \u8bbe\u8ba1\u601d\u60f3：\u4f60\u770b，\u901a\u8fc7\u7ee7\u627f+\u91cd\u5199，\u6211\u4eec\u628a\u7f51\u7edc\u901a\u4fe1\u7684\u901a\u7528\u903b\u8f91\u548c\u4e1a\u52a1\u903b\u8f91\u5206\u5f00\u4e86\u3002\u4ee5\u540e\u4e0d\u7ba1\u505a\u4ec0\u4e48\u4e1a\u52a1，\u53ea\u8981\u91cd\u5199process\u65b9\u6cd5\u5c31\u884c，\u7f51\u7edc\u90e8\u5206\u5b8c\u5168\u4e0d\u7528\u52a8\u3002\u8fd9\u5c31\u662f\u4ee3\u7801\u590d\u7528\u7684\u9b45\u529b！<\/p>\n \u56db\u3001TCP\u6d41\u5957\u63a5\u5b57\u7f16\u7a0b<\/h2>\n4.1 TCP\u901a\u4fe1\u6a21\u578b<\/h3>\nTCP\u662f\u6709\u8fde\u63a5\u3001\u9762\u5411\u5b57\u8282\u6d41\u7684\u534f\u8bae\u3002\u548cUDP\u4e0d\u540c，TCP\u901a\u4fe1\u524d\u5fc5\u987b\u5148\u5efa\u7acb\u8fde\u63a5，\u5c31\u50cf\u6253\u7535\u8bdd\u5148\u62e8\u53f7\u63a5\u901a\u4e86\u624d\u80fd\u8bf4\u8bdd\u3002<\/p>\n Java\u4e2dTCP\u901a\u4fe1\u4e3b\u8981\u7528\u4e24\u4e2a\u7c7b：<\/p>\n \n- \n
ServerSocket：\u670d\u52a1\u7aef\u7528\u7684，\u8d1f\u8d23\u76d1\u542c\u7aef\u53e3，\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5<\/p>\n<\/li>\n - \n
Socket：\u53cc\u65b9\u5efa\u7acb\u8fde\u63a5\u540e，\u7528Socket\u6765\u6536\u53d1\u6570\u636e，\u901a\u8fc7\u8f93\u5165\u8f93\u51fa\u6d41\u64cd\u4f5c<\/p>\n<\/li>\n<\/ul>\n TCP\u901a\u4fe1\u7684\u57fa\u672c\u6d41\u7a0b：<\/p>\n - \n
\u670d\u52a1\u7aef\u521b\u5efaServerSocket，\u7ed1\u5b9a\u7aef\u53e3，\u8c03\u7528accept()\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5<\/p>\n<\/li>\n - \n
\u5ba2\u6237\u7aef\u521b\u5efaSocket，\u6307\u5b9a\u670d\u52a1\u7aefIP\u548c\u7aef\u53e3，\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42<\/p>\n<\/li>\n - \n
\u8fde\u63a5\u5efa\u7acb\u6210\u529f\u540e，\u670d\u52a1\u7aefaccept()\u8fd4\u56de\u4e00\u4e2aSocket\u5bf9\u8c61<\/p>\n<\/li>\n - \n
\u53cc\u65b9\u901a\u8fc7Socket\u83b7\u53d6InputStream\u548cOutputStream，\u50cf\u8bfb\u5199\u6587\u4ef6\u4e00\u6837\u6536\u53d1\u6570\u636e<\/p>\n<\/li>\n - \n
\u901a\u4fe1\u7ed3\u675f，\u5173\u95edSocket\u91ca\u653e\u8d44\u6e90<\/p>\n<\/li>\n 4.2 \u6838\u5fc3API\u4ecb\u7ecd<\/h3>\nServerSocket<\/h4>\nServerSocket\u662f\u521b\u5efaTCP\u670d\u52a1\u7aefSocket\u7684API\u3002<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n ServerSocket(int port)<\/p>\n<\/td>\n | \n \u521b\u5efa\u670d\u52a1\u7aefSocket，\u7ed1\u5b9a\u6307\u5b9a\u7aef\u53e3<\/p>\n<\/td>\n<\/tr>\n | \n| \n Socket accept()<\/p>\n<\/td>\n | \n \u76d1\u542c\u7aef\u53e3，\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u5c31\u8fd4\u56deSocket，\u5426\u5219\u963b\u585e\u7b49\u5f85<\/p>\n<\/td>\n<\/tr>\n | \n| \n void close()<\/p>\n<\/td>\n | \n \u5173\u95ed\u5957\u63a5\u5b57<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Socket<\/h4>\nSocket\u5c31\u662f\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u5efa\u7acb\u8fde\u63a5\u540e，\u7528\u6765\u6536\u53d1\u6570\u636e\u7684\u5bf9\u8c61\u3002\u4e0d\u7ba1\u5ba2\u6237\u7aef\u8fd8\u662f\u670d\u52a1\u7aef，\u8fde\u63a5\u5efa\u7acb\u540e\u90fd\u7528Socket\u6765\u901a\u4fe1\u3002<\/p>\n \n\n\u65b9\u6cd5\u7b7e\u540d<\/p>\n \u8bf4\u660e<\/p>\n<\/tr>\n \n\n| \n Socket(String host, int port)<\/p>\n<\/td>\n | \n \u521b\u5efa\u5ba2\u6237\u7aefSocket，\u8fde\u63a5\u6307\u5b9a\u4e3b\u673a\u7684\u6307\u5b9a\u7aef\u53e3<\/p>\n<\/td>\n<\/tr>\n | \n| \n InetAddress getInetAddress()<\/p>\n<\/td>\n | \n \u8fd4\u56de\u8fde\u63a5\u7684\u5bf9\u7aef\u5730\u5740<\/p>\n<\/td>\n<\/tr>\n | \n| \n InputStream getInputStream()<\/p>\n<\/td>\n | \n \u83b7\u53d6\u8f93\u5165\u6d41，\u7528\u6765\u8bfb\u6570\u636e<\/p>\n<\/td>\n<\/tr>\n | \n| \n OutputStream getOutputStream()<\/p>\n<\/td>\n | \n \u83b7\u53d6\u8f93\u51fa\u6d41，\u7528\u6765\u5199\u6570\u636e<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6ce8\u610f：TCP\u662f\u9762\u5411\u5b57\u8282\u6d41\u7684，\u6240\u4ee5\u6211\u4eec\u662f\u901a\u8fc7InputStream\u548cOutputStream\u6765\u8bfb\u5199\u6570\u636e，\u5c31\u548c\u64cd\u4f5c\u672c\u5730\u6587\u4ef6\u7684\u6d41\u4e00\u6a21\u4e00\u6837，\u975e\u5e38\u597d\u4e0a\u624b！<\/p>\n 4.3 \u5b9e\u6218：Echo\u56de\u663e\u670d\u52a1\u5668<\/h3>\n\u6211\u4eec\u540c\u6837\u6765\u5199\u4e00\u4e2aTCP\u7248\u672c\u7684Echo\u56de\u663e\u670d\u52a1\u5668，\u5bf9\u6bd4\u4e00\u4e0b\u548cUDP\u7248\u672c\u6709\u4ec0\u4e48\u4e0d\u540c\u3002<\/p>\n TCP Echo \u670d\u52a1\u7aef<\/h4>\n\u670d\u52a1\u7aef\u7684\u601d\u8def：<\/p>\n - \n
\u521b\u5efaServerSocket\u7ed1\u5b9a\u7aef\u53e3<\/p>\n<\/li>\n - \n
\u8c03\u7528accept()\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5<\/p>\n<\/li>\n - \n
\u8fde\u63a5\u5efa\u7acb\u540e，\u901a\u8fc7Socket\u83b7\u53d6\u8f93\u5165\u8f93\u51fa\u6d41<\/p>\n<\/li>\n - \n
\u5faa\u73af\u8bfb\u53d6\u8bf7\u6c42\u3001\u8ba1\u7b97\u54cd\u5e94\u3001\u8fd4\u56de\u54cd\u5e94<\/p>\n<\/li>\n - \n
\u5ba2\u6237\u7aef\u65ad\u5f00\u540e，\u5173\u95edSocket<\/p>\n<\/li>\n import java.io.*;
\nimport java.net.ServerSocket;
\nimport java.net.Socket;<\/p>\n public class TcpEchoServer {
\n private ServerSocket serverSocket = null;<\/p>\n \/\/ \u7ed1\u5b9a\u7aef\u53e3\u53f7
\n public TcpEchoServer(int port) throws IOException {
\n serverSocket = new ServerSocket(port);
\n }<\/p>\n \/\/ \u542f\u52a8\u670d\u52a1\u5668
\n public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8!");
\n while (true) {
\n \/\/ \u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5
\n Socket clientSocket = serverSocket.accept();
\n processConnection(clientSocket);
\n }
\n }<\/p>\n \/\/ \u5904\u7406\u4e00\u4e2a\u8fde\u63a5\u7684\u903b\u8f91
\n private void processConnection(Socket clientSocket) {
\n System.out.printf("[%s:%d] \u5ba2\u6237\u7aef\u4e0a\u7ebf!\\\\n",
\n clientSocket.getInetAddress().toString(),
\n clientSocket.getPort());<\/p>\n \/\/ \u83b7\u53d6\u8f93\u5165\u8f93\u51fa\u6d41
\n try (InputStream inputStream = clientSocket.getInputStream();
\n OutputStream outputStream = clientSocket.getOutputStream()) {<\/p>\n \/\/ \u4e00\u6b21\u8fde\u63a5\u4e2d\u53ef\u80fd\u6709\u591a\u6b21\u8bf7\u6c42\u54cd\u5e94
\n while (true) {
\n \/\/ 1. \u8bfb\u53d6\u8bf7\u6c42，\u7528Scanner\u65b9\u4fbf\u8bfb\u53d6\u6587\u672c
\n Scanner scanner = new Scanner(inputStream);
\n if (!scanner.hasNext()) {
\n \/\/ \u8bfb\u53d6\u5b8c\u6bd5，\u5ba2\u6237\u7aef\u4e0b\u7ebf
\n System.out.printf("[%s:%d] \u5ba2\u6237\u7aef\u4e0b\u7ebf!\\\\n",
\n clientSocket.getInetAddress().toString(),
\n clientSocket.getPort());
\n break;
\n }
\n String request = scanner.next();<\/p>\n \/\/ 2. \u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94
\n String response = process(request);<\/p>\n \/\/ 3. \u628a\u54cd\u5e94\u5199\u56de\u5ba2\u6237\u7aef，\u7528PrintWriter\u65b9\u4fbf\u5199\u6587\u672c
\n PrintWriter writer = new PrintWriter(outputStream);
\n \/\/ \u7528println\u5e26\u4e0a\u6362\u884c，\u65b9\u4fbf\u5ba2\u6237\u7aefscanner\u8bfb\u53d6
\n writer.println(response);
\n writer.flush(); \/\/ \u5237\u65b0\u7f13\u51b2\u533a，\u786e\u4fdd\u6570\u636e\u771f\u7684\u53d1\u51fa\u53bb<\/p>\n \/\/ \u6253\u5370\u65e5\u5fd7
\n System.out.printf("[%s:%d] req: %s, resp: %s\\\\n",
\n clientSocket.getInetAddress().toString(),
\n clientSocket.getPort(),
\n request, response);
\n }
\n } catch (IOException e) {
\n e.printStackTrace();
\n } finally {
\n \/\/ \u786e\u4fdd\u5173\u95edsocket\u91ca\u653e\u8d44\u6e90
\n try {
\n clientSocket.close();
\n } catch (IOException e) {
\n e.printStackTrace();
\n }
\n }
\n }<\/p>\n public String process(String request) {
\n return request;
\n }<\/p>\n public static void main(String[] args) throws IOException {
\n TcpEchoServer server = new TcpEchoServer(9090);
\n server.start();
\n }
\n}<\/p>\n TCP Echo \u5ba2\u6237\u7aef<\/h4>\nimport java.io.*;
\nimport java.net.Socket;
\nimport java.util.Scanner;<\/p>\n public class TcpEchoClient {
\n private Socket socket = null;<\/p>\n \/\/ \u521b\u5efaSocket\u65f6\u5c31\u4f1a\u5efa\u7acbTCP\u8fde\u63a5
\n public TcpEchoClient(String serverIp, int serverPort) throws IOException {
\n socket = new Socket(serverIp, serverPort);
\n }<\/p>\n public void start() {
\n System.out.println("\u5ba2\u6237\u7aef\u542f\u52a8");
\n Scanner scannerConsole = new Scanner(System.in);<\/p>\n try (InputStream inputStream = socket.getInputStream();
\n OutputStream outputStream = socket.getOutputStream()) {<\/p>\n while (true) {
\n \/\/ 1. \u4ece\u63a7\u5236\u53f0\u8f93\u5165
\n System.out.print("-> ");
\n String request = scannerConsole.next();<\/p>\n \/\/ 2. \u628a\u8bf7\u6c42\u53d1\u7ed9\u670d\u52a1\u5668
\n PrintWriter printWriter = new PrintWriter(outputStream);
\n printWriter.println(request);
\n printWriter.flush(); \/\/ \u522b\u5fd8\u4e86flush！<\/p>\n \/\/ 3. \u8bfb\u53d6\u670d\u52a1\u5668\u54cd\u5e94
\n Scanner scannerNetwork = new Scanner(inputStream);
\n String response = scannerNetwork.next();<\/p>\n \/\/ 4. \u6253\u5370\u7ed3\u679c
\n System.out.println(response);
\n }
\n } catch (IOException e) {
\n e.printStackTrace();
\n }
\n }<\/p>\n public static void main(String[] args) throws IOException {
\n TcpEchoClient client = new TcpEchoClient("127.0.0.1", 9090);
\n client.start();
\n }
\n} <\/p>\n \u6ce8\u610f\u4e24\u4e2a\u5751：<\/p>\n 1. \u4e00\u5b9a\u8981\u7528println\u800c\u4e0d\u662fprint，\u672b\u5c3e\u5e26\u6362\u884c，\u8fd9\u6837\u5bf9\u65b9\u7684scanner.next()\u624d\u80fd\u6b63\u786e\u8bfb\u53d6<\/p>\n 2. \u5199\u5b8c\u4e00\u5b9a\u8981flush()！\u8f93\u51fa\u6d41\u6709\u7f13\u51b2\u533a，\u4e0d\u5237\u65b0\u6570\u636e\u53ef\u80fd\u8fd8\u5728\u7f13\u51b2\u533a\u91cc\u6ca1\u53d1\u51fa\u53bb<\/p>\n \u4e94\u3001\u670d\u52a1\u5668\u6027\u80fd\u4f18\u5316<\/h2>\n5.1 \u4e3a\u4ec0\u4e48\u9700\u8981\u591a\u7ebf\u7a0b？<\/h3>\n\u521a\u624d\u5199\u7684TCP\u670d\u52a1\u5668\u6709\u4e2a\u5927\u95ee\u9898：\u5355\u7ebf\u7a0b\u7684，\u4e00\u6b21\u53ea\u80fd\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/p>\n \u56e0\u4e3aaccept()\u63a5\u6536\u5230\u4e00\u4e2a\u8fde\u63a5\u540e，\u5c31\u8fdb\u5165processConnection()\u65b9\u6cd5\u5faa\u73af\u5904\u7406\u8fd9\u4e2a\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u4e86\u3002\u5728\u8fd9\u4e2a\u5ba2\u6237\u7aef\u65ad\u5f00\u4e4b\u524d，accept()\u4e0d\u4f1a\u518d\u88ab\u8c03\u7528，\u65b0\u7684\u5ba2\u6237\u7aef\u5c31\u8fde\u4e0d\u4e0a\u4e86\u3002<\/p>\n \u8fd9\u80af\u5b9a\u4e0d\u884c，\u771f\u5b9e\u7684\u670d\u52a1\u5668\u8981\u540c\u65f6\u670d\u52a1\u6210\u767e\u4e0a\u5343\u4e2a\u5ba2\u6237\u7aef\u3002\u600e\u4e48\u89e3\u51b3？\u5f88\u7b80\u5355，\u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u5206\u914d\u4e00\u4e2a\u7ebf\u7a0b，\u8ba9\u5b83\u4eec\u5e76\u53d1\u5904\u7406\u3002<\/p>\n 5.2 \u591a\u7ebf\u7a0b\u7248\u672c\u670d\u52a1\u5668<\/h3>\n\u6539\u9020\u5f88\u7b80\u5355，\u53ea\u9700\u8981\u4fee\u6539start\u65b9\u6cd5，\u6bcf\u6b21accept\u5230\u4e00\u4e2a\u8fde\u63a5，\u5c31\u5f00\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u53bb\u5904\u7406：<\/p>\n public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8!");
\n while (true) {
\n Socket clientSocket = serverSocket.accept();
\n \/\/ \u6bcf\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u5f00\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406
\n Thread t = new Thread(() -> {
\n processConnection(clientSocket);
\n });
\n t.start();
\n }
\n}<\/p>\n \u5c31\u6539\u8fd9\u4e48\u51e0\u884c，\u670d\u52a1\u5668\u5c31\u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u4e86！\u4e3b\u7ebf\u7a0b\u53ea\u8d1f\u8d23\u63a5\u5ba2（accept），\u63a5\u5230\u4e86\u5c31\u4ea4\u7ed9\u5b50\u7ebf\u7a0b\u53bb\u670d\u52a1，\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u63a5\u4e0b\u4e00\u4e2a\u3002<\/p>\n 5.3 \u7ebf\u7a0b\u6c60\u7248\u672c\u670d\u52a1\u5668<\/h3>\n\u591a\u7ebf\u7a0b\u7248\u672c\u867d\u7136\u80fd\u7528，\u4f46\u5982\u679c\u5ba2\u6237\u7aef\u7279\u522b\u591a，\u9891\u7e41\u521b\u5efa\u9500\u6bc1\u7ebf\u7a0b\u5f00\u9500\u5f88\u5927\u3002\u8fd9\u65f6\u5019\u5c31\u53ef\u4ee5\u7528\u7ebf\u7a0b\u6c60\u6765\u4f18\u5316，\u590d\u7528\u7ebf\u7a0b\u51cf\u5c11\u5f00\u9500\u3002<\/p>\n public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8!");
\n \/\/ \u521b\u5efa\u4e00\u4e2a\u7f13\u5b58\u7ebf\u7a0b\u6c60
\n ExecutorService service = Executors.newCachedThreadPool();
\n while (true) {
\n Socket clientSocket = serverSocket.accept();
\n \/\/ \u63d0\u4ea4\u4efb\u52a1\u5230\u7ebf\u7a0b\u6c60
\n service.submit(new Runnable() {
\n @Override
\n public void run() {
\n processConnection(clientSocket);
\n }
\n });
\n }
\n} <\/p>\n \u5c0f\u77e5\u8bc6：newCachedThreadPool\u4f1a\u81ea\u52a8\u521b\u5efa\u7ebf\u7a0b，\u7a7a\u95f2\u7ebf\u7a0b\u4f1a\u88ab\u56de\u6536，\u9002\u5408\u77ed\u4efb\u52a1\u591a\u7684\u573a\u666f\u3002\u5982\u679c\u662f\u957f\u8fde\u63a5\u573a\u666f，\u53ef\u80fd\u9700\u8981\u81ea\u5b9a\u4e49\u7ebf\u7a0b\u6c60\u53c2\u6570\u66f4\u5408\u9002\u3002<\/p>\n \u516d\u3001\u957f\u77ed\u8fde\u63a5\u8be6\u89e3<\/h2>\nTCP\u662f\u6709\u8fde\u63a5\u7684，\u90a3\u8fde\u63a5\u4ec0\u4e48\u65f6\u5019\u5173\u5462？\u8fd9\u5c31\u5f15\u51fa\u4e86\u77ed\u8fde\u63a5\u548c\u957f\u8fde\u63a5\u7684\u6982\u5ff5\u3002<\/p>\n \u77ed\u8fde\u63a5<\/h4>\n\u6bcf\u6b21\u6536\u53d1\u5b8c\u4e00\u6b21\u6570\u636e\u5c31\u5173\u95ed\u8fde\u63a5，\u5c31\u662f\u77ed\u8fde\u63a5\u3002\u4e5f\u5c31\u662f\u8bf4，\u77ed\u8fde\u63a5\u4e00\u6b21\u53ea\u80fd\u6536\u53d1\u4e00\u6b21\u6570\u636e\u3002\u4e0b\u6b21\u8981\u53d1\u6570\u636e，\u5f97\u91cd\u65b0\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n \u957f\u8fde\u63a5<\/h4>\n\u4e0d\u5173\u95ed\u8fde\u63a5，\u4e00\u76f4\u4fdd\u6301\u8fde\u63a5\u72b6\u6001，\u53cc\u65b9\u4e0d\u505c\u7684\u6536\u53d1\u6570\u636e，\u5c31\u662f\u957f\u8fde\u63a5\u3002\u957f\u8fde\u63a5\u53ef\u4ee5\u591a\u6b21\u6536\u53d1\u6570\u636e\u3002<\/p>\n \u4e24\u8005\u5bf9\u6bd4<\/h4>\n\n\n\u5bf9\u6bd4\u9879<\/p>\n \u77ed\u8fde\u63a5<\/p>\n \u957f\u8fde\u63a5<\/p>\n<\/tr>\n \n\n| \n \u5efa\u8fde\u5173\u8fde\u5f00\u9500<\/p>\n<\/td>\n | \n \u6bcf\u6b21\u8bf7\u6c42\u90fd\u8981\u5efa\u8fde\u5173\u8fde，\u5f00\u9500\u5927<\/p>\n<\/td>\n | \n \u53ea\u5efa\u4e00\u6b21\u8fde\u63a5，\u540e\u7eed\u76f4\u63a5\u4f20\u8f93，\u5f00\u9500\u5c0f<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u4e3b\u52a8\u53d1\u8bf7\u6c42<\/p>\n<\/td>\n | \n \u4e00\u822c\u662f\u5ba2\u6237\u7aef\u4e3b\u52a8\u53d1<\/p>\n<\/td>\n | \n \u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u90fd\u53ef\u4ee5\u4e3b\u52a8\u53d1<\/p>\n<\/td>\n<\/tr>\n | \n| \n \u9002\u7528\u573a\u666f<\/p>\n<\/td>\n | \n \u8bf7\u6c42\u9891\u7387\u4e0d\u9ad8，\u5982\u6d4f\u89c8\u7f51\u9875<\/p>\n<\/td>\n | \n \u901a\u4fe1\u9891\u7e41，\u5982\u804a\u5929\u5ba4\u3001\u5b9e\u65f6\u6e38\u620f<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6269\u5c55\u4e86\u89e3：\u6211\u4eec\u4e0a\u9762\u5199\u7684Echo\u670d\u52a1\u5668\u7528\u7684\u5c31\u662f\u957f\u8fde\u63a5\u6a21\u5f0f，\u5ba2\u6237\u7aef\u8fde\u4e0a\u540e\u53ef\u4ee5\u4e00\u76f4\u53d1\u6d88\u606f\u3002\u800cHTTP\u534f\u8bae\u65e9\u671f\u7528\u7684\u662f\u77ed\u8fde\u63a5，\u73b0\u5728HTTP\/1.1\u9ed8\u8ba4\u4e5f\u662f\u957f\u8fde\u63a5\u4e86\u3002<\/p>\n \u53e6\u5916，\u57fa\u4e8eBIO（\u540c\u6b65\u963b\u585eIO）\u7684\u957f\u8fde\u63a5\u6bcf\u4e2a\u8fde\u63a5\u5360\u4e00\u4e2a\u7ebf\u7a0b，\u5e76\u53d1\u9ad8\u4e86\u625b\u4e0d\u4f4f\u3002\u771f\u6b63\u7684\u9ad8\u5e76\u53d1\u670d\u52a1\u4e00\u822c\u7528NIO（\u540c\u6b65\u975e\u963b\u585eIO）\u6765\u5b9e\u73b0\u957f\u8fde\u63a5，\u6027\u80fd\u4f1a\u597d\u5f88\u591a\u3002<\/p>\n \u4e03\u3001\u5e38\u89c1\u5751\u70b9：\u7aef\u53e3\u88ab\u5360\u7528\u600e\u4e48\u529e？<\/h2>\n\u521d\u5b66Socket\u7f16\u7a0b，\u6700\u5bb9\u6613\u9047\u5230\u7684\u62a5\u9519\u5c31\u662f\u7aef\u53e3\u88ab\u5360\u7528\u3002\u5982\u679c\u4f60\u770b\u5230\u8fd9\u4e2a\u5f02\u5e38：<\/p>\n java.net.BindException: Address already in use: JVM_Bind <\/p>\n \u4e0d\u7528\u614c，\u5c31\u662f\u4f60\u8981\u7ed1\u5b9a\u7684\u7aef\u53e3\u5df2\u7ecf\u88ab\u522b\u7684\u8fdb\u7a0b\u5360\u4e86\u3002\u4e00\u4e2a\u7aef\u53e3\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0b\u7ed1\u5b9a\u3002<\/p>\n \u600e\u4e48\u67e5\u54ea\u4e2a\u8fdb\u7a0b\u5360\u4e86\u7aef\u53e3？<\/h4>\nWindows\u4e0b\u6253\u5f00cmd，\u8f93\u5165\u547d\u4ee4：<\/p>\n netstat -ano | findstr 8888 <\/p>\n \u4f1a\u8f93\u51fa\u7c7b\u4f3c\u8fd9\u6837\u7684\u7ed3\u679c，\u6700\u540e\u4e00\u5217\u5c31\u662f\u8fdb\u7a0bPID：<\/p>\n TCP 0.0.0.0:8888 0.0.0.0:0 LISTENING 4588 <\/p>\n \u7136\u540e\u6253\u5f00\u4efb\u52a1\u7ba1\u7406\u5668，\u5728\u8be6\u7ec6\u4fe1\u606f\u91cc\u6309PID\u6392\u5e8f，\u627e\u5230PID\u4e3a4588\u7684\u8fdb\u7a0b，\u5c31\u77e5\u9053\u662f\u8c01\u5360\u4e86\u7aef\u53e3\u3002<\/p>\n \u600e\u4e48\u89e3\u51b3？<\/h4>\n- \n
\u5360\u7aef\u53e3\u7684\u8fdb\u7a0b\u4e0d\u9700\u8981\u4e86：\u76f4\u63a5\u7ed3\u675f\u90a3\u4e2a\u8fdb\u7a0b，\u518d\u542f\u52a8\u4f60\u7684\u7a0b\u5e8f\u5c31\u884c<\/p>\n<\/li>\n - \n
\u5360\u7aef\u53e3\u7684\u8fdb\u7a0b\u8fd8\u8981\u7528：\u6539\u4f60\u81ea\u5df1\u7a0b\u5e8f\u7684\u7aef\u53e3\u53f7，\u6362\u4e00\u4e2a\u6ca1\u88ab\u5360\u7528\u7684\u7aef\u53e3<\/p>\n<\/li>\n \u5c0f\u6280\u5de7：\u4e00\u822c\u5f00\u53d1\u8c03\u8bd5\u75288080\u30019090\u30018888\u8fd9\u4e9b\u7aef\u53e3\u6bd4\u8f83\u591a，\u88ab\u5360\u7528\u4e86\u5c31\u6362\u4e2a\u6570\u5b57\u8bd5\u8bd5，\u6bd4\u59829091\u30019092\u3002<\/p>\n \u6700\u540e，\u6211\u4eec\u6765\u68b3\u7406\u4e00\u4e0b\u8fd9\u7bc7\u6587\u7ae0\u7684\u6838\u5fc3\u77e5\u8bc6\u70b9，\u5e2e\u5927\u5bb6\u5de9\u56fa\u8bb0\u5fc6：<\/p>\n - \n
\u7f51\u7edc\u7f16\u7a0b\u57fa\u7840：\u7f51\u7edc\u7f16\u7a0b\u5c31\u662f\u4e0d\u540c\u4e3b\u673a\u7684\u8fdb\u7a0b\u901a\u8fc7\u7f51\u7edc\u4f20\u8f93\u6570\u636e\u3002\u6838\u5fc3\u6982\u5ff5\u6709\u53d1\u9001\u7aef\/\u63a5\u6536\u7aef\u3001\u8bf7\u6c42\/\u54cd\u5e94\u3001\u5ba2\u6237\u7aef\/\u670d\u52a1\u7aef\u3002<\/p>\n<\/li>\n - \n
Socket\u5957\u63a5\u5b57：\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u7f51\u7edc\u901a\u4fe1API，\u4e3b\u8981\u5206\u4e24\u7c7b：<\/p>\n - \n
UDP\u6570\u636e\u62a5\u5957\u63a5\u5b57：\u65e0\u8fde\u63a5\u3001\u4e0d\u53ef\u9760\u3001\u9762\u5411\u6570\u636e\u62a5\u3001\u901f\u5ea6\u5feb<\/p>\n<\/li>\n - \n
TCP\u6d41\u5957\u63a5\u5b57：\u6709\u8fde\u63a5\u3001\u53ef\u9760\u4f20\u8f93\u3001\u9762\u5411\u5b57\u8282\u6d41\u3001\u7a33\u5b9a\u53ef\u9760<\/p>\n<\/li>\n<\/li>\n - \n
UDP\u7f16\u7a0b：\u6838\u5fc3\u7c7b\u662fDatagramSocket\u548cDatagramPacket\u3002\u670d\u52a1\u7aef\u5faa\u73afreceive\u63a5\u6536\u8bf7\u6c42\u2192process\u5904\u7406\u2192send\u8fd4\u56de\u54cd\u5e94\u3002<\/p>\n<\/li>\n - \n
TCP\u7f16\u7a0b：\u6838\u5fc3\u7c7b\u662fServerSocket\u548cSocket\u3002\u670d\u52a1\u7aefaccept\u7b49\u5f85\u8fde\u63a5\u2192\u5efa\u7acb\u8fde\u63a5\u540e\u901a\u8fc7InputStream\/OutputStream\u8bfb\u5199\u6570\u636e，\u548c\u64cd\u4f5c\u6587\u4ef6\u6d41\u4e00\u6a21\u4e00\u6837\u3002<\/p>\n<\/li>\n - \n
\u670d\u52a1\u5668\u4f18\u5316：\u5355\u7ebf\u7a0b\u670d\u52a1\u5668\u4e00\u6b21\u53ea\u80fd\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef，\u7528\u591a\u7ebf\u7a0b\u6216\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u5b9e\u73b0\u5e76\u53d1\u5904\u7406\u3002<\/p>\n<\/li>\n - \n
\u957f\u77ed\u8fde\u63a5：\u77ed\u8fde\u63a5\u4e00\u6b21\u8bf7\u6c42\u4e00\u5173\u8fde\u63a5，\u957f\u8fde\u63a5\u4fdd\u6301\u8fde\u63a5\u591a\u6b21\u901a\u4fe1\u3002\u8bf7\u6c42\u9891\u7387\u4f4e\u7528\u77ed\u8fde\u63a5，\u901a\u4fe1\u9891\u7e41\u7528\u957f\u8fde\u63a5\u3002<\/p>\n<\/li>\n - \n
\u5e38\u89c1\u5751：\u7aef\u53e3\u88ab\u5360\u7528\u62a5BindException，\u7528netstat\u67e5PID\u7ed3\u675f\u8fdb\u7a0b\u6216\u6362\u7aef\u53e3\u3002<\/p>\n<\/li>\n
\n\u7f51\u7edc\u7f16\u7a0b\u662fJava\u540e\u7aef\u7684\u57fa\u7840\u4e2d\u7684\u57fa\u7840，\u4e0d\u7ba1\u662f\u505aWeb\u5f00\u53d1\u3001\u5fae\u670d\u52a1\u8fd8\u662f\u5206\u5e03\u5f0f\u7cfb\u7edf，\u5e95\u5c42\u90fd\u79bb\u4e0d\u5f00Socket\u3002\u5efa\u8bae\u5927\u5bb6\u628a\u6587\u4e2d\u7684\u4ee3\u7801\u90fd\u4eb2\u624b\u6572\u4e00\u904d\u8dd1\u8d77\u6765，\u771f\u6b63\u7406\u89e3\u6570\u636e\u662f\u600e\u4e48\u6536\u53d1\u7684\u3002<\/p>\n \u5982\u679c\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u5e2e\u52a9，\u6b22\u8fce\u70b9\u8d5e\u6536\u85cf\u5173\u6ce8，\u540e\u7eed\u8fd8\u4f1a\u66f4\u65b0\u66f4\u591a\u7f51\u7edc\u7f16\u7a0b\u8fdb\u9636\u5185\u5bb9！<\/p>\n","protected":false},"excerpt":{"rendered":" \u76ee\u5f55 \u524d\u8a00：\u4e3a\u4ec0\u4e48\u8981\u5b66\u7f51\u7edc\u7f16\u7a0b？
\n\u4e00\u3001\u7f51\u7edc\u7f16\u7a0b\u57fa\u7840\u6982\u5ff5
\n1.1 \u4ec0\u4e48\u662f\u7f51\u7edc\u7f16\u7a0b
\n1.2 \u53d1\u9001\u7aef\u4e0e\u63a5\u6536\u7aef
\n1.4 \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef
\n\u4e8c\u3001Socket\u5957\u63a5\u5b57\u662f\u4ec0\u4e48？
\n2.1 \u5957\u63a5\u5b57\u7684\u6982\u5ff5
\n2.3 TCP vs UDP \u6838\u5fc3\u5bf9\u6bd4
\n\u4e09\u3001UDP\u6570\u636e\u62a5\u5957\u63a5\u5b57\u7f16\u7a0b
\n3.1 UDP\u901a\u4fe1\u6a21\u578b
\n3.2 \u6838\u5fc3API\u4ecb\u7ecd
\nDatagramSocket
\nDatagramPacket
\n3.3 \u5b9e\u6218\u4e00：Echo\u56de\u663e\u670d\u52a1\u5668
\nU<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[151,78,191],"topic":[],"class_list":["post-81375","post","type-post","status-publish","format-standard","hentry","category-server","tag-http","tag-78","tag-191"],"yoast_head":"\n Socket\u7f51\u7edc\u7f16\u7a0b\u5165\u95e8\uff1aUDP+TCP\u53cc\u6848\u4f8b\u624b\u628a\u624b\u6559\u4f60\u5199\u670d\u52a1\u5668 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/81375.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Socket\u7f51\u7edc\u7f16\u7a0b\u5165\u95e8\uff1aUDP+TCP\u53cc\u6848\u4f8b\u624b\u628a\u624b\u6559\u4f60\u5199\u670d\u52a1\u5668 - 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