{"id":17727,"date":"2025-04-19T00:13:18","date_gmt":"2025-04-18T16:13:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/17727.html"},"modified":"2025-04-19T00:13:18","modified_gmt":"2025-04-18T16:13:18","slug":"%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%ef%bc%88udptcp%e5%9b%9e%e6%98%be%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/17727.html","title":{"rendered":"\u7f51\u7edc\u7f16\u7a0b\uff08UDP\\\\TCP\u56de\u663e\u670d\u52a1\u5668\uff09"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\n

\u5957\u63a5\u5b57socket<\/p>\n

TCP\u548cUDP\u7279\u70b9\u6bd4\u8f83\u00a0<\/p>\n

\u7279\u70b9<\/p>\n

\u6bd4\u8f83<\/p>\n

UDP\u56de\u663e\u670d\u52a1\u5668\/\u5ba2\u6237\u7aef\u7684\u7f16\u5199<\/p>\n

UDP\u7684socket api<\/p>\n

\u56de\u663e\u670d\u52a1\u5668<\/p>\n

\u5ba2\u6237\u7aef<\/p>\n

TCP\u56de\u663e\u670d\u52a1\u5668\/\u5ba2\u6237\u7aef\u7684\u7f16\u5199<\/p>\n

TCP\u7684socket api<\/p>\n

\u56de\u663e\u670d\u52a1\u5668<\/p>\n

\u5ba2\u6237\u7aef<\/p>\n

\u4f18\u5316\u670d\u52a1\u5668<\/p>\n

1.\u5173\u95ed\u670d\u52a1\u5668\u521b\u5efa\u7684socket\u5bf9\u8c61<\/p>\n

2.\u5f15\u5165\u7ebf\u7a0b\u6c60，\u4e3a\u591a\u4e2a\u5ba2\u6237\u7aef\u63d0\u4f9b\u670d\u52a1\u00a0<\/p>\n

\n

\u5957\u63a5\u5b57socket<\/h2>\n

\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u7f51\u7edc\u7f16\u7a0b\u7684API\u79f0\u4e3a\u201csocket api\u201d，\u5728\u4f20\u8f93\u5c42\u4e2d，TCP\u548cUDP\u4e24\u79cd\u534f\u8bae\u7684\u7279\u70b9\u548c\u5dee\u5f02\u975e\u5e38\u5927，\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u5c31\u63d0\u4f9b\u4e86\u4e24\u5957api\u6765\u5206\u522b\u8868\u793a：<\/p>\n

\u6d41\u5f0f\u5957\u63a5\u5b57 -> TCP\u4f7f\u7528<\/p>\n

\u6570\u636e\u62a5\u5957\u63a5\u5b57 -> UDP\u4f7f\u7528<\/p>\n

\u9664\u6b64\u4e4b\u5916\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u6709\u5176\u4ed6\u7684\u5173\u4e8e\u7f51\u7edc\u7f16\u7a0b\u7684API，\u6bd4\u5982Unix\u57df\u5957\u63a5\u5b57，\u53ea\u662f\u672c\u5730\u4e3b\u673a\u4e0a\u7684\u8fdb\u7a0b\u548c\u8fdb\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\u65b9\u5f0f，\u4e0d\u80fd\u8de8\u4e3b\u673a\u901a\u4fe1，\u73b0\u5728\u5f88\u5c11\u4f7f\u7528\u3002<\/p>\n

TCP\u548cUDP\u7279\u70b9\u6bd4\u8f83\u00a0<\/h2>\n

\u7279\u70b9<\/h3>\n

TCP：\u6709\u8fde\u63a5，\u53ef\u9760\u4f20\u8f93，\u9762\u5411\u5b57\u8282\u6d41，\u5168\u53cc\u5de5\u3002<\/p>\n

UDP：\u65e0\u8fde\u63a5，\u4e0d\u53ef\u9760\u4f20\u8f93，\u9762\u5411\u6570\u636e\u62a5，\u5168\u53cc\u5de5\u3002<\/p>\n

\u6bd4\u8f83<\/h3>\n

\u6709\u8fde\u63a5vs\u65e0\u8fde\u63a5<\/span>：<\/p>\n

\u6709\u8fde\u63a5\u5219\u662f\u901a\u4fe1\u53cc\u65b9\u4fdd\u5b58\u5bf9\u65b9\u7684\u4fe1\u606f，\u5220\u9664\u4fe1\u606f\u5219\u65ad\u5f00\u8fde\u63a5，\u65e0\u8fde\u63a5\u5219\u662f\u901a\u4fe1\u53cc\u65b9\u4e0d\u9700\u8981\u4fdd\u5b58\u5404\u81ea\u4fe1\u606f\u3002\u5728\u8ba1\u7b97\u673a\u4e2d，\u5404\u81ea\u4fdd\u5b58\u53cc\u65b9\u7684\u4fe1\u606f，\u5c31\u8ba4\u4e3a\u662f\u5efa\u7acb\u4e86\u4e00\u4e2a\u62bd\u8c61\u7684\u8fde\u63a5\u3002<\/p>\n

\u53ef\u9760\u4f20\u8f93vs\u4e0d\u53ef\u9760\u4f20\u8f93<\/span>：<\/p>\n

\u53ef\u9760 != \u5b89\u5168，\u53ef\u9760\u503c\u8981\u4f20\u8f93\u7684\u6570\u5c3d\u53ef\u80fd\u7684\u5168\u90e8\u4f20\u8f93\u7ed9\u5bf9\u65b9，\u5728\u7f51\u7edc\u901a\u4fe1\u8fc7\u7a0b\u4e2d，\u53ef\u80fd\u4f1a\u5b58\u5728\u591a\u79cd\u610f\u5916\u60c5\u51b5，\u6bd4\u5982\u4e22\u5305，\u4e22\u5305\u7684\u8fc7\u7a0b\u662f\u968f\u673a\u7684，\u65e0\u6cd5\u9884\u77e5\u3002\u4e3a\u4e86\u5bf9\u6297\u4e22\u5305，\u5f15\u5165\u4e86\u53ef\u9760\u4f20\u8f93\u7279\u70b9，TCP\u5177\u4f53\u8fd9\u4e00\u7279\u70b9，\u5185\u90e8\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u673a\u5236\u6765\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93，UDP\u5219\u662f\u4e0d\u53ef\u9760\u4f20\u8f93，\u4f20\u8f93\u6570\u636e\u65f6\u4e0d\u4f1a\u5173\u5fc3\u6570\u636e\u662f\u5426\u5230\u8fbe，\u63a5\u6536\u65b9\u662f\u5426\u6536\u5230\u3002\u00a0<\/p>\n

\u9762\u5411\u5b57\u8282\u6d41vs\u9762\u5411\u6570\u636e\u62a5<\/span>:<\/p>\n

TCP\u548c\u6587\u4ef6\u64cd\u4f5c\u90fd\u662f\u9762\u5411\u5b57\u8282\u6d41\u7684，\u8bfb\u5199\u64cd\u4f5c\u975e\u5e38\u7075\u6d3b\u3002UDP\u9762\u5411\u6570\u636e\u62a5，\u4f20\u8f93\u7684\u57fa\u672c\u5355\u4f4d\u662f\u4e00\u4e2a\u4e2aUDP\u6570\u636e\u62a5，\u6bcf\u6b21\u8bfb\u5199\u53ea\u80fd\u8bfb\u5199\u4e00\u4e2a\u5b8c\u6574\u7684UDP\u6570\u636e\u62a5\u3002<\/p>\n

\u5168\u53cc\u5de5vs\u7248\u53cc\u5de5<\/span>:<\/p>\n

\u5168\u53cc\u5de5：\u4e00\u6761\u94fe\u8def\u80fd\u591f\u8fdb\u884c\u53cc\u5411\u901a\u4fe1（TCP\/UDP\u90fd\u662f），\u5728；\u4e00\u6761\u94fe\u8def\u4e0a\u65e2\u53ef\u4ee5\u63a5\u6536\u4e5f\u53ef\u4ee5\u53d1\u9001\u3002<\/p>\n

\u534a\u53cc\u5de5：\u4e00\u6761\u94fe\u8def，\u53ea\u80fd\u8fdb\u884c\u5355\u5411\u901a\u4fe1，\u5728Linux\u4e2d，\u7cfb\u7edf\u63d0\u4f9b\u7684\u4e00\u79cd\u8f6f\u4ef6\u8d44\u6e90：\u7ba1\u9053，\u5c31\u662f\u534a\u53cc\u5de5,\u63a5\u6536\u548c\u53d1\u9001\u4e0d\u80fd\u540c\u65f6\u8fdb\u884c\u3002<\/p>\n

UDP\u56de\u663e\u670d\u52a1\u5668\/\u5ba2\u6237\u7aef\u7684\u7f16\u5199<\/h2>\n

UDP\u7684socket api<\/h3>\n

java\u5bf9\u4e8e\u7cfb\u7edf\u63d0\u4f9b\u7684\u7f51\u7edc\u7f16\u7a0bapi（socket api）\u8fdb\u884c\u4e86\u8fdb\u4e00\u6b65\u5c01\u88c5，\u8fdb\u884cUDP\u7f51\u7edc\u7f16\u7a0b\u4ee3\u7801\u7f16\u5199\u65f6，\u9700\u8981\u91cd\u70b9\u7406\u89e3\u4e24\u4e2a\u7c7b：<\/p>\n

（1）DatagramSocket：\u8fd9\u4e2a\u7c7b\u662f\u5bf9\u64cd\u4f5c\u7cfb\u7edfsocket\u6982\u5ff5\u7684\u5c01\u88c5，\u7cfb\u7edf\u4e2d\u7684socket\u53ef\u4ee5\u7406\u89e3\u4e3a\u6587\u4ef6，socket\u6587\u4ef6\u53ef\u4ee5\u89c6\u4e3a\u7f51\u5361\u8fd9\u4e2a\u8bbe\u5907\u7684\u62bd\u8c61\u8868\u793a\u5f62\u5f0f，\u9488\u5bf9socket\u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c\u8bfe\u76f8\u5f53\u4e8e\u5bf9\u7f51\u5361\u8fd9\u4e2a\u786c\u4ef6\u8bbe\u5907\u8fdb\u884c\u8bfb\u5199\u3002\u5176\u5b9e\u4e4b\u524d\u5b66\u4e60\u7684\u666e\u901a\u6587\u4ef6，\u5c31\u662f\u5bf9\u786c\u76d8\u8fd9\u4e2a\u786c\u4ef6\u8bbe\u5907\u7684\u62bd\u8c61，\u76f4\u63a5\u64cd\u4f5c\u786c\u76d8\u4e0d\u65b9\u4fbf，\u501f\u52a9\u6587\u4ef6\u8fdb\u884c\u64cd\u4f5c\u5c31\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u5b8c\u6210\u3002<\/span>\u7c7b\u4f3c\u4e8e\u7535\u89c6\u673a\u7684\u9065\u63a7\u5668，\u901a\u8fc7\u9065\u63a7\u5668\u6765\u4f7f\u7528\u7535\u89c6\u5267\u66f4\u52a0\u65b9\u4fbf\u3002<\/p>\n

\u8ba1\u7b97\u673a\u4e2d\u5bf9\u5177\u6709\u201d\u9065\u63a7\u5c5e\u6027\u201c\u8fd9\u6837\u6982\u5ff5\u7684\u53eb\u505a\u53e5\u67c4（handle）\u3002<\/p>\n

（2）DatagramPacket：\u9488\u5bf9UDP\u6570\u636e\u62a5\u7684\u62bd\u8c61\u8868\u793a，\u4e00\u4e2aDatagramPacket\u5bf9\u8c61，\u5c31\u76f8\u5f53\u4e0e\u4e00\u4e2aUDP\u6570\u636e\u62a5，\u4e00\u6b21\u53d1\u9001\/\u4e00\u6b21\u63a5\u6536\u5c31\u662f\u4f20\u8f93\u4e86\u4e00\u4e2aDatagramPacket\u5bf9\u8c61\u3002<\/p>\n

\u56de\u663e\u670d\u52a1\u5668<\/h3>\n

Echo\u79f0\u4e3a\u56de\u663e，\u6b63\u5e38\u670d\u52a1\u5668\u53d1\u9001\u4e0d\u540c\u8bf7\u6c42\u5c31\u4f1a\u6709\u4e0d\u540c\u54cd\u5e94，\u56de\u663e\u670d\u52a1\u5668\u5c31\u662f\u8bf7\u6c42\u53d1\u4e86\u4ec0\u4e48，\u54cd\u5e94\u5c31\u662f\u5565，\u8fd9\u4e2a\u8fc7\u7a0b\u4e0d\u6d89\u53ca\u8ba1\u7b97\u548c\u903b\u8f91\u4e1a\u52a1，\u662f\u6700\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u670d\u52a1\u5668\u7a0b\u5e8f\u3002<\/p>\n

\u00a0\u7f16\u5199\u670d\u52a1\u5668\u7a0b\u5e8f\u65f6，\u9996\u5148\u9700\u8981\u786e\u5b9a\u7aef\u53e3\u53f7，\u5ba2\u6237\u7aef\u662f\u4e3b\u52a8\u7684\u4e00\u65b9，\u670d\u52a1\u5668\u662f\u88ab\u52a8\u7684\u4e00\u65b9，\u5ba2\u6237\u7aef\u9700\u8981\u627e\u5230\u670d\u52a1\u5668\u5728\u54ea\u3002<\/p>\n

IP\u5730\u5740（\u670d\u52a1\u5668\u6240\u5728\u4e3b\u673a\u7684IP\u5730\u5740），port\u7aef\u53e3\u53f7（\u4e00\u4e2a\u4e3b\u673a\u4e0a，\u6709\u591a\u4e2a\u7a0b\u5e8f\u90fd\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1，\u9700\u8981\u628a\u90a3\u4e2a\u7a0b\u5e8f\u7528\u7684\u54ea\u4e2a\u7aef\u53e3\u53f7\u8bb0\u5f55\u4e0b\u6765，\u5e76\u8981\u786e\u4fdd\u4e00\u4e2a\u7aef\u53e3\u53f7\u4e0d\u80fd\u88ab\u4e24\u4e2a\u6216\u591a\u4e2a\u8fdb\u7a0b\u5173\u8054）\u3002<\/p>\n

import java.io.IOException;
\nimport java.net.DatagramSocket;<\/p>\n

public class UdppEchoServer {
\n private DatagramSocket socket = null;
\n public UdppEchoServer(int port) throws IOException {
\n socket = new DatagramSocket(port);
\n }
\n} <\/p>\n

\u53ef\u4ee5\u770b\u5230\u629b\u51fa\u7684\u4e00\u5f02\u5e38\u53ef\u4ee5\u662fIOException，\u4e5f\u5c31\u662f\u8bf4\u660e\u7f51\u7edc\u7f16\u7a0b\u7684\u672c\u8d28\u662fIO\u64cd\u4f5c\u3002<\/p>\n

\u63a5\u4e0b\u6765\u8981\u8ba9\u670d\u52a1\u5668\u53ef\u4ee5\u4e0d\u505c\u7684\u5904\u7406\u8bf7\u6c42，\u4e0d\u505c\u7684\u8fd4\u56de\u54cd\u5e94：<\/p>\n

\u7b2c\u4e00\u6b65：\u8bfb\u53d6\u8bf7\u6c42\u5e76\u5bf9\u8bf7\u6c42\u8fdb\u884c\u89e3\u6790<\/span>，\u6784\u9020\u4e00\u4e2a\u6570\u636e\u62a5\u7c7b\u7684\u5b9e\u4f8b，\u5bf9\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6570\u636e\u8fdb\u884c\u63a5\u6536，\u653e\u5165\u5b9e\u4f8b\u4e2d，\u5bf9\u6570\u636e\u8fdb\u884c\u89e3\u6790,\u6700\u540e\u4e3a\u4e86\u65b9\u4fbf\u6253\u5370，\u5c06\u6570\u636e\u62a5\u4e2d\u7684\u4e8c\u8fdb\u5236\u6570\u62ff\u51fa\u6765，\u8f6c\u6362\u4e3aString\u7c7b\u578b\u7684\u6570\u636e，String\u6709\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5，\u901a\u8fc7\u5b57\u8282\u6570\u7ec4\u6765\u6784\u9020\u3002<\/p>\n

DatagramPacket requestPacket = new DatagramPacket(new byte[4096],4096);
\n socket.receive(requestPacket);
\n String request = new String(requestPacket.getData(),0, requestPacket.getLength()); <\/p>\n

\u7b2c\u4e8c\u6b65：\u6839\u636e\u8bf7\u6c42\u8fd4\u56de\u54cd\u5e94<\/span>，\u7531\u4e8e\u662f\u56de\u663e\u670d\u52a1\u5668，\u8ba1\u7b97\u8bf7\u6c42\u7684\u65b9\u6cd5\u76f4\u63a5\u8fd4\u56de\u5c31\u884c，\u8fd4\u56de\u7684\u54cd\u5e94\u4f7f\u7528String\u8fdb\u884c\u63a5\u6536\u3002<\/p>\n

String response = process(request);
\npublic String process(String request) {
\n return request;
\n} <\/p>\n

\u7b2c\u4e09\u6b65：\u5c06\u54cd\u5e94\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef<\/span>，\u53d1\u9001\u65f6\u9700\u8981\u77e5\u9053\u63a5\u6536\u5bf9\u8c61\u7684IP\u548c\u7aef\u53e3\u53f7，\u53ef\u4ee5\u901a\u8fc7\u63a5\u6536\u7684UDP\u6570\u636e\u62a5\u62ff\u5230\u53d1\u9001\u5ba2\u6237\u7aef\u7684\u4fe1\u606f，\u62ff\u5230\u4e4b\u540e\u653e\u5230\u54cd\u5e94\u7684\u6570\u636e\u62a5\u4e2d\u4f7f\u7528send()\u65b9\u6cd5\u53d1\u9001，\u6700\u540e\u5728\u670d\u52a1\u5668\u4e0a\u9762\u6253\u5370\u5173\u952e\u4fe1\u606f\u3002<\/p>\n

\/\/\u628a\u54cd\u5e94\u5199\u56de\u5230\u5ba2\u6237\u7aef
\n\/\/\u6784\u9020UDP\u6570\u636e\u5305
\nDatagramPacket responsePacket = new DatagramPacket(response.getBytes(),0,response.getBytes().length,
\n requestPacket.getSocketAddress());
\n\/\/\u53d1\u9001\u8bf7\u6c42\u5230\u5ba2\u6237\u7aef
\n socket.send(responsePacket);
\n System.out.printf("[%s %d] req = %s, resp =%s\\\\n",requestPacket.getAddress(),requestPacket.getPort(),request,response); <\/p>\n

\u8ba9\u7a0b\u5e8f\u542f\u52a8\u540e\u4e0d\u65ad\u8fd0\u884c，\u52a0\u4e0awhile\u5faa\u73af，\u4e00\u4e2a\u5b8c\u6574\u7684UDP\u56de\u663e\u670d\u52a1\u5668\u5c31\u6b64\u5b8c\u6210\u4e86\u3002<\/p>\n<\/p>\n

\u5ba2\u6237\u7aef<\/h3>\n

\u5ba2\u6237\u7aef\u9700\u8981\u6709\u81ea\u5df1\u7684\u7aef\u53e3\u53f7\u548cip\u5730\u5740，\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5728\u4e00\u53f0\u4e3b\u673a\u4e0a\u65f6\u5c31\u53ef\u4ee5\u5199\u672c\u5730\u73af\u56de\u5730\u5740（127.0.0.1），\u7aef\u53e3\u53f7\u662f\u670d\u52a1\u5668\u5728\u521b\u5efasocket\u65f6\u6307\u5b9a\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n

public class UdpEchoClient {
\n private DatagramSocket socket = null;
\n private String serverPort;
\n private String serverIP;
\n public UdpEchoClient(String serverPort,String serverIP) throws SocketException {
\n socket = new DatagramSocket();
\n this.serverPort = serverPort;
\n this.serverIP = serverIP;
\n }
\n} <\/p>\n

\u00a0\u5728\u521b\u5efasocket\u5bf9\u8c61\u65f6\u5e76\u6ca1\u6709\u6307\u5b9a\u7aef\u53e3\u53f7，\u8fd9\u662f\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5206\u914d\u4e00\u4e2a\u7aef\u53e3\u53f7，\u8fd9\u4e2a\u81ea\u52a8\u7684\u7aef\u53e3\u53f7\u6bcf\u6b21\u91cd\u542f\u90fd\u4f1a\u4e0d\u4e00\u6837\u3002<\/p>\n

\u670d\u52a1\u5668\u9700\u8981\u56fa\u5b9a\u7aef\u53e3\u53f7，\u800c\u5ba2\u6237\u7aef\u9700\u8981\u8ba9\u7cfb\u7edf\u81ea\u52a8\u5206\u914d：<\/p>\n

（1）\u670d\u52a1\u5668\u8981\u6709\u56fa\u5b9a\u7aef\u53e3\u53f7，\u662f\u56e0\u4e3a\u5ba2\u6237\u7aef\u9700\u8981\u4e3b\u52a8\u7ed9\u670d\u52a1\u5668\u53d1\u8bf7\u6c42，\u5982\u679c\u670d\u52a1\u5668\u7aef\u53e3\u53f7\u4e0d\u662f\u56fa\u5b9a\u7684，\u5ba2\u6237\u7aef\u5c31\u4f1a\u4e0d\u77e5\u9053\u628a\u8bf7\u6c42\u53d1\u7ed9\u8c01\u4e86\u3002<\/p>\n

（2）\u5ba2\u6237\u7aef\u9700\u8981\u7cfb\u7edf\u81ea\u52a8\u5206\u914d，\u6307\u5b9a\u56fa\u5b9a\u7684\u7aef\u53e3\u53f7\u662f\u4e0d\u884c\u7684，\u6307\u5b9a\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u53f7，\u53ef\u80fd\u4f1a\u548c\u5ba2\u6237\u7aef\u6240\u5728\u7535\u8111\u4e0a\u7684\u5176\u4ed6\u7a0b\u5e8f\u51b2\u7a81，\u4e00\u65e6\u7aef\u53e3\u51b2\u7a81，\u5c31\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u542f\u52a8\u4e0d\u4e86\u3002\u670d\u52a1\u5668\u5728\u81ea\u5df1\u624b\u91cc，\u5c31\u7b97\u7aef\u53e3\u51b2\u7a81\u4e5f\u662f\u53ef\u4ee5\u8c03\u6574\u7684，\u4f46\u5ba2\u6237\u7aef\u4e0d\u5728\u672c\u673a\u4e0a\u65f6，\u7aef\u53e3\u51b2\u7a81\u96be\u4ee5\u89e3\u51b3\u3002<\/p>\n

\u5ba2\u6237\u7aef\u903b\u8f91\u5728\u7f16\u5199\u65f6\u548c\u670d\u52a1\u5668\u6709\u76f8\u540c\u4e4b\u5904，\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u540e，\u4f7f\u7528UDP\u6570\u636e\u62a5\u6765\u63a5\u53d7\u54cd\u5e94\u3002<\/p>\n

import java.io.IOException;
\nimport java.net.*;
\nimport java.util.Scanner;
\npublic class UdpEchoClient {
\n private DatagramSocket socket = null;
\n private int serverPort;
\n private String serverIP;
\n public UdpEchoClient(String serverIP,int serverPort) throws SocketException {
\n socket = new DatagramSocket();
\n this.serverPort = serverPort;
\n this.serverIP = serverIP;
\n }
\n public void start() throws IOException {
\n System.out.println("\u5ba2\u6237\u7aef\u542f\u52a8");
\n Scanner scanner = new Scanner(System.in);
\n while (true) {
\n \/\/\u8f93\u5165\u8bf7\u6c42
\n System.out.println("\u8bf7\u8f93\u5165\u8bf7\u6c42: ");
\n String request = scanner.next();
\n \/\/\u6784\u9020\u8bf7\u6c42
\n DatagramPacket requestPacket = new DatagramPacket(request.getBytes(),0,request.getBytes().length,
\n InetAddress.getByName(serverIP),serverPort);
\n \/\/\u53d1\u9001\u8bf7\u6c42
\n socket.send(requestPacket);
\n \/\/\u6784\u9020\u63a5\u6536\u7684\u6570\u636e\u62a5
\n DatagramPacket responsePack = new DatagramPacket(new byte[4096],4096);
\n \/\/\u63a5\u6536\u670d\u52a1\u5668\u8fd4\u56de\u7684\u7ed3\u679c
\n socket.receive(responsePack);
\n \/\/\u8f6c\u6362\u6210String\u7c7b\u578b
\n String response = new String(responsePack.getData(),0, responsePack.getLength());
\n System.out.println(response);
\n }
\n }<\/p>\n

public static void main(String[] args) throws IOException {
\n UdpEchoClient udpEchoClient = new UdpEchoClient("127.0.0.1",9090);
\n udpEchoClient.start();
\n }
\n} <\/p>\n

\u00a0\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u540c\u65f6\u542f\u52a8，\u5ba2\u6237\u7aef\u53d1\u9001\u6d88\u606f，\u670d\u52a1\u5668\u90fd\u4f1a\u56de\u663e\u56de\u6765，\u5e76\u5728\u63a7\u5236\u53f0\u6253\u5370\u76f8\u5e94\u7684ip\u5730\u5740，\u7aef\u53e3\u53f7，\u8bf7\u6c42\u548c\u54cd\u5e94：<\/p>\n

\"\"<\/p>\n

TCP\u56de\u663e\u670d\u52a1\u5668\/\u5ba2\u6237\u7aef\u7684\u7f16\u5199<\/h2>\n

TCP\u7684socket api<\/h3>\n

\u4e3b\u8981\u6d89\u53ca\u4e24\u4e2a\u7c7b：ServerSocket\u548cSocket\u3002<\/p>\n

ServerSocket\u662f\u4e13\u95e8\u63d0\u4f9b\u7ed9\u670d\u52a1\u5668\u4f7f\u7528\u7684，ServerSocket\u5728 \u5b9e\u4f8b\u5316\u65f6\u8c03\u7528\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\u81ea\u5e26\u7aef\u53e3\u53f7，\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u5305\u542b\u4e00\u4e2aaccept\u65b9\u6cd5，\u662f\u4e00\u4e2a\u7c7b\u4f3c\u63a5\u901a\u529f\u80fd\u7684\u65b9\u6cd5\u3002<\/p>\n

Socket\u662f\u7ed9\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u90fd\u63d0\u4f9b\u670d\u52a1，\u901a\u8fc7Socket\u7684\u6784\u9020\u65b9\u6cd5\u80fd\u591f\u548c\u6307\u5b9a\u7684\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n

TCP\u4e2d\u901a\u8fc7\u4f7f\u7528InputStream\u548cOutputStream\u8fdb\u884c\u6587\u4ef6\u8bfb\u5199\u64cd\u4f5c，\u901a\u8fc7\u4e24\u4e2aget\u65b9\u6cd5\u6765\u83b7\u53d6socket\u5185\u90e8\u6d41\u5bf9\u8c61\u3002<\/p>\n

Socket socket = new Socket();
\nsocket.getInputStream();
\nsocket.getOutputStream(); <\/p>\n

Tcp\u662f\u5b57\u8282\u6d41\u4f20\u8f93，\u4f20\u8f93\u57fa\u672c\u5355\u4f4d\u662f\u5b57\u8282\u3002<\/p>\n

ServerSocket\u548cSocket\u7684\u529f\u80fd\u4e0d\u540c：\u5bf9\u4e8e\u670d\u52a1\u5668\u6765\u8bf4，\u9700\u8981\u4e0a\u6765\u4e0e\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5，\u5efa\u7acb\u8fde\u63a5\u8981\u4f7f\u7528ServerSocket\u5bf9\u8c61\u7684accept\u65b9\u6cd5，\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4e3asocket\u7c7b\u578b；\u670d\u52a1\u5668\u4e00\u542f\u52a8\u5c31\u4f1a\u6267\u884c\u5230\u5efa\u7acb\u8fde\u63a5\u7684\u4f4d\u7f6e，\u5982\u679c\u6b64\u65f6\u6ca1\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u90a3\u4e48accept\u65b9\u6cd5\u5c31\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001，\u76f4\u5230\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u3002\u4e5f\u5c31\u662f\u8bf4，ServerSocket\u662f\u7528\u4e0e\u5efa\u7acb\u8fde\u63a5\u4f7f\u7528\u7684，\u8fde\u63a5\u540e\u5c06socket\u5bf9\u8c61\u4ea4\u7ed9socket\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

\u56de\u663e\u670d\u52a1\u5668<\/h3>\n

\u00a0\u6bcf\u6b21\u521b\u5efa\u4e00\u4e2a\u670d\u52a1\u5668\u5bf9\u8c61\u90fd\u8981\u521b\u5efa\u4e00\u4e2aSerrverSocket\u6765\u8fde\u63a5\u5ba2\u6237\u7aef，\u521b\u5efa\u670d\u52a1\u5668\u65f6\u8981\u5305\u542b \u7aef\u53e3\u53f7，\u5426\u5219\u5ba2\u6237\u7aef\u6ca1\u6709\u7aef\u53e3\u53f7\u5c31\u65e0\u6cd5\u8fde\u63a5\u3002<\/p>\n

public class TcpEchoServer {
\n private ServerSocket serverSocket = null;<\/p>\n

public TcpEchoServer(int port) throws IOException {
\n serverSocket = new ServerSocket(port);
\n }
\n} <\/p>\n

\u00a0\u5728\u670d\u52a1\u5668\u4e2d\u521b\u5efastart\u65b9\u6cd5\u7528\u6765\u542f\u52a8\u670d\u52a1\u5668，\u8c03\u7528start\u65b9\u6cd5\u540e\u670d\u52a1\u5668\u5f00\u59cb\u4e0d\u65ad\u7684\u6267\u884c\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42，\u4e0d\u505c\u7684\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u5c31\u9700\u8981\u4e0d\u505c\u7684\u4e0e\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5，\u901a\u8fc7\u8c03\u7528process()\u65b9\u6cd5\u53bb\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42，\u5c06\u548c\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5\u7684\u4fe1\u606f\u4f7f\u7528socket\u63a5\u6536，\u4f20\u9012\u7ed9process\u65b9\u6cd5：<\/p>\n

public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8");
\n while (true) {
\n Socket socket = serverSocket.accept();
\n possess(socket);
\n }
\n } <\/p>\n

\u00a0\u5b9e\u73b0process\u65b9\u6cd5，\u8981\u6ce8\u610fTCP\u662f\u9762\u5411\u5b57\u8282\u6d41\u4f20\u8f93，\u6b64\u65f6\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u65f6\u9700\u8981\u4f7f\u7528InputStream\u548cOutputStream，\u8fd9\u4e24\u4e2a\u7c7b\u5728\u4f7f\u7528\u5b8c\u540e\u5fc5\u987b\u56de\u6536\u9632\u6b62\u8d44\u6e90\u6cc4\u9732，\u907f\u514d\u6570\u636e\u4e22\u5931，\u4f7f\u7528 try-catch\u65b9\u6cd5\u91cc\u7684try with source\u7528\u6cd5，\u628a\u5bf9\u8c61\u653e\u5230try()\u4e2d，\u4f7f\u7528 \u5b8c\u6bd5\u4f1a\u81ea\u52a8\u56de\u6536\u8d44\u6e90\u3002\u83b7\u5f97\u6570\u636e\u540e\u53ef\u4ee5\u4f7f\u7528Read\u7c7b\u8bfb\u53d6\u8bf7\u6c42，\u4f46\u662fRead\u7c7b\u8bfb\u53d6\u8bf7\u6c42\u540e\u5f97\u5230\u7684\u662fbyte\u6570\u7ec4，\u9700\u8981\u8fdb\u4e00\u6b65\u8f6c\u6362\u6210\u5b57\u7b26\u4e32 ，\u8fd9\u91cc\u4f7f\u7528Scanner\u53bb\u8bfb\u53d6\u53ef\u4ee5\u76f4\u63a5\u8f6c\u6362\u6210String\u7c7b\u578b：<\/p>\n

private void possess(Socket clientSocket) {
\n System.out.println("\u5ba2\u6237\u7aef\u4e0a\u7ebf");
\n try(InputStream inputStream = clientSocket.getInputStream();
\n OutputStream outputStream = clientSocket.getOutputStream()) {
\n Scanner scanner = new Scanner(inputStream);
\n while (true) {
\n String request = scanner.next();
\n }
\n }catch (IOException e) {
\n e.printStackTrace();
\n }
\n } <\/p>\n

\u4f7f\u7528Scanner\u7c7b\u8bfb\u53d6\u6570\u636e\u65f6，\u8bfb\u5230"\u7a7a\u767d\u7b26"(\u7a7a\u767d\u7b26\u662f\u4e00\u7c7b\u5b57\u7b26\u7684\u7edf\u79f0，\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u6362\u884c，\u56de\u8f66，\u7a7a\u683c，\u5236\u8868\u7b26，\u7ffb\u9875\u7b26\u7b49)\u624d\u4f1a\u8bfb\u53d6\u5b8c\u6bd5 ,\u5ba2\u6237\u7aef\u5728\u53d1\u9001\u6570\u636e\u65f6，\u52a1\u5fc5\u5728\u6bcf\u4e2a\u8bf7\u6c42\u7684\u672b\u5c3e\u52a0\u4e0a\u7a7a\u767d\u7b26\u3002<\/p>\n

\u7531\u4e8eTCP\u662f\u6309\u7167\u5b57\u8282\u6765\u4f20\u8f93\u7684，\u5728\u5b9e\u9645\u4f20\u8f93\u4e2d，\u5e94\u8be5\u4f7f\u82e5\u5e72\u4e2a\u5b57\u8282\u6784\u6210\u4e00\u4e2a\u201c\u5e94\u7528\u5c42\u7684\u6570\u636e\u62a5\u201d，\u6b64\u65f6\u5c31\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7a7a\u767d\u7b26\u4f5c\u4e3a\u201c\u5206\u5272\u7b26\u201d，\u6765\u533a\u5206\u4e0d\u540c\u7684\u6570\u636e\u62a5\u3002<\/p>\n

\u00a0\u5c06\u8bfb\u53d6\u7684\u8bf7\u6c42\u4ea4\u7ed9\u5904\u7406\u8bf7\u6c42\u7684\u51fd\u6570，\u4f7f\u7528\u7684\u662fprocess\u51fd\u6570，\u8fd9\u91cc\u5bf9\u8bf7\u6c42\u7684\u5904\u7406\u5b9e\u9645\u4e0a\u662f\u76f4\u63a5\u8fd4\u56de\u8bf7\u6c42（\u56de\u663e\u670d\u52a1\u5668）：<\/p>\n

String request = scanner.next();
\nString response = possessFun(request);
\noutputStream.write(response.getBytes()); <\/p>\n

\u5728\u8bfb\u53d6\u8bf7\u6c42\u4e4b\u524d，\u5e94\u8be5\u5224\u65ad\u6587\u4ef6\u662f\u5426\u6709\u8f93\u5165\u00a0，\u53ef\u4ee5\u5728\u8fdb\u5165while\u5faa\u73af\u4e4b\u540e\u4f7f\u7528if\u8bed\u53e5\u5224\u65ad\u8bf7\u6c42\u662f\u5426\u6709\u8f93\u5165，\u4f7f\u7528scanner\u7684next\u65b9\u6cd5\u6765\u5224\u65ad，\u8bf7\u6c42\u5230\u8fbe\u540e，\u5e76\u4e14\u5e26\u6709\u660e\u786e\u7684\u5206\u9694\u7b26\u5c31\u4f1a\u8fd4\u56detrue，\u5982\u679cTCP\u65ad\u5f00\u8fde\u63a5，\u5c31\u4f1a\u8fd4\u56defalse，\u4f7f\u7528scanner\u8bfb\u53d6\u5230\u6587\u4ef6\u672b\u5c3e\u6216\u8005TCP\u65ad\u5f00\u8fde\u63a5\u5c31\u4f1a\u8fd4\u56defalse，\u5426\u5219\u5c31\u4f1a\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u7ee7\u7eed\u53d1\u9001\u8bf7\u6c42：<\/p>\n

Tcp\u65ad\u5f00\u8fde\u63a5->\u963b\u585e\u89e3\u9664\u8fd4\u56defalse\u3002<\/p>\n

Tcp\u6ca1\u6709\u65ad\u5f00\u8fde\u63a5->\u5bf9\u65b9\u4eec\u6ca1\u6709\u53d1\u6570\u636e\u8fc7\u6765，\u963b\u585e\u7b49\u5f85\u3002<\/p>\n

\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42 -> \u63a5\u89e6\u963b\u585e\u5e76\u8fd4\u56detrue\u3002<\/p>\n

\u670d\u52a1\u5668\u5b8c\u6574\u4ee3\u7801：<\/p>\n

import java.io.IOException;
\nimport java.io.InputStream;
\nimport java.io.OutputStream;
\nimport java.net.ServerSocket;
\nimport java.net.Socket;
\nimport java.util.Scanner;<\/p>\n

public class TcpEchoServer {
\n private ServerSocket serverSocket = null;<\/p>\n

public TcpEchoServer(int port) throws IOException {
\n serverSocket = new ServerSocket(port);
\n }
\n public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8");
\n while (true) {
\n Socket socket = serverSocket.accept();
\n possess(socket);
\n }
\n }
\n private void possess(Socket clientSocket) {
\n System.out.println("\u5ba2\u6237\u7aef\u4e0a\u7ebf");
\n try(InputStream inputStream = clientSocket.getInputStream();
\n OutputStream outputStream = clientSocket.getOutputStream()) {
\n Scanner scanner = new Scanner(inputStream);
\n while (true) {
\n if(!scanner.hasNext()) {
\n System.out.println("\u5ba2\u6237\u7aef\u4e0b\u7ebf");
\n break;
\n }
\n String request = scanner.next();
\n String response = possessFun(request);
\n outputStream.write(response.getBytes());
\n }
\n }catch (IOException e) {
\n e.printStackTrace();
\n }
\n }
\n private String possessFun(String request) {
\n return request+" \\\\n";
\n }
\n} <\/p>\n

\u5ba2\u6237\u7aef<\/h3>\n

\u00a0\u5ba2\u6237\u7aef\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u5e94\u8be5\u6709\u670d\u52a1\u5668\u7684ip\u5730\u5740\u548c\u7aef\u53e3\u53f7，\u5728\u6784\u9020\u8fc7\u7a0b\u4e2d\u5c31\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n

private Socket socket = null;
\n public TcpClientSocket(String address,int port) throws IOException {
\n socket = new Socket(address,port);
\n } <\/p>\n

\u5efa\u7acbstart\u65b9\u6cd5\u53bb\u542f\u52a8\u5ba2\u6237\u7aef\u8f93\u5165\u8bf7\u6c42，\u540c\u6837\u4f7f\u7528try-catch\u8bed\u53e5\u5b9e\u4f8b\u5316\u5b57\u8282\u6d41\u5bf9\u8c61，\u4f7f\u7528Scanner\u5728\u63a7\u5236\u53f0\u4e0a\u8f93\u5165\u8bf7\u6c42，\u5c06\u63a5\u6536\u7684\u8bed\u53e5\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u4e4b\u524d\u4f7f\u7528\u2018\/n\u2019<\/span>\u4f5c\u4e3a\u5206\u5272\u7b26\u00a0，\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u4f7f\u7528OutputStream，\u4f20\u8f93\u7684\u5355\u4f4d\u662f\u5b57\u8282，\u5c06\u8bf7\u6c42\u8f6c\u6362\u4e3abyte\u8fdb\u884c\u53d1\u9001\u3002<\/p>\n

public void start() {
\n System.out.println("'\u5ba2\u6237\u7aef\u542f\u52a8");
\n try(InputStream inputStream = socket.getInputStream();
\n OutputStream outputStream = socket.getOutputStream()) {
\n Scanner scanner = new Scanner(System.in);
\n Scanner Rescanner = new Scanner(inputStream);
\n while (true) {
\n String request = scanner.next();
\n request += "\/n";
\n outputStream.write(request.getBytes());
\n }
\n } <\/p>\n

\u7136\u540e\u5982\u540c\u670d\u52a1\u5668\u4e00\u6837，\u5224\u65ad\u6765\u81ea\u670d\u52a1\u5668\u7684\u54cd\u5e94\u662f\u5426\u5230\u8fbe，\u4f7f\u7528scanner\u63a5\u6536\u54cd\u5e94，\u5728\u5c06\u63a5\u6536\u7684\u54cd\u5e94\u6253\u5370\u5230\u63a7\u5236\u53f0，\u5ba2\u6237\u7aef\u5c31\u5b8c\u6210\u7f16\u5199：<\/p>\n

import java.io.IOException;
\nimport java.io.InputStream;
\nimport java.io.OutputStream;
\nimport java.net.Socket;
\nimport java.util.Scanner;<\/p>\n

public class TcpClientSocket {
\n private Socket socket = null;
\n public TcpClientSocket(String address,int port) throws IOException {
\n socket = new Socket(address,port);
\n }
\n public void start() {
\n System.out.println("'\u5ba2\u6237\u7aef\u542f\u52a8");
\n try(InputStream inputStream = socket.getInputStream();
\n OutputStream outputStream = socket.getOutputStream()) {
\n Scanner scanner = new Scanner(System.in);
\n Scanner Rescanner = new Scanner(inputStream);
\n while (true) {
\n String request = scanner.next();
\n request += "\/n";
\n outputStream.write(request.getBytes());
\n if(!Rescanner.hasNext()) {
\n break;
\n }
\n String response = Rescanner.next();
\n System.out.println(response);
\n }
\n }catch (IOException e) {
\n e.printStackTrace();
\n }
\n }
\n} <\/p>\n

\u00a0\u6b65\u9aa4：<\/p>\n

\u00a01.\u5ba2\u6237\u7aef\u4ece\u63a7\u5236\u53f0\u5f97\u5230\u8bf7\u6c42\u30022.\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u670d\u52a1\u56683.\u670d\u52a1\u5668\u63a5\u6536\u8bf7\u6c424.\u670d\u52a1\u5668\u5904\u7406\u8bf7\u6c425\u670d\u52a1\u5668.\u5c06\u54cd\u5e94\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef6.\u5ba2\u6237\u7aef\u63a5\u6536\u54cd\u5e947.\u5c06\u54cd\u5e94\u8f93\u51fa\u5728\u63a7\u5236\u53f0\u3002<\/span><\/p>\n

\u4f18\u5316\u670d\u52a1\u5668<\/h2>\n

1.\u5173\u95ed\u670d\u52a1\u5668\u521b\u5efa\u7684socket\u5bf9\u8c61<\/h3>\n

serverrSocket\u4e0d\u9700\u8981\u7279\u522b\u5173\u95ed，\u56e0\u4e3a\u751f\u547d\u5468\u671f\u662f\u4f34\u968f\u6574\u4e2a\u670d\u52a1\u5668\u8fdb\u7a0b\u3002\u5ba2\u6237\u7aef\u7684socket\u4e5f\u662f\u5982\u6b64，\u4f46\u662f\u670d\u52a1\u5668\u7528\u4e8e\u63a5\u6536\u5ba2\u6237\u7aef\u4fe1\u606f\u7684socket\u5c31\u5fc5\u987b\u5173\u95ed，\u670d\u52a1\u5668\u4f1a\u5bf9\u5e94\u591a\u4e2a\u5ba2\u6237\u7aef，\u5982\u679c\u4f7f\u7528\u5b8c\u6bd5\u540e\u4e0d\u5173\u95ed\u5f53\u524d\u8d44\u6e90\u6587\u4ef6\u5f97\u4e0d\u5230\u91ca\u653e，\u5c31\u4f1a\u5f15\u8d77\u6587\u4ef6\u8d44\u6e90\u6cc4\u9732\u3002\u5728\u670d\u52a1\u5668\u4ee3\u7801\u4e2d\u52a0\u4e0afinally\u8bed\u53e5\u91ca\u653esocket\u5bf9\u8c61\u3002<\/p>\n

\"\"<\/p>\n

2.\u5f15\u5165\u7ebf\u7a0b\u6c60，\u4e3a\u591a\u4e2a\u5ba2\u6237\u7aef\u63d0\u4f9b\u670d\u52a1\u00a0<\/h3>\n

\u4e3b\u7ebf\u7a0b\u5904\u7406accept，\u6bcf\u6b21\u63a5\u6536\u4e00\u4e2aaccept\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u670d\u52a1，\u8fd9\u91cc\u4f7f\u7528\u53ef\u6269\u5bb9\u7684\u7ebf\u7a0b\u6c60：<\/p>\n

public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8");
\n \/\/\u81ea\u52a8\u6269\u5bb9\u7ebf\u7a0b\u6c60
\n ExecutorService pool = Executors.newCachedThreadPool();
\n while (true) {
\n Socket socket = serverSocket.accept();
\n pool.submit(new Runnable() {
\n @Override
\n public void run() {
\n try {
\n possess(socket);
\n } catch (IOException e) {
\n throw new RuntimeException(e);
\n }
\n }
\n });
\n }
\n } <\/p>\n

\u6587\u7ae0\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86，\u611f\u8c22\u89c2\u770b\u3002<\/span><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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