\u4e00\uff0c\u7f51\u7edc\u7f16\u7a0b\u4e2d\u4e24\u4e2a\u4e3b\u8981\u7684\u95ee\u9898
\n\u4e00\u4e2a\u662f\u5982\u4f55\u51c6\u786e\u7684\u5b9a\u4f4d\u7f51\u7edc\u4e0a\u4e00\u53f0\u6216\u591a\u53f0\u4e3b\u673a\uff0c\u53e6\u4e00\u4e2a\u5c31\u662f\u627e\u5230\u4e3b\u673a\u540e\u5982\u4f55\u53ef\u9760\u9ad8\u6548\u7684\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002
\n\u5728TCP\/IP\u534f\u8bae\u4e2dIP\u5c42\u4e3b\u8981\u8d1f\u8d23\u7f51\u7edc\u4e3b\u673a\u7684\u5b9a\u4f4d\uff0c\u6570\u636e\u4f20\u8f93\u7684\u8def\u7531\uff0c\u7531IP\u5730\u5740\u53ef\u4ee5\u552f\u4e00\u5730\u786e\u5b9aInternet\u4e0a\u7684\u4e00\u53f0\u4e3b\u673a\u3002
\n<\/p>\n
\u800cTCP\u5c42\u5219\u63d0\u4f9b\u9762\u5411\u5e94\u7528\u7684\u53ef\u9760\uff08tcp\uff09\u7684\u6216\u975e\u53ef\u9760\uff08UDP\uff09\u7684\u6570\u636e\u4f20\u8f93\u673a\u5236\uff0c\u8fd9\u662f\u7f51\u7edc\u7f16\u7a0b\u7684\u4e3b\u8981\u5bf9\u8c61\uff0c\u4e00\u822c\u4e0d\u9700\u8981\u5173\u5fc3IP\u5c42\u662f\u5982\u4f55\u5904\u7406\u6570\u636e\u7684\u3002
\n\u76ee\u524d\u8f83\u4e3a\u6d41\u884c\u7684\u7f51\u7edc\u7f16\u7a0b\u6a21\u578b\u662f\u5ba2\u6237\u673a\/\u670d\u52a1\u5668\uff08C\/S\uff09\u7ed3\u6784\u3002\u5373\u901a\u4fe1\u53cc\u65b9\u4e00\u65b9\u4f5c\u4e3a\u670d\u52a1\u5668\u7b49\u5f85\u5ba2\u6237\u63d0\u51fa\u8bf7\u6c42\u5e76\u4e88\u4ee5\u54cd\u5e94\u3002\u5ba2\u6237\u5219\u5728\u9700\u8981\u670d\u52a1\u65f6\u5411\u670d\u52a1\u5668\u63d0\u51fa\u7533\u8bf7\u3002\u670d\u52a1\u5668\u4e00\u822c\u4f5c\u4e3a\u5b88\u62a4\u8fdb\u7a0b\u59cb\u7ec8\u8fd0\u884c\uff0c\u76d1\u542c\u7f51\u7edc\u7aef\u53e3\uff0c\u4e00\u65e6\u6709\u5ba2\u6237\u8bf7\u6c42\uff0c\u5c31\u4f1a\u542f\u52a8\u4e00\u4e2a\u670d\u52a1\u8fdb\u7a0b\u6765\u54cd\u5e94\u8be5\u5ba2\u6237\uff0c\u540c\u65f6\u81ea\u5df1\u7ee7\u7eed\u76d1\u542c\u670d\u52a1\u7aef\u53e3\uff0c\u4f7f\u540e\u6765\u7684\u5ba2\u6237\u4e5f\u80fd\u53ca\u65f6\u5f97\u5230\u670d\u52a1\u3002<\/p>\n
\u4e8c\uff0c\u4e24\u7c7b\u4f20\u8f93\u534f\u8bae\uff1aTCP\uff1bUDP
\nTCP\u662fTranfer Control Protocol\u7684 \u7b80\u79f0\uff0c\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u4fdd\u8bc1\u53ef\u9760\u4f20\u8f93\u7684\u534f\u8bae\u3002\u901a\u8fc7TCP\u534f\u8bae\u4f20\u8f93\uff0c\u5f97\u5230\u7684\u662f\u4e00\u4e2a\u987a\u5e8f\u7684\u65e0\u5dee\u9519\u7684\u6570\u636e\u6d41\u3002\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u7684\u6210\u5bf9\u7684\u4e24\u4e2asocket\u4e4b\u95f4\u5fc5\u987b\u5efa \u7acb\u8fde\u63a5\uff0c\u4ee5\u4fbf\u5728TCP\u534f\u8bae\u7684\u57fa\u7840\u4e0a\u8fdb\u884c\u901a\u4fe1\uff0c\u5f53\u4e00\u4e2asocket\uff08\u901a\u5e38\u90fd\u662fserver socket\uff09\u7b49\u5f85\u5efa\u7acb\u8fde\u63a5\u65f6\uff0c\u53e6\u4e00\u4e2asocket\u53ef\u4ee5\u8981\u6c42\u8fdb\u884c\u8fde\u63a5\uff0c\u4e00\u65e6\u8fd9\u4e24\u4e2asocket\u8fde\u63a5\u8d77\u6765\uff0c\u5b83\u4eec\u5c31\u53ef\u4ee5\u8fdb\u884c\u53cc\u5411\u6570\u636e\u4f20\u8f93\uff0c\u53cc\u65b9\u90fd\u53ef\u4ee5\u8fdb\u884c\u53d1\u9001\u6216\u63a5\u6536\u64cd\u4f5c\u3002
\nUDP\u662fUser Datagram Protocol\u7684\u7b80\u79f0\uff0c\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u534f\u8bae\uff0c\u6bcf\u4e2a\u6570\u636e\u62a5\u90fd\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u5b8c\u6574\u7684\u6e90\u5730\u5740\u6216\u76ee\u7684\u5730\u5740\uff0c\u5b83\u5728\u7f51\u7edc\u4e0a\u4ee5\u4efb\u4f55\u53ef\u80fd\u7684\u8def\u5f84\u4f20\u5f80\u76ee\u7684\u5730\uff0c\u56e0\u6b64\u80fd\u5426\u5230\u8fbe\u76ee\u7684\u5730\uff0c\u5230\u8fbe\u76ee\u7684\u5730\u7684\u65f6\u95f4\u4ee5\u53ca\u5185\u5bb9\u7684\u6b63\u786e\u6027\u90fd\u662f\u4e0d\u80fd\u88ab\u4fdd\u8bc1\u7684\u3002<\/p>\n
\u6bd4\u8f83\uff1a
\nUDP\uff1a
\n1\uff0c\u6bcf\u4e2a\u6570\u636e\u62a5\u4e2d\u90fd\u7ed9\u51fa\u4e86\u5b8c\u6574\u7684\u5730\u5740\u4fe1\u606f\uff0c\u56e0\u6b64\u65e0\u9700\u8981\u5efa\u7acb\u53d1\u9001\u65b9\u548c\u63a5\u6536\u65b9\u7684\u8fde\u63a5\u3002
\n2\uff0cUDP\u4f20\u8f93\u6570\u636e\u65f6\u662f\u6709\u5927\u5c0f\u9650\u5236\u7684\uff0c\u6bcf\u4e2a\u88ab\u4f20\u8f93\u7684\u6570\u636e\u62a5\u5fc5\u987b\u9650\u5b9a\u572864KB\u4e4b\u5185\u3002
\n3\uff0cUDP\u662f\u4e00\u4e2a\u4e0d\u53ef\u9760\u7684\u534f\u8bae\uff0c\u53d1\u9001\u65b9\u6240\u53d1\u9001\u7684\u6570\u636e\u62a5\u5e76\u4e0d\u4e00\u5b9a\u4ee5\u76f8\u540c\u7684\u6b21\u5e8f\u5230\u8fbe\u63a5\u6536\u65b9
\nTCP\uff1a
\n1\uff0c\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\uff0c\u5728socket\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u4e4b\u524d\u5fc5\u7136\u8981\u5efa\u7acb\u8fde\u63a5\uff0c\u6240\u4ee5\u5728TCP\u4e2d\u9700\u8981\u8fde\u63a5\u65f6\u95f4\u3002
\n2\uff0cTCP\u4f20\u8f93\u6570\u636e\u5927\u5c0f\u9650\u5236\uff0c\u4e00\u65e6\u8fde\u63a5\u5efa\u7acb\u8d77\u6765\uff0c\u53cc\u65b9\u7684socket\u5c31\u53ef\u4ee5\u6309\u7edf\u4e00\u7684\u683c\u5f0f\u4f20\u8f93\u5927\u7684\u6570\u636e\u3002
\n3\uff0cTCP\u662f\u4e00\u4e2a\u53ef\u9760\u7684\u534f\u8bae\uff0c\u5b83\u786e\u4fdd\u63a5\u6536\u65b9\u5b8c\u5168\u6b63\u786e\u5730\u83b7\u53d6\u53d1\u9001\u65b9\u6240\u53d1\u9001\u7684\u5168\u90e8\u6570\u636e\u3002<\/p>\n
\u5e94\u7528\uff1a
\n1\uff0cTCP\u5728\u7f51\u7edc\u901a\u4fe1\u4e0a\u6709\u6781\u5f3a\u7684\u751f\u547d\u529b\uff0c\u4f8b\u5982\u8fdc\u7a0b\u8fde\u63a5\uff08Telnet\uff09\u548c\u6587\u4ef6\u4f20\u8f93\uff08FTP\uff09\u90fd\u9700\u8981\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u636e\u88ab\u53ef\u9760\u5730\u4f20\u8f93\u3002\u4f46\u662f\u53ef\u9760\u7684\u4f20\u8f93\u662f\u8981\u4ed8\u51fa\u4ee3\u4ef7\u7684\uff0c\u5bf9\u6570\u636e\u5185\u5bb9\u6b63\u786e\u6027\u7684\u68c0\u9a8c\u5fc5\u7136\u5360\u7528\u8ba1\u7b97\u673a\u7684\u5904\u7406\u65f6\u95f4\u548c\u7f51\u7edc\u7684\u5e26\u5bbd\u3002
\n2\uff0cUDP\u64cd\u4f5c\u7b80\u5355\uff0c\u800c\u4e14\u4ec5\u9700\u8981\u8f83\u5c11\u7684\u76d1\u62a4\uff0c\u56e0\u6b64\u901a\u5e38\u7528\u4e8e\u5c40\u57df\u7f51\u9ad8\u53ef\u9760\u6027\u7684\u5206\u6563\u7cfb\u7edf\u4e2dclient\/server\u5e94\u7528\u7a0b\u5e8f\u3002\u4f8b\u5982\u89c6\u9891\u4f1a\u8bae\u7cfb\u7edf\uff0c\u5e76\u4e0d\u8981\u6c42\u97f3\u9891\u89c6\u9891\u6570\u636e\u7edd\u5bf9\u7684\u6b63\u786e\uff0c\u53ea\u8981\u4fdd\u8bc1\u8fde\u8d2f\u6027\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u663e\u7136\u4f7f\u7528UDP\u4f1a\u66f4\u5408\u7406\u4e00\u4e9b\u3002<\/p>\n
\u4e09\uff0c\u57fa\u4e8eSocket\u7684java\u7f51\u7edc\u7f16\u7a0b
\n1\uff0c\u4ec0\u4e48\u662fSocket
\n\u7f51\u7edc\u4e0a\u7684\u4e24\u4e2a\u7a0b\u5e8f\u901a\u8fc7\u4e00\u4e2a\u53cc\u5411\u7684\u901a\u8baf\u8fde\u63a5\u5b9e\u73b0\u6570\u636e\u7684\u4ea4\u6362\uff0c\u8fd9\u4e2a\u53cc\u5411\u94fe\u8def\u7684\u4e00\u7aef\u79f0\u4e3a\u4e00\u4e2aSocket\u3002Socket\u901a\u5e38\u7528\u6765\u5b9e\u73b0\u5ba2\u6237\u65b9\u548c\u670d\u52a1\u65b9\u7684\u8fde\u63a5\u3002Socket\u662fTCP\/IP\u534f\u8bae\u7684\u4e00\u4e2a\u5341\u5206\u6d41\u884c\u7684\u7f16\u7a0b\u754c\u9762\uff0c\u4e00\u4e2aSocket\u7531\u4e00\u4e2aIP\u5730\u5740\u548c\u4e00\u4e2a\u7aef\u53e3\u53f7\u552f\u4e00\u786e\u5b9a\u3002
\n\u4f46\u662f\uff0cSocket\u6240\u652f\u6301\u7684\u534f\u8bae\u79cd\u7c7b\u4e5f\u4e0d\u5149TCP\/IP\u4e00\u79cd\uff0c\u56e0\u6b64\u4e24\u8005\u4e4b\u95f4\u662f\u6ca1\u6709\u5fc5\u7136\u8054\u7cfb\u7684\u3002\u5728Java\u73af\u5883\u4e0b\uff0cSocket\u7f16\u7a0b\u4e3b\u8981\u662f\u6307\u57fa\u4e8eTCP\/IP\u534f\u8bae\u7684\u7f51\u7edc\u7f16\u7a0b\u3002<\/p>\n
2\uff0cSocket\u901a\u8baf\u7684\u8fc7\u7a0b
\nServer \u7aefListen(\u76d1\u542c)\u67d0\u4e2a\u7aef\u53e3\u662f\u5426\u6709\u8fde\u63a5\u8bf7\u6c42\uff0cClient\u7aef\u5411Server \u7aef\u53d1\u51faConnect(\u8fde\u63a5)\u8bf7\u6c42\uff0cServer\u7aef\u5411Client\u7aef\u53d1\u56deAccept\uff08\u63a5\u53d7\uff09\u6d88\u606f\u3002\u4e00\u4e2a\u8fde\u63a5\u5c31\u5efa\u7acb\u8d77\u6765\u4e86\u3002Server\u7aef\u548cClient \u7aef\u90fd\u53ef\u4ee5\u901a\u8fc7Send\uff0cWrite\u7b49\u65b9\u6cd5\u4e0e\u5bf9\u65b9\u901a\u4fe1\u3002
\n\u5bf9\u4e8e\u4e00\u4e2a\u529f\u80fd\u9f50\u5168\u7684Socket\uff0c\u90fd\u8981\u5305\u542b\u4ee5\u4e0b\u57fa\u672c\u7ed3\u6784\uff0c\u5176\u5de5\u4f5c\u8fc7\u7a0b\u5305\u542b\u4ee5\u4e0b\u56db\u4e2a\u57fa\u672c\u7684\u6b65\u9aa4\uff1a
\n\u3000\u3000\uff081\uff09 \u521b\u5efaSocket\uff1b
\n\u3000\u3000\uff082\uff09 \u6253\u5f00\u8fde\u63a5\u5230Socket\u7684\u8f93\u5165\/\u51fa\u6d41\uff1b
\n\u3000\u3000\uff083\uff09 \u6309\u7167\u4e00\u5b9a\u7684\u534f\u8bae\u5bf9Socket\u8fdb\u884c\u8bfb\/\u5199\u64cd\u4f5c\uff1b
\n\t\uff084\uff09 \u5173\u95edSocket.\uff08\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5e76\u672a\u4f7f\u7528\u5230\u663e\u793a\u7684close\uff0c\u867d\u7136\u5f88\u591a\u6587\u7ae0\u90fd\u63a8\u8350\u5982\u6b64\uff0c\u4e0d\u8fc7\u5728\u6211\u7684\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u80fd\u56e0\u4e3a\u7a0b\u5e8f\u672c\u8eab\u6bd4\u8f83\u7b80\u5355\uff0c\u8981\u6c42\u4e0d\u9ad8\uff0c\u6240\u4ee5\u5e76\u672a\u9020\u6210\u4ec0\u4e48\u5f71\u54cd\u3002\uff09<\/p>\n
3\uff0c\u521b\u5efaSocket
\njava\u5728\u5305java.net\u4e2d\u63d0\u4f9b\u4e86\u4e24\u4e2a\u7c7bSocket\u548cServerSocket\uff0c\u5206\u522b\u7528\u6765\u8868\u793a\u53cc\u5411\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u3002\u8fd9\u662f\u4e24\u4e2a\u5c01\u88c5\u5f97\u975e\u5e38\u597d\u7684\u7c7b\uff0c\u4f7f\u7528\u5f88\u65b9\u4fbf\u3002\u5176\u6784\u9020\u65b9\u6cd5\u5982\u4e0b\uff1a
\n\u3000\u3000[java]Socket(InetAddress address, int port);
\n\u3000\u3000Socket(InetAddress address, int port, boolean stream);
\n\u3000\u3000Socket(String host, int prot);
\n\u3000\u3000Socket(String host, int prot, boolean stream);
\n\u3000\u3000Socket(SocketImpl impl)
\n\u3000\u3000Socket(String host, int port, InetAddress localAddr, int localPort)
\n\u3000\u3000Socket(InetAddress address, int port, InetAddress localAddr, int localPort)
\n\u3000\u3000ServerSocket(int port);
\n\u3000\u3000ServerSocket(int port, int backlog);
\n\u3000\u3000ServerSocket(int port, int backlog, InetAddress bindAddr)[\/java]
\n\u3000\u3000\u5176\u4e2daddress\u3001host\u548cport\u5206\u522b\u662f\u53cc\u5411\u8fde\u63a5\u4e2d\u53e6\u4e00\u65b9\u7684IP\u5730\u5740\u3001\u4e3b\u673a\u540d\u548c\u7aef\u53e3\u53f7\uff0cstream\u6307\u660esocket\u662f\u6d41socket\u8fd8\u662f\u6570\u636e\u62a5socket\uff0clocalPort\u8868\u793a\u672c\u5730\u4e3b\u673a\u7684\u7aef\u53e3\u53f7\uff0clocalAddr\u548c bindAddr\u662f\u672c\u5730\u673a\u5668\u7684\u5730\u5740\uff08ServerSocket\u7684\u4e3b\u673a\u5730\u5740\uff09\uff0cimpl\u662fsocket\u7684\u7236\u7c7b\uff0c\u65e2\u53ef\u4ee5\u7528\u6765\u521b\u5efaserverSocket\u53c8\u53ef\u4ee5\u7528\u6765\u521b\u5efaSocket\u3002count\u5219\u8868\u793a\u670d\u52a1\u7aef\u6240\u80fd\u652f\u6301\u7684\u6700\u5927\u8fde\u63a5\u6570\u3002\u4f8b\u5982\uff1a
\n\u3000\u3000Socket client = new Socket(“127.0.01.”, 80);
\n\u3000\u3000ServerSocket server = new ServerSocket(80);
\n\u3000\u3000\u6ce8\u610f\uff0c\u5728\u9009\u62e9\u7aef\u53e3\u65f6\uff0c\u5fc5\u987b\u5c0f\u5fc3\u3002\u6bcf\u4e00\u4e2a\u7aef\u53e3\u63d0\u4f9b\u4e00\u79cd\u7279\u5b9a\u7684\u670d\u52a1\uff0c\u53ea\u6709\u7ed9\u51fa\u6b63\u786e\u7684\u7aef\u53e3\uff0c\u624d\u80fd\u83b7\u5f97\u76f8\u5e94\u7684\u670d\u52a1\u30020~1023\u7684\u7aef\u53e3\u53f7\u4e3a\u7cfb\u7edf\u6240\u4fdd\u7559\uff0c\u4f8b\u5982http\u670d\u52a1\u7684\u7aef\u53e3\u53f7\u4e3a80,telnet\u670d\u52a1\u7684\u7aef\u53e3\u53f7\u4e3a21,ftp\u670d\u52a1\u7684\u7aef\u53e3\u53f7\u4e3a23, \u6240\u4ee5\u6211\u4eec\u5728\u9009\u62e9\u7aef\u53e3\u53f7\u65f6\uff0c\u6700\u597d\u9009\u62e9\u4e00\u4e2a\u5927\u4e8e1023\u7684\u6570\u4ee5\u9632\u6b62\u53d1\u751f\u51b2\u7a81\u3002
\n\t\u5728\u521b\u5efasocket\u65f6\u5982\u679c\u53d1\u751f\u9519\u8bef\uff0c\u5c06\u4ea7\u751fIOException\uff0c\u5728\u7a0b\u5e8f\u4e2d\u5fc5\u987b\u5bf9\u4e4b\u4f5c\u51fa\u5904\u7406\u3002\u6240\u4ee5\u5728\u521b\u5efaSocket\u6216ServerSocket\u662f\u5fc5\u987b\u6355\u83b7\u6216\u629b\u51fa\u4f8b\u5916\u3002<\/p>\n
4\uff0c\u7b80\u5355\u7684Client\/Server\u7a0b\u5e8f
\n1. \u5ba2\u6237\u7aef\u7a0b\u5e8f
\n\u3000\u3000[java]import java.io.*;
\n\u3000\u3000import java.net.*;
\n\u3000\u3000public class TalkClient {
\n\u3000\u3000\u3000\u3000public static void main(String args[]) {
\n\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000Socket socket=new Socket("127.0.0.1",4700);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5411\u672c\u673a\u76844700\u7aef\u53e3\u53d1\u51fa\u5ba2\u6237\u8bf7\u6c42
\n\u3000\u3000\u3000\u3000 BufferedReader sin=
\n new BufferedReader(new InputStreamReader(System.in));
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bbe\u5907\u6784\u9020BufferedReader\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000PrintWriter os=new PrintWriter(socket.getOutputStream());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531Socket\u5bf9\u8c61\u5f97\u5230\u8f93\u51fa\u6d41\uff0c\u5e76\u6784\u9020PrintWriter\u5bf9\u8c61
\n\u3000 BufferedReader s=new BufferedReader(
\n new InputStreamReader(socket.getInputStream()));
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531Socket\u5bf9\u8c61\u5f97\u5230\u8f93\u5165\u6d41\uff0c\u5e76\u6784\u9020\u76f8\u5e94\u7684BufferedReader\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000String readline;
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000readline=sin.readLine(); \/\/\u4ece\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000while(!readline.equals("bye")){
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u82e5\u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u7684\u5b57\u7b26\u4e32\u4e3a "bye"\u5219\u505c\u6b62\u5faa\u73af
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.println(readline);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5c06\u4ece\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u7684\u5b57\u7b26\u4e32\u8f93\u51fa\u5230Server
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.flush();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5237\u65b0\u8f93\u51fa\u6d41\uff0c\u4f7fServer\u9a6c\u4e0a\u6536\u5230\u8be5\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Client:"+readline);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5728\u7cfb\u7edf\u6807\u51c6\u8f93\u51fa\u4e0a\u6253\u5370\u8bfb\u5165\u7684\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Server:"+is.readLine());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u4eceServer\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32\uff0c\u5e76\u6253\u5370\u5230\u6807\u51c6\u8f93\u51fa\u4e0a
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000readline=sin.readLine(); \/\/\u4ece\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000} \/\/\u7ee7\u7eed\u5faa\u73af
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.close(); \/\/\u5173\u95edSocket\u8f93\u51fa\u6d41
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000is.close(); \/\/\u5173\u95edSocket\u8f93\u5165\u6d41
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000socket.close(); \/\/\u5173\u95edSocket
\n\u3000\u3000\u3000\u3000\u3000\u3000}catch(Exception e) {
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Error"+e); \/\/\u51fa\u9519\uff0c\u5219\u6253\u5370\u51fa\u9519\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000\u3000}
\n\u3000\u3000}
\n}[\/java]
\n\u30002. \u670d\u52a1\u5668\u7aef\u7a0b\u5e8f
\n\u3000[java]\u3000import java.io.*;
\n\u3000\u3000import java.net.*;
\n\u3000\u3000import java.applet.Applet;
\n\u3000\u3000public class TalkServer{
\n\u3000\u3000\u3000\u3000public static void main(String args[]) {
\n\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000ServerSocket server=null;
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000server=new ServerSocket(4700);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa\u4e00\u4e2aServerSocket\u5728\u7aef\u53e34700\u76d1\u542c\u5ba2\u6237\u8bf7\u6c42
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}catch(Exception e) {
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("can not listen to:"+e);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u51fa\u9519\uff0c\u6253\u5370\u51fa\u9519\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000Socket socket=null;
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000socket=server.accept();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u4f7f\u7528accept()\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u8bf7\u6c42\uff0c\u6709\u5ba2\u6237
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u8bf7\u6c42\u5230\u6765\u5219\u4ea7\u751f\u4e00\u4e2aSocket\u5bf9\u8c61\uff0c\u5e76\u7ee7\u7eed\u6267\u884c
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}catch(Exception e) {
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Error."+e);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u51fa\u9519\uff0c\u6253\u5370\u51fa\u9519\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000String line;
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000BufferedReader is=new BufferedReader(
\n new InputStreamReader(socket.getInputStream()));
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531Socket\u5bf9\u8c61\u5f97\u5230\u8f93\u5165\u6d41\uff0c\u5e76\u6784\u9020\u76f8\u5e94\u7684BufferedReader\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000PrintWriter os=new PrintWriter(socket.getOutputStream());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531Socket\u5bf9\u8c61\u5f97\u5230\u8f93\u51fa\u6d41\uff0c\u5e76\u6784\u9020PrintWriter\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000BufferedReader sin=
\n new BufferedReader(new InputStreamReader(System.in));
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bbe\u5907\u6784\u9020BufferedReader\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Client:"+is.readLine());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5728\u6807\u51c6\u8f93\u51fa\u4e0a\u6253\u5370\u4ece\u5ba2\u6237\u7aef\u8bfb\u5165\u7684\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000line=sin.readLine();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000while(!line.equals("bye")){
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5982\u679c\u8be5\u5b57\u7b26\u4e32\u4e3a "bye"\uff0c\u5219\u505c\u6b62\u5faa\u73af
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.println(line);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5411\u5ba2\u6237\u7aef\u8f93\u51fa\u8be5\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.flush();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5237\u65b0\u8f93\u51fa\u6d41\uff0c\u4f7fClient\u9a6c\u4e0a\u6536\u5230\u8be5\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Server:"+line);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5728\u7cfb\u7edf\u6807\u51c6\u8f93\u51fa\u4e0a\u6253\u5370\u8bfb\u5165\u7684\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Client:"+is.readLine());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u4eceClient\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32\uff0c\u5e76\u6253\u5370\u5230\u6807\u51c6\u8f93\u51fa\u4e0a
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000line=sin.readLine();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u4ece\u7cfb\u7edf\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u4e00\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000} \u3000\/\/\u7ee7\u7eed\u5faa\u73af
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000os.close(); \/\/\u5173\u95edSocket\u8f93\u51fa\u6d41
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000is.close(); \/\/\u5173\u95edSocket\u8f93\u5165\u6d41
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000socket.close(); \/\/\u5173\u95edSocket
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000server.close(); \/\/\u5173\u95edServerSocket
\n\u3000\u3000\u3000\u3000\u3000\u3000}catch(Exception e){
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Error:"+e);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u51fa\u9519\uff0c\u6253\u5370\u51fa\u9519\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000}
\n\u3000\u3000}[\/java]
\n5\uff0c\u652f\u6301\u591a\u5ba2\u6237\u7684client\/server\u7a0b\u5e8f
\n\u524d\u9762\u7684Client\/Server\u7a0b\u5e8f\u53ea\u80fd\u5b9e\u73b0Server\u548c\u4e00\u4e2a\u5ba2\u6237\u7684\u5bf9\u8bdd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5f80\u5f80\u662f\u5728\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\u4e00\u4e2a\u6c38\u4e45\u7684\u7a0b\u5e8f\uff0c\u5b83\u53ef\u4ee5\u63a5\u6536\u6765\u81ea\u5176\u4ed6\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u63d0\u4f9b\u76f8\u5e94\u7684\u670d\u52a1\u3002\u4e3a\u4e86\u5b9e\u73b0\u5728\u670d\u52a1\u5668\u65b9\u7ed9\u591a\u4e2a\u5ba2\u6237\u63d0\u4f9b\u670d\u52a1\u7684\u529f\u80fd\uff0c\u9700\u8981\u5bf9\u4e0a\u9762\u7684\u7a0b\u5e8f\u8fdb\u884c\u6539\u9020\uff0c\u5229\u7528\u591a\u7ebf\u7a0b\u5b9e\u73b0\u591a\u5ba2\u6237\u673a\u5236\u3002\u670d\u52a1\u5668\u603b\u662f\u5728\u6307\u5b9a\u7684\u7aef\u53e3\u4e0a\u76d1\u542c\u662f\u5426\u6709\u5ba2\u6237\u8bf7\u6c42\uff0c\u4e00\u65e6\u76d1\u542c\u5230\u5ba2\u6237\u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u5c31\u4f1a\u542f\u52a8\u4e00\u4e2a\u4e13\u95e8\u7684\u670d\u52a1\u7ebf\u7a0b\u6765\u54cd\u5e94\u8be5\u5ba2\u6237\u7684\u8bf7\u6c42\uff0c\u800c\u670d\u52a1\u5668\u672c\u8eab\u5728\u542f\u52a8\u5b8c\u7ebf\u7a0b\u4e4b\u540e\u9a6c\u4e0a\u53c8\u8fdb\u5165\u76d1\u542c\u72b6\u6001\uff0c\u7b49\u5f85\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7684\u5230\u6765\u3002
\n[java]ServerSocket serverSocket=null;
\n\u3000\u3000\u3000\u3000boolean listening=true;
\n\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000serverSocket=new ServerSocket(4700);
\n\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa\u4e00\u4e2aServerSocket\u5728\u7aef\u53e34700\u76d1\u542c\u5ba2\u6237\u8bf7\u6c42
\n\u3000\u3000\u3000\u3000}catch(IOException e) {\u3000\u3000}
\n\u3000\u3000\u3000\u3000while(listening){ \/\/\u6c38\u8fdc\u5faa\u73af\u76d1\u542c
\n\u3000\u3000\u3000\u3000\u3000\u3000new ServerThread(serverSocket.accept(),clientnum).start();
\n\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u76d1\u542c\u5230\u5ba2\u6237\u8bf7\u6c42\uff0c\u6839\u636e\u5f97\u5230\u7684Socket\u5bf9\u8c61\u548c
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u5ba2\u6237\u8ba1\u6570\u521b\u5efa\u670d\u52a1\u7ebf\u7a0b\uff0c\u5e76\u542f\u52a8\u4e4b
\n\u3000\u3000\u3000\u3000\u3000\u3000clientnum++; \/\/\u589e\u52a0\u5ba2\u6237\u8ba1\u6570
\n\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000serverSocket.close(); \/\/\u5173\u95edServerSocket[\/java]
\n\u8bbe\u8ba1ServerThread\u7c7b
\n\u3000[java]public class ServerThread extends Thread{
\n\u3000\u3000\u3000Socket socket=null; \/\/\u4fdd\u5b58\u4e0e\u672c\u7ebf\u7a0b\u76f8\u5173\u7684Socket\u5bf9\u8c61
\n\u3000\u3000\u3000int clientnum; \/\/\u4fdd\u5b58\u672c\u8fdb\u7a0b\u7684\u5ba2\u6237\u8ba1\u6570
\n\u3000\u3000\u3000public ServerThread(Socket socket,int num) { \/\/\u6784\u9020\u51fd\u6570
\n\u3000\u3000\u3000\u3000this.socket=socket; \/\/\u521d\u59cb\u5316socket\u53d8\u91cf
\n\u3000\u3000\u3000\u3000clientnum=num+1; \/\/\u521d\u59cb\u5316clientnum\u53d8\u91cf
\n\u3000\u3000\u3000}
\n\u3000\u3000\u3000public void run() { \/\/\u7ebf\u7a0b\u4e3b\u4f53
\n\u3000\u3000\u3000\u3000try{\/\/\u5728\u8fd9\u91cc\u5b9e\u73b0\u6570\u636e\u7684\u63a5\u53d7\u548c\u53d1\u9001}[\/java]<\/p>\n
\u56db\uff0cDatagram\u901a\u8baf
\n\u5728TCP\/IP\u534f\u8bae\u7684\u4f20\u8f93\u5c42\u9664\u4e86TCP\u534f\u8bae\u4e4b\u5916\u8fd8\u6709\u4e00\u4e2aUDP\u534f\u8bae\uff0c\u76f8\u6bd4\u800c\u8a00UDP\u7684\u5e94\u7528\u4e0d\u5982TCP\u5e7f\u6cdb\uff0c\u51e0\u4e2a\u6807\u51c6\u7684\u5e94\u7528\u5c42\u534f\u8baeHTTP\uff0cFTP\uff0cSMTP\u2026\u4f7f\u7528\u7684\u90fd\u662fTCP\u534f\u8bae\u3002\u4f46\u662f\uff0cUDP\u534f\u8bae\u53ef\u4ee5\u5e94\u7528\u5728\u9700\u8981\u5f88\u5f3a\u7684\u5b9e\u65f6\u4ea4\u4e92\u6027\u7684\u573a\u5408\uff0c\u5982\u7f51\u7edc\u6e38\u620f\uff0c\u89c6\u9891\u4f1a\u8bae\u7b49\u3002
\n1\uff0c\u4ec0\u4e48\u662fDatagram
\n\u6570\u636e\u62a5\uff08Datagram\uff09\u5c31\u8ddf\u65e5\u5e38\u751f\u6d3b\u4e2d\u7684\u90ae\u4ef6\u7cfb\u7edf\u4e00\u6837\uff0c\u662f\u4e0d\u80fd\u4fdd\u8bc1\u53ef\u9760\u7684\u5bc4\u5230\u7684\uff0c\u800c\u9762\u5411\u94fe\u63a5\u7684TCP\u5c31\u597d\u6bd4\u7535\u8bdd\uff0c\u53cc\u65b9\u80fd\u80af\u5b9a\u5bf9\u65b9\u63a5\u53d7\u5230\u4e86\u4fe1\u606f\u3002
\nTCP\uff0c\u53ef\u9760\uff0c\u4f20\u8f93\u5927\u5c0f\u65e0\u9650\u5236\uff0c\u4f46\u662f\u9700\u8981\u8fde\u63a5\u5efa\u7acb\u65f6\u95f4\uff0c\u5dee\u9519\u63a7\u5236\u5f00\u9500\u5927\u3002
\nUDP\uff0c\u4e0d\u53ef\u9760\uff0c\u5dee\u9519\u63a7\u5236\u5f00\u9500\u8f83\u5c0f\uff0c\u4f20\u8f93\u5927\u5c0f\u9650\u5236\u572864K\u4ee5\u4e0b\uff0c\u4e0d\u9700\u8981\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n
2\uff0cDatagram\u4f7f\u7528
\n\u5305java.net\u4e2d\u63d0\u4f9b\u4e86\u4e24\u4e2a\u7c7bDatagramSocket\u548cDatagramPacket\u7528\u6765\u652f\u6301\u6570\u636e\u62a5\u901a\u4fe1\uff0cDatagramSocket\u7528\u4e8e\u5728\u7a0b\u5e8f\u4e4b\u95f4\u5efa\u7acb\u4f20\u9001\u6570\u636e\u62a5\u7684\u901a\u4fe1\u8fde\u63a5\uff0c DatagramPacket\u5219\u7528\u6765\u8868\u793a\u4e00\u4e2a\u6570\u636e\u62a5\u3002
\nDatagramSocket\u7684\u6784\u9020\u65b9\u6cd5\uff1a
\n [java] DatagramSocket\uff08\uff09\uff1b
\n\u3000\u3000\u3000DatagramSocket\uff08int prot\uff09;
\n\u3000\u3000\u3000DatagramSocket(int port, InetAddress laddr)[\/java]
\n\u5176\u4e2d\uff0cport\u6307\u660esocket\u6240\u4f7f\u7528\u7684\u7aef\u53e3\u53f7\uff0c\u5982\u679c\u672a\u6307\u660e\u7aef\u53e3\u53f7\uff0c\u5219\u628asocket\u8fde\u63a5\u5230\u672c\u5730\u4e3b\u673a\u4e0a\u4e00\u4e2a\u53ef\u7528\u7684\u7aef\u53e3\u3002laddr\u6307\u660e\u4e00\u4e2a\u53ef\u7528\u7684\u672c\u5730\u5730\u5740\u3002\u7ed9\u51fa\u7aef\u53e3\u53f7\u65f6\u8981\u4fdd\u8bc1\u4e0d\u53d1\u751f\u7aef\u53e3\u51b2\u7a81\uff0c\u5426\u5219\u4f1a\u751f\u6210SocketException\u7c7b\u4f8b\u5916\u3002\u6ce8\u610f\uff1a\u4e0a\u8ff0\u7684\u4e24\u4e2a\u6784\u9020\u65b9\u6cd5\u90fd\u58f0\u660e\u629b\u5f03\u975e\u8fd0\u884c\u65f6\u4f8b\u5916SocketException\uff0c\u7a0b\u5e8f\u4e2d\u5fc5\u987b\u8fdb\u884c\u5904\u7406\uff0c\u6216\u8005\u6355\u83b7\u3001\u6216\u8005\u58f0\u660e\u629b\u5f03\u3002
\n \u7528\u6570\u636e\u62a5\u65b9\u5f0f\u7f16\u5199client\/server\u7a0b\u5e8f\u65f6\uff0c\u65e0\u8bba\u5728\u5ba2\u6237\u65b9\u8fd8\u662f\u670d\u52a1\u65b9\uff0c\u9996\u5148\u90fd\u8981\u5efa\u7acb\u4e00\u4e2aDatagramSocket\u5bf9\u8c61\uff0c\u7528\u6765\u63a5\u6536\u6216\u53d1\u9001\u6570\u636e\u62a5\uff0c\u7136\u540e\u4f7f\u7528DatagramPacket\u7c7b\u5bf9\u8c61\u4f5c\u4e3a\u4f20\u8f93\u6570\u636e\u7684\u8f7d\u4f53\u3002
\nDatagramPacket\u7684\u6784\u9020\u65b9\u6cd5 \uff1a
\n\u3000[java]\u3000\u3000DatagramPacket\uff08byte buf[],int length\uff09\uff1b
\n\u3000\u3000\u3000DatagramPacket(byte buf[], int length, InetAddress addr, int port);
\n\u3000\u3000\u3000DatagramPacket(byte[] buf, int offset, int length)\uff1b
\n\u3000\u3000\u3000DatagramPacket(byte[] buf, int offset, int length, InetAddress address, int port)\uff1b[\/java]
\n\u5176\u4e2d\uff0cbuf\u4e2d\u5b58\u653e\u6570\u636e\u62a5\u6570\u636e\uff0clength\u4e3a\u6570\u636e\u62a5\u4e2d\u6570\u636e\u7684\u957f\u5ea6\uff0caddr\u548cport\u65e8\u660e\u76ee\u7684\u5730\u5740\uff0coffset\u6307\u660e\u4e86\u6570\u636e\u62a5\u7684\u4f4d\u79fb\u91cf\u3002
\n\u5728\u63a5\u6536\u6570\u636e\u524d\uff0c\u5e94\u8be5\u91c7\u7528\u4e0a\u9762\u7684\u7b2c\u4e00\u79cd\u65b9\u6cd5\u751f\u6210\u4e00\u4e2aDatagramPacket\u5bf9\u8c61\uff0c\u7ed9\u51fa\u63a5\u6536\u6570\u636e\u7684\u7f13\u51b2\u533a\u53ca\u5176\u957f\u5ea6\u3002\u7136\u540e\u8c03\u7528DatagramSocket \u7684\u65b9\u6cd5receive()\u7b49\u5f85\u6570\u636e\u62a5\u7684\u5230\u6765\uff0creceive()\u5c06\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u6536\u5230\u4e00\u4e2a\u6570\u636e\u62a5\u4e3a\u6b62\u3002
\n\u3000\u3000[java]DatagramPacket packet=new DatagramPacket(buf, 256);
\n\u3000\u3000Socket.receive (packet);[\/java]
\n\u53d1\u9001\u6570\u636e\u524d\uff0c\u4e5f\u8981\u5148\u751f\u6210\u4e00\u4e2a\u65b0\u7684DatagramPacket\u5bf9\u8c61\uff0c\u8fd9\u65f6\u8981\u4f7f\u7528\u4e0a\u9762\u7684\u7b2c\u4e8c\u79cd\u6784\u9020\u65b9\u6cd5\uff0c\u5728\u7ed9\u51fa\u5b58\u653e\u53d1\u9001\u6570\u636e\u7684\u7f13\u51b2\u533a\u7684\u540c\u65f6\uff0c\u8fd8\u8981\u7ed9\u51fa\u5b8c\u6574\u7684\u76ee\u7684\u5730\u5740\uff0c\u5305\u62ecIP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u53d1\u9001\u6570\u636e\u662f\u901a\u8fc7DatagramSocket\u7684\u65b9\u6cd5 send()\u5b9e\u73b0\u7684\uff0csend()\u6839\u636e\u6570\u636e\u62a5\u7684\u76ee\u7684\u5730\u5740\u6765\u5bfb\u5f84\uff0c\u4ee5\u4f20\u9012\u6570\u636e\u62a5\u3002
\n[java]\u3000\u3000DatagramPacket packet=new DatagramPacket(buf, length, address, port);
\n\u3000\u3000Socket.send(packet)\uff1b[\/java]
\n \u5728\u6784\u9020\u6570\u636e\u62a5\u65f6\uff0c\u8981\u7ed9\u51faInetAddress\u7c7b\u53c2\u6570\u3002\u7c7bInetAddress\u5728\u5305java.net\u4e2d\u5b9a\u4e49\uff0c\u7528\u6765\u8868\u793a\u4e00\u4e2aInternet\u5730\u5740\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b83\u63d0\u4f9b\u7684\u7c7b\u65b9\u6cd5getByName\uff08\uff09\u4ece\u4e00\u4e2a\u8868\u793a\u4e3b\u673a\u540d\u7684\u5b57\u7b26\u4e32\u83b7\u53d6\u8be5\u4e3b\u673a\u7684IP\u5730\u5740\uff0c\u7136\u540e\u518d\u83b7\u53d6\u76f8\u5e94\u7684\u5730\u5740\u4fe1\u606f\u3002<\/p>\n
3\uff0c\u7528Datagram\u8fdb\u884c\u5e7f\u64ad\u901a\u8baf\uff08MulticastSocket\uff09
\nDatagramSocket\u53ea\u5141\u8bb8\u6570\u636e\u62a5\u53d1\u9001\u4e00\u4e2a\u76ee\u7684\u5730\u5740\uff0cjava.net\u5305\u4e2d\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7c7bMulticastSocket\uff0c\u5141\u8bb8\u6570\u636e\u62a5\u4ee5\u5e7f\u64ad\u65b9\u5f0f\u53d1\u9001\u5230\u8be5\u7aef\u53e3\u7684\u6240\u6709\u5ba2\u6237\u3002MulticastSocket\u7528\u5728\u5ba2\u6237\u7aef\uff0c\u76d1\u542c\u670d\u52a1\u5668\u5e7f\u64ad\u6765\u7684\u6570\u636e\u3002
\n1. \u5ba2\u6237\u65b9\u7a0b\u5e8f:MulticastClient.java
\n\u3000\u3000[java]import java.io.*;
\n\u3000\u3000import java.net.*;
\n\u3000\u3000import java.util.*;
\n\u3000\u3000public class MulticastClient {
\n\u3000\u3000\u3000\u3000public static void main(String args[]) throws IOException
\n\u3000\u3000\u3000\u3000{
\n\u3000\u3000\u3000\u3000\u3000MulticastSocket socket=new MulticastSocket(4446);
\n\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa4446\u7aef\u53e3\u7684\u5e7f\u64ad\u5957\u63a5\u5b57
\n\u3000\u3000\u3000\u3000\u3000InetAddress address=InetAddress.getByName("230.0.0.1");
\n\u3000\u3000\u3000\u3000\u3000\/\/\u5f97\u5230230.0.0.1\u7684\u5730\u5740\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000socket.joinGroup(address);
\n\u3000\u3000\u3000\u3000\u3000\/\/\u4f7f\u7528joinGroup()\u5c06\u5e7f\u64ad\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u5730\u5740\u4e0a
\n\u3000\u3000\u3000\u3000\u3000DatagramPacket packet;
\n\u3000\u3000\u3000\u3000\u3000for(int i=0;i<5;i++) {
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000byte[] buf=new byte[256];
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa\u7f13\u51b2\u533a
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000packet=new DatagramPacket(buf,buf.length);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa\u63a5\u6536\u6570\u636e\u62a5
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000socket.receive(packet); \/\/\u63a5\u6536
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000String received=new String(packet.getData());
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u7531\u63a5\u6536\u5230\u7684\u6570\u636e\u62a5\u5f97\u5230\u5b57\u8282\u6570\u7ec4\uff0c
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5e76\u7531\u6b64\u6784\u9020\u4e00\u4e2aString\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000System.out.println("Quote of theMoment:"+received);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u6253\u5370\u5f97\u5230\u7684\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000} \/\/\u5faa\u73af5\u6b21
\n\u3000\u3000\u3000\u3000\u3000socket.leaveGroup(address);
\n\u3000\u3000\u3000\u3000\u3000\/\/\u628a\u5e7f\u64ad\u5957\u63a5\u5b57\u4ece\u5730\u5740\u4e0a\u89e3\u9664\u7ed1\u5b9a
\n\u3000\u3000\u3000\u3000\u3000socket.close(); \/\/\u5173\u95ed\u5e7f\u64ad\u5957\u63a5\u5b57
\n\u3000\u3000\u3000}
\n\u3000}[\/java]
\n\u30002. \u670d\u52a1\u5668\u65b9\u7a0b\u5e8f:MulticastServer.java
\n\u3000[java]\u3000public class MulticastServer{
\n\u3000\u3000\u3000\u3000public static void main(String args[]) throws java.io.IOException
\n\u3000\u3000\u3000\u3000{
\n\u3000\u3000\u3000\u3000\u3000\u3000new MulticastServerThread().start();
\n\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u542f\u52a8\u4e00\u4e2a\u670d\u52a1\u5668\u7ebf\u7a0b
\n\u3000\u3000\u3000\u3000}
\n\u3000\u3000}[\/java]
\n\u30003. \u7a0b\u5e8fMulticastServerThread.java
\n\u3000\u3000[java]import java.io.*;
\n\u3000\u3000import java.net.*;
\n\u3000\u3000import java.util.*;
\n\u3000\u3000public class MulticastServerThread extends QuoteServerThread
\n\u3000\u3000\/\/\u4eceQuoteServerThread\u7ee7\u627f\u5f97\u5230\u65b0\u7684\u670d\u52a1\u5668\u7ebf\u7a0b\u7c7bMulticastServerThread
\n\u3000\u3000{
\n\u3000\u3000\u3000\u3000Private long FIVE_SECOND=5000; \/\/\u5b9a\u4e49\u5e38\u91cf\uff0c5\u79d2\u949f
\n\u3000\u3000\u3000\u3000public MulticastServerThread(String name) throws IOException
\n\u3000\u3000\u3000\u3000{
\n\u3000\u3000\u3000\u3000\u3000\u3000super("MulticastServerThread");
\n\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u8c03\u7528\u7236\u7c7b\uff0c\u4e5f\u5c31\u662fQuoteServerThread\u7684\u6784\u9020\u51fd\u6570
\n\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000public void run() \/\/\u91cd\u5199\u7236\u7c7b\u7684\u7ebf\u7a0b\u4e3b\u4f53
\n\u3000\u3000\u3000\u3000{
\n\u3000\u3000\u3000\u3000\u3000while(moreQuotes) {
\n\u3000\u3000\u3000\u3000\u3000\/\/\u6839\u636e\u6807\u5fd7\u53d8\u91cf\u5224\u65ad\u662f\u5426\u7ee7\u7eed\u5faa\u73af
\n\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000byte[] buf=new byte[256];
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u521b\u5efa\u7f13\u51b2\u533a
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000String dString=null;
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000if(in==null) dString=new Date().toString();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5982\u679c\u521d\u59cb\u5316\u7684\u65f6\u5019\u6253\u5f00\u6587\u4ef6\u5931\u8d25\u4e86\uff0c
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5219\u4f7f\u7528\u65e5\u671f\u4f5c\u4e3a\u8981\u4f20\u9001\u7684\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000else dString=getNextQuote();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5426\u5219\u8c03\u7528\u6210\u5458\u51fd\u6570\u4ece\u6587\u4ef6\u4e2d\u8bfb\u51fa\u5b57\u7b26\u4e32
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000buf=dString.getByte();
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u628aString\u8f6c\u6362\u6210\u5b57\u8282\u6570\u7ec4\uff0c\u4ee5\u4fbf\u4f20\u9001send it
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000InetAddress group=InetAddress.getByName("230.0.0.1");
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u5f97\u5230230.0.0.1\u7684\u5730\u5740\u4fe1\u606f
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000DatagramPacket packet=
\n new DatagramPacket(buf,buf.length,group,4446);
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u6839\u636e\u7f13\u51b2\u533a\uff0c\u5e7f\u64ad\u5730\u5740\uff0c\u548c\u7aef\u53e3\u53f7\u521b\u5efaDatagramPacket\u5bf9\u8c61
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000socket.send(packet); \/\/\u53d1\u9001\u8be5Packet
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000try{
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000sleep((long)(Math.random()*FIVE_SECONDS));
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\u968f\u673a\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c0\uff5e5\u79d2\u4e4b\u95f4
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}catch(InterruptedException e) { } \/\/\u5f02\u5e38\u5904\u7406
\n\u3000\u3000\u3000\u3000\u3000\u3000}catch(IOException e){ \/\/\u5f02\u5e38\u5904\u7406
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000e.printStackTrace( ); \/\/\u6253\u5370\u9519\u8bef\u6808
\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000moreQuotes=false; \/\/\u7f6e\u7ed3\u675f\u5faa\u73af\u6807\u5fd7
\n\u3000\u3000\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000}
\n\u3000\u3000\u3000\u3000socket.close( ); \/\/\u5173\u95ed\u5e7f\u64ad\u5957\u63a5\u53e3
\n\u3000\u3000\u3000}
\n\u3000}[\/java]<\/p>\n","protected":false},"excerpt":{"rendered":"
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