{"id":25219,"date":"2025-04-19T12:03:05","date_gmt":"2025-04-19T04:03:05","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/25219.html"},"modified":"2025-04-19T12:03:05","modified_gmt":"2025-04-19T04:03:05","slug":"%e3%80%90%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e9%80%9a%e5%85%b3%e4%b9%8b%e8%b7%af%e3%80%91-udp-%e5%9f%ba%e7%a1%80%e5%9b%9e%e6%98%be%e6%9c%8d%e5%8a%a1%e5%99%a8java%e5%ae%9e%e7%8e%b0%e5%8f%8a%e4%bd%a0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/25219.html","title":{"rendered":"\u3010\u7f51\u7edc\u7f16\u7a0b\u901a\u5173\u4e4b\u8def\u3011 Udp \u57fa\u7840\u56de\u663e\u670d\u52a1\u5668(Java\u5b9e\u73b0)\u53ca\u4f60\u4e0d\u77e5\u9053\u77e5\u8bc6\u539f\u7406\u8be6\u89e3 \uff01 \uff01 \uff01"},"content":{"rendered":"

\u672c\u7bc7\u4f1a\u52a0\u5165\u4e2a\u4eba\u7684\u6240\u8c13\u9c7c\u5f0f\u75af\u8a00<\/p>\n

\u2764\ufe0f\u2764\ufe0f\u2764\ufe0f\u9c7c\u5f0f\u75af\u8a00:\u2764\ufe0f\u2764\ufe0f\u2764\ufe0f\u6b64\u75af\u8a00\u975e\u5f7c\u75af\u8a00<\/p>\n

\u800c\u662f\u7406\u89e3\u8fc7\u5e76\u603b\u7ed3\u51fa\u6765\u901a\u4fd7\u6613\u61c2\u7684\u5927\u767d\u8bdd,<\/p>\n

\u5c0f\u7f16\u4f1a\u5c3d\u53ef\u80fd\u7684\u5728\u6bcf\u4e2a\u6982\u5ff5\u540e\u63d2\u5165\u9c7c\u5f0f\u75af\u8a00,\u5e2e\u52a9\u5927\u5bb6\u7406\u89e3\u7684.<\/p>\n

🤭🤭🤭\u53ef\u80fd\u8bf4\u7684\u4e0d\u662f\u90a3\u4e48\u4e25\u8c28.\u4f46\u5c0f\u7f16\u521d\u5fc3\u662f\u80fd\u8ba9\u66f4\u591a\u4eba\u80fd\u63a5\u53d7\u6211\u4eec\u8fd9\u4e2a\u6982\u5ff5 ！！！<\/p>\n

\"\"<\/p>\n

\u5f15\u8a00<\/h2>\n

\u5728\u8fd9\u4e2a\u4fe1\u606f\u7206\u70b8\u7684\u65f6\u4ee3，\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\u548c\u6548\u7387\u6bd4\u4ee5\u5f80\u4efb\u4f55\u65f6\u5019\u90fd\u66f4\u52a0\u91cd\u8981\u3002\u60f3\u8c61\u4e00\u4e0b，\u4f60\u6b63\u5728\u89c2\u770b\u4e00\u573a\u5728\u7ebf\u76f4\u64ad\u7684\u4f53\u80b2\u8d5b\u4e8b，\u7a81\u7136\u753b\u9762\u5361\u987f，\u6570\u636e\u5305\u4e22\u5931\u2014\u2014\u8fd9\u53ef\u80fd\u662f\u7531\u4e8eTCP\u534f\u8bae\u7684\u91cd\u4f20\u673a\u5236\u5bfc\u81f4\u7684\u5ef6\u8fdf\u3002<\/p>\n

\u4f46\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f UDP，\u60c5\u51b5\u53ef\u80fd\u4f1a\u5b8c\u5168\u4e0d\u540c\u3002UDP，\u5373\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae，\u4ee5\u5176\u8f7b\u91cf\u7ea7\u548c\u4f4e\u5ef6\u8fdf\u7684\u7279\u6027，\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u89d2\u8272\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8UDP\u7684\u5de5\u4f5c\u539f\u7406，\u4ee5\u53ca\u5b83\u5982\u4f55\u4e3a\u73b0\u4ee3\u7f51\u7edc\u901a\u4fe1\u5e26\u6765\u9769\u547d\u6027\u7684\u53d8\u5316\u3002<\/p>\n

\u76ee\u5f55<\/h2>\n
  • \n

    Udp\u4e0eTcp \u534f\u8bae<\/p>\n<\/li>\n

  • \n

    Udp\u670d\u52a1\u5668\u7684\u5b9e\u73b0\u8fc7\u7a0b\u53ca\u539f\u7406<\/p>\n<\/li>\n

  • \n

    Udp\u5ba2\u6237\u7aef\u7684\u5b9e\u73b0\u8fc7\u7a0b\u53ca\u539f\u7406<\/p>\n<\/li>\n

  • \n

    \u56de\u663e\u670d\u52a1\u5668\u7684\u539f\u7406\u5256\u6790\u53ca\u6269\u5c55\u5b57\u5178\u670d\u52a1\u5668\u529f\u80fd<\/p>\n<\/li>\n

    \u4e00. Udp \u4e0e Tcp \u534f\u8bae<\/h2>\n

    1. Udp \u4e0e Tcp \u7684\u521d\u8bc6<\/h3>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    Udp \u548c Tcp \u90fd\u662f Tcp \/ IP \u4e94\u5c42\u534f\u8bae\u4e2d\u7684 \u7b2c\u56db\u5c42： \u4f20\u8f93\u5c42 , \u4e3b\u8981\u63d0\u4f9b\u5728\u4e0d\u540c\u4e3b\u673a\u4e0a\u63d0\u4f9b\u8fdb\u7a0b\u548c\u8fdb\u7a0b\u7684 \u4f20\u8f93\u670d\u52a1 ， \u4e3b\u8981\u8fd8\u662f\u5173\u6ce8\u4f20\u8f93\u7684 \u8d77\u70b9\u548c\u7ec8\u70b9 \u3002<\/p>\n

    2. Udp \u7684\u7279\u70b9 \u548c Tcp\u7684\u7279\u70b9<\/h3>\n

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

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

      \n
    • \n

      \u8fde\u63a5\u6027：\u8fde\u63a5\u7684\u542b\u4e49： \u4e0d\u662f\u5b9e\u9645\u610f\u4e49\u4e0a\u7684\u4e24\u6839\u7ebf\u8fde\u8d77\u6765，\u800c\u662f\u4e00\u79cd \u62bd\u8c61\u7684\u8fde\u63a5 ， \u5c31\u662f\u8bf4\u901a\u4fe1\u53cc\u65b9\u90fd\u4fdd\u5b58\u7740\u5bf9\u65b9\u7684 \u4fe1\u606f（IP\u5730\u5740， \u7aef\u53e3\u53f7）<\/p>\n

      \u5bf9\u4e8eUdp \u6765\u8bf4\u662f\u65e0\u8fde\u63a5\u7684，\u4e5f\u5c31\u662f \u6ca1\u6709 \u4fdd\u5b58 \u5bf9\u65b9\u4fe1\u606f\u7684\u4e00\u79cd\u8fde\u63a5\u7279\u6027\u3002<\/p>\n

      \u5bf9\u4e8eTcp \u6765\u8bf4\u662f\u6709\u8fde\u63a5\u7684， \u4e5f\u5c31\u662f \u4fdd\u5b58\u7740 \u5bf9\u65b9\u4fe1\u606f \u7684\u4e00\u79cd\u8fde\u63a5\u7279\u6027\u3002<\/p>\n<\/li>\n

    • \n

      \u53ef\u9760\u6027 ： \u5bf9\u4e8e\u7f51\u7edc\u901a\u8baf\u6765\u8bf4\u53ef\u9760 \u4e0d\u662f\u767e\u5206\u767e\u901a\u4fe1， \u800c\u4e0d\u4e22\u5931\u6570\u636e \u3002 \u53ef\u9760\u6027\u7684\u5173\u952e\u5c31\u5728\u4e8e\u5f53 \u6570\u636e\u53d1\u9001\u9519\u8bef\u6216\u51fa\u73b0\u6570\u636e\u4e22\u5931 \u7684\u60c5\u51b5， \u662f\u5426\u4f1a\u8fdb\u884c \u91cd\u4f20 \u6570\u636e\u3002<\/p>\n

      \u5bf9\u4e8e Tcp \u6765\u8bf4， \u662f\u6709 \u5e94\u7b54\u54cd\u5e94\u548c\u5ef6\u65f6\u91cd\u4f20\u673a\u5236\u7684（\u91cd\u70b9\u5185\u5bb9\u540e\u9762\u6587\u7ae0\u8be6\u89e3）， \u5f53\u7f51\u7edc\u6570\u636e\u53d1\u751f\u5f71\u54cd\u65f6， \u5c31\u4f1a\u8fdb\u884c \u91cd\u4f20\u3002 \u9632\u6b62\u6570\u636e\u7684\u4e22\u5931 \u3002<\/p>\n

      \u5bf9\u4e8e Udp \u6765\u8bf4， \u662f\u6ca1\u6709\u7684， \u5f53\u7f51\u7edc\u901a\u4fe1\u51fa\u73b0\u95ee\u9898\u65f6， \u5c31\u4f1a\u8fdb\u884c\u76f4\u63a5\u628a\u8fd9\u6bb5\u6570\u636e\u76f4\u63a5\u4e22\u5f03， \u4e0d\u4f1a\u53d1\u751f\u91cd\u4f20 \u3002<\/p>\n<\/li>\n

    • \n

      \u9762\u5411\u6570\u636e\u62a5\u4e0e\u9762\u5411\u5b57\u8282\u6d41： \u8fd9\u662f\u4e24\u6b21\u4e0d\u540c\u534f\u8bae\u7684 \u4f20\u8f93\u5355\u4f4d \u7684\u4e0d\u540c<\/p>\n

      \u5bf9\u4e8eTcp \u6765\u8bf4 ， \u9762\u5411\u5b57\u8282\u6d41\u5c31\u7b49\u540c\u4e8e\u4e00\u4e2a\u5b57\u8282\u4e00\u4e2a\u5b57\u8282\u4f20\u8f93<\/p>\n

      \u597d\u6bd4\u73b0\u6709\u4e00\u5806\u6570\u636e， \u603b\u6709\u4e8c\u767e\u4e2a\u5b57\u8282\u5355\u4f4d\u7684\u6570\u636e<\/p>\n

      \u5982\u679c\u4f60\u4e00\u4e2a\u4e00\u4e2a\u5b57\u8282\u7684\u4f20\u8f93， \u9700\u8981\u4f20\u8f93\u4e24\u767e\u6b21；<\/p>\n

      \u5982\u679c\u4f60\u5341\u4e2a\u5341\u4e2a\u5b57\u8282\u7684\u4f20\u8f93， \u9700\u8981\u4f20\u8f93\u4e8c\u5341\u6b21；<\/p>\n

      \u5982\u679c\u4f60\u4e8c\u5341\u4e2a\u5b57\u8282\u7684\u4f20\u8f93， \u9700\u8981\u4f20\u8f93\u5341\u6b21；<\/p>\n

      \u5982\u679c\u4f60\u4e00\u767e\u4e2a\u5b57\u8282\u7684\u4f20\u8f93， \u5c31\u9700\u8981\u4f20\u8f93\u4e24\u6b21；<\/p>\n

      \u5982\u679c\u4f60\u4e8c\u767e\u4e2a\u5b57\u8282\u7684\u4f20\u8f93， \u5c31\u9700\u8981\u4f20\u8f93\u4e00\u6b21\u3002<\/p>\n

      \u5bf9\u4e8eUdp \u6765\u8bf4， \u662f\u9762\u5411\u6570\u636e\u62a5\u7684， \u8fd9\u91cc\u7684\u6570\u636e\u62a5\u8fd8\u6bd4\u6316\u83dc\u9700\u8981\u7528\u9504\u5934， \u780d\u67f4\u9700\u8981\u7528\u65a7\u5934\u4e00\u6837， \u662f\u4e00\u79cd \u4e13\u95e8 \u4e3a\u7f51\u7edc\u901a\u4fe1\u4f20\u8f93\u6784\u9020\u7684\u4e00\u79cd \u7279\u6b8a\u7ed3\u6784\u7684\u4f20\u8f93\u5355\u4f4d \u3002<\/p>\n

      \u6211\u4eec\u53ea\u9700\u8981\u6784\u9020\u597d \u6570\u636e\u62a5， \u628a\u9700\u8981\u4f20\u8f93\u7684\u6570\u636e\u5f53 \u6210\u4e00\u4e2a\u6574\u4f53 \u6253\u5305\u6210 \u6570\u636e\u62a5 \u5373\u53ef\u3002<\/p>\n<\/li>\n

    • \n

      \u5168\u53cc\u5de5\u4e0e\u534a\u53cc\u5de5 ： \u53cc\u5de5\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u79cd \u4f20\u8f93\u7684\u65b9\u5411 ， \u65e0\u8bba\u662fTcp \u548c Udp ， \u90fd\u662f\u5168\u53cc\u5de5， \u5176\u542b\u4e49\u5c31\u662f，\u65e0\u8bba\u5bf9\u4e8e\u8fd9\u4e24\u79cd\u534f\u8bae\u90e8\u7f72\u5230\u4e3b\u673a\u4e0a， \u65e2\u53ef\u4ee5 \u53d1\u9001\u6570\u636e， \u4e5f\u53ef\u4ee5 \u63a5\u53d7\u6570\u636e， \u65e2\u53ef\u4ee5 \u53d1\u9001\u8bf7\u6c42， \u4e5f\u53ef\u4ee5 \u5bf9\u8bf7\u6c42\u505a\u51fa\u54cd\u5e94 \u3002 \u53ef\u4ee5\u8ba4\u4e3a\u662f\u4e00\u79cd\u53cc\u65b9\u5411\u7684 \u3002<\/p>\n

      \u800c\u534a\u53cc\u5de5\u5c31\u662f\u90e8\u7f72\u597d\u534f\u8bae\u4e4b\u540e， \u8fd9\u4e2a\u901a\u4fe1\u8bbe\u5907\u8981\u4e48 \u53ea\u80fd\u63a5\u53d7\u6570\u636e ， \u8981\u4e48\u53ea\u80fd\u53d1\u9001\u6570\u636e， \u800c \u4e0d\u80fd\u540c\u65f6\u63a5\u53d7\u6570\u636e\u548c\u53d1\u9001\u6570\u636e, \u662f\u4ee5\u4e00\u79cd \u5355\u5411 \u7684\u5f62\u5f0f\u4f20\u8f93\u3002<\/p>\n<\/li>\n<\/ul>\n

      \u4e8c. Udp\u670d\u52a1\u5668\u7684\u5b9e\u73b0\u8fc7\u7a0b\u53ca\u539f\u7406<\/h2>\n

      1. \u5f15\u5165<\/h3>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u4ecb\u7ecd\u5b8cTcp\u548cUdp\u7684\u7279\u70b9\u4e4b\u540e，\u4e0b\u9762\u5c31\u5f00\u59cb\u4e0a\u573a\u672c\u7bc7\u6587\u7ae0\u7684\u6838\u5fc3\u5185\u5bb9，\u5e26\u7740\u5c0f\u4f19\u4f34\u4eec\u4e00\u8d77\u5b9e\u8df5\u5229\u7528 Udp \u534f\u8bae\u5199\u4e00\u4e2a \u56de\u663e\u670d\u52a1\u5668\u7a0b\u5e8f \u3002<\/p>\n

      \u4ec0\u4e48\u662f \u56de\u663e ？？？<\/p>\n

      \u5c31\u662f\u8fd9\u4e2a\u670d\u52a1\u5668\u54cd\u5e94\u7ed9\u5ba2\u6237\u7aef\u7684\u662f \u5ba2\u6237\u7aef\u81ea\u8eab\u53d1\u6765\u7684\u8bf7\u6c42 ， \u670d\u52a1\u5668\u8fd9\u8fb9\u4e0d\u505a\u4e1a\u52a1\/ \u903b\u8f91\u4e0a \u7684\u5904\u7406， \u800c\u662f\u76f4\u63a5\u628a \u539f\u8bf7\u6c42\u6570\u636e \u54cd\u5e94\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n

      \u5bf9\u4e8eUdp \u6765\u8bf4， \u5982\u679c\u9700\u8981\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u5c31\u9700\u8981\u8c03\u7528 \u7cfb\u7edf\u539f\u751fapi \u6765\u8fdb\u884c\u5b9e\u73b0 ， \u5c31\u9700\u8981\u4e86\u89e3 \u7cfb\u7edf\u539f\u751fapi \u7684\u4f7f\u7528\u7ec6\u8282， \u4f46\u5bf9\u4e8eJava\u7a0b\u5e8f\u733f\u6765\u8bf4， JDK\u65e9\u5df2\u628a api \u8fdb\u884c\u5c01\u88c5， \u5c01\u88c5\u6210 \u4e24\u4e2a\u7c7b： DatagramSocket , DatagramPacket \u3002 \u8fd9\u4e24\u4e2a\u7c7b\u90fd\u6765\u81ea\u4e8e Java.net \u8fd9\u4e2a\u5305\u4e2d\u3002<\/p>\n

      DatagramSocket \u76f8\u5173\u65b9\u6cd5： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u4e0a\u8ff0 \u5bf9 DAtagramSocket \u5b9e\u4f8b\u5316\u4e00\u4e2a Socket \u5bf9\u8c61\u65f6， \u6211\u4eec\u5c31\u662f\u5229\u7528\u8fd9\u4e2a Socket \u5bf9\u8c61 \u6765\u5bf9 \u7f51\u5361\u8fdb\u884c\u64cd\u4f5c ， \u4ece\u800c\u8fdb\u884c \u7f51\u7edc\u901a\u4fe1\u7684\u5fc5\u8981\u64cd\u4f5c \u3002<\/p>\n

      DatagramPacket \u76f8\u5173\u65b9\u6cd5：<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u800c DatagramPacket \u5219\u662f\u4e0a\u9762\u8c08\u53ca\u7684\u6570\u636e\u62a5， \u6bcf\u5b9e\u4f8b\u5316\u4e00\u4e2a\u6570\u636e\u62a5\u65f6， \u5c31\u8981\u4f20\u5165\u5bf9\u4e8e\u7684 byte[] \u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570， \u6253\u5305\u6210 \u4e00\u4e2a\u6574\u4f53\u7684\u6570\u636e\u62a5\u5355\u5143 \u8fdb\u884c\u4f20\u8f93\u3002<\/p>\n

      \u60f3\u5fc5\u5c0f\u4f19\u4f34\u4eec\u5e94\u8be5\u8fd8\u6ca1\u6709\u7406\u89e3\u5427， \u4e0b\u9762\u7684\u539f\u7406\u90e8\u7f72\u548c\u4ee3\u7801\u6f14\u793a\u8bb2\u5e26\u7740\u5927\u4f19\u719f\u6089\u8fd9\u4e9b\u65b9\u6cd5\u7684\u4f7f\u7528 💖 💖 💖 💖 💖<\/p>\n

      2. \u670d\u52a1\u5668\u7aef\u4ee3\u7801\u6f14\u793a<\/h3>\n

      package<\/span> network<\/span>;<\/span><\/p>\n

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

      public<\/span> class<\/span> MyServer<\/span> {<\/span><\/p>\n

      \/\/ \u5b9a\u4e49\u4e00\u4e2a \u6570\u636e\u5305\u63d2\u53e3<\/span>
      \n private<\/span> DatagramSocket<\/span> socker =<\/span> null<\/span>;<\/span><\/p>\n

      \/\/ \u6784\u9020\u65b9\u6cd5<\/span>
      \n public<\/span> MyServer<\/span>(<\/span>int<\/span> port)<\/span> throws<\/span> SocketException<\/span> {<\/span>
      \n \/\/ \u8fdb\u884c\u8fdb\u7a0b\u548c \u7aef\u53e3\u53f7\u7684\u8fde\u63a5<\/span>
      \n socker =<\/span> new<\/span> DatagramSocket<\/span>(<\/span>port)<\/span>;<\/span><\/p>\n

      }<\/span><\/p>\n

      public<\/span> void<\/span> start<\/span>(<\/span>)<\/span> throws<\/span> IOException<\/span> {<\/span><\/p>\n

      while<\/span>(<\/span>true<\/span>)<\/span> {<\/span>
      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u670d\u52a1\u5668\u5f00\u59cb\u8fd0\u884c…"<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u6253\u5305\u6570\u636e\u5305\u57fa\u672c\u5355\u4f4d<\/span>
      \n DatagramPacket<\/span> requestPacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>new<\/span> byte<\/span>[<\/span>4096<\/span>]<\/span>,<\/span>4096<\/span> )<\/span>;<\/span><\/p>\n

      \/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e<\/span>
      \n socker.<\/span>receive<\/span>(<\/span>requestPacket)<\/span>;<\/span><\/p>\n

      \/\/ \u8f6c\u4e3a\u6210\u5b57\u7b26\u4e32\u6253\u5370\u65e5\u5fd7<\/span>
      \n String<\/span> request =<\/span> new<\/span> String<\/span>(<\/span>requestPacket.<\/span>getData<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> requestPacket.<\/span>getLength<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u6267\u884c\u4e1a\u52a1\u903b\u8f91\u5e76\u5bf9\u5ba2\u6237\u7aef\u8fdb\u884c\u54cd\u5e94<\/span>
      \n String<\/span> response =<\/span> process<\/span>(<\/span>request)<\/span>;<\/span><\/p>\n

      \/\/ \u6253\u5305\u4e00\u7ec4\u54cd\u5e94\u7684\u6570\u636e\u5305<\/span>
      \n\/\/ \u6ce8\u610f\u8fd9\u91cc\u8981\u5e26\u4e0a\u5bf9\u5e94\u5ba2\u6237\u7aef\u8f93\u5165\u7684ip\u5730\u5740\u548c\u7aef\u53e3\u53f7<\/span>
      \n DatagramPacket<\/span> responsePacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>response.<\/span>getBytes<\/span>(<\/span>)<\/span>,<\/span>0<\/span>,<\/span> response.<\/span>getBytes<\/span>(<\/span>)<\/span>.<\/span>length,<\/span>
      \n requestPacket.<\/span>getSocketAddress<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u8fdb\u884c\u54cd\u5e94\u56de\u670d\u52a1\u5668\u4e2d<\/span>
      \n socker.<\/span>send<\/span>(<\/span>responsePacket)<\/span>;<\/span><\/p>\n

      \/\/ \u6253\u5370\u65e5\u5fd7<\/span>
      \n System<\/span>.<\/span>out.<\/span>printf<\/span>(<\/span>"[ip\u5730\u5740\u4e3a：%s, %s,\u7aef\u53e3\u53f7\u4e3a：%d, %d \u5ba2\u6237\u7aef\u7684\u7684\u9700\u6c42\u7684\u4e3a: %s, \u670d\u52a1\u5668\u7684\u54cd\u5e94\u4e3a: %s]\\\\n"<\/span>,<\/span>
      \n requestPacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span>responsePacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span> responsePacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span>requestPacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span> request,<\/span> response)<\/span>;<\/span>
      \n }<\/span>
      \n }<\/span><\/p>\n

      \/\/ \u4e1a\u52a1\u903b\u8f91\u7684\u65b9\u6cd5<\/span>
      \n public<\/span> String<\/span> process<\/span>(<\/span>String<\/span> request)<\/span> {<\/span>
      \n return<\/span> request;<\/span>
      \n }<\/span><\/p>\n

      public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> IOException<\/span>{<\/span>
      \n MyServer<\/span> myServer =<\/span> new<\/span> MyServer<\/span>(<\/span>9090<\/span>)<\/span>;<\/span>
      \n myServer.<\/span>start<\/span>(<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      3. \u670d\u52a1\u5668\u7aef\u4ee3\u7801\u6d41\u7a0b\u8bb2\u89e3<\/h3>\n

      \u5bf9\u4e8e\u670d\u52a1\u5668\u8fd9\u7aef\u6765\u8bf4：<\/p>\n

      \u6574\u4f53 \u5206\u4e3a\u4e94\u90e8：<\/p>\n

    • \u5b9e\u4f8b\u5316 DatagramSocket \u5e76\u4ee5\u7aef\u53e3\u53f7\u4f5c\u4e3a \u6784\u9020\u65b9\u6cd5\u7684\u53c2\u6570 \u5efa\u7acb \u7aef\u53e3\u53f7\u4e0e\u8fdb\u7a0b \u7684\u8fde\u63a5\u3002<\/li>\n

      \/\/ \u5b9a\u4e49\u4e00\u4e2a \u6570\u636e\u5305\u63d2\u53e3<\/span>
      \n private<\/span> DatagramSocket<\/span> socker =<\/span> null<\/span>;<\/span><\/p>\n

      \/\/ \u6784\u9020\u65b9\u6cd5<\/span>
      \n public<\/span> MyServer<\/span>(<\/span>int<\/span> port)<\/span> throws<\/span> SocketException<\/span> {<\/span>
      \n \/\/ \u8fdb\u884c\u8fdb\u7a0b\u548c \u7aef\u53e3\u53f7\u7684\u8fde\u63a5<\/span>
      \n socker =<\/span> new<\/span> DatagramSocket<\/span>(<\/span>port)<\/span>;<\/span><\/p>\n

      }<\/span><\/p>\n

    • \u6253\u5305\u4e00\u4e2a\u6570\u636e\u5305\u7528\u6765 \u63a5\u6536\u5ba2\u6237\u7aef \u53d1\u6765\u7684 \u8bf7\u6c42\u3002<\/li>\n

      \/\/ \u6253\u5305\u6570\u636e\u5305\u57fa\u672c\u5355\u4f4d<\/span>
      \n DatagramPacket<\/span> requestPacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>new<\/span> byte<\/span>[<\/span>4096<\/span>]<\/span>,<\/span>4096<\/span> )<\/span>;<\/span><\/p>\n

      \/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e<\/span>
      \n socker.<\/span>receive<\/span>(<\/span>requestPacket)<\/span>;<\/span><\/p>\n

    • \u5904\u7406\u4e00\u5b9a\u7684\u4e1a\u52a1\u903b\u8f91， \u7531\u4e8e\u6211\u4eec\u8fd9\u91cc\u662f \u56de\u663e\u670d\u52a1\u5668 ，\u53ea\u8fd4\u56de\u8bf7\u6c42\u7ed3\u679c\u6210\u4e3a \u670d\u52a1\u5668\u54cd\u5e94\u7684\u5185\u5bb9 \u5373\u53ef\u3002<\/li>\n

      \/\/ \u6267\u884c\u4e1a\u52a1\u903b\u8f91\u5e76\u5bf9\u5ba2\u6237\u7aef\u8fdb\u884c\u54cd\u5e94<\/span>
      \n String<\/span> response =<\/span> process<\/span>(<\/span>request)<\/span>;<\/span><\/p>\n

      \/\/ \u4e1a\u52a1\u903b\u8f91\u7684\u65b9\u6cd5<\/span>
      \npublic<\/span> String<\/span> process<\/span>(<\/span>String<\/span> request)<\/span> {<\/span>
      \n return<\/span> request;<\/span>
      \n}<\/span><\/p>\n

    • \u6784\u9020\u4e00\u4e2a \u6570\u636e\u5305 (\u5e26\u4e0a\u6548\u5e94\u7684\u5185\u5bb9，\u957f\u5ea6， \u4ee5\u53ca\u5730\u5740) \u7528\u4e8e\u628a \u670d\u52a1\u5668\u6548\u5e94 \u53d1\u9001\u56de \u670d\u52a1\u5668\u3002<\/li>\n

      \/\/ \u6253\u5305\u4e00\u7ec4\u54cd\u5e94\u7684\u6570\u636e\u5305<\/span>
      \n\/\/ \u6ce8\u610f\u8fd9\u91cc\u8981\u5e26\u4e0a\u5bf9\u5e94\u5ba2\u6237\u7aef\u8f93\u5165\u7684ip\u5730\u5740\u548c\u7aef\u53e3\u53f7<\/span>
      \n DatagramPacket<\/span> responsePacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>response.<\/span>getBytes<\/span>(<\/span>)<\/span>,<\/span>0<\/span>,<\/span> response.<\/span>getBytes<\/span>(<\/span>)<\/span>.<\/span>length,<\/span>
      \n requestPacket.<\/span>getSocketAddress<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u8fdb\u884c\u54cd\u5e94\u56de\u670d\u52a1\u5668\u4e2d<\/span>
      \n socker.<\/span>send<\/span>(<\/span>responsePacket)<\/span>;<\/span><\/p>\n

    • \u5c06 \u5ba2\u6237\u7aef\u7684 IP\u5730\u5740， \u5ba2\u6237\u7aef\u7684 \u7aef\u53e3\u53f7 ， \u8bf7\u6c42， \u6548\u5e94 \u90fd \u6253\u5370 \u51fa\u6765\u3002<\/li>\n

      \/\/ \u6253\u5370\u65e5\u5fd7<\/span>
      \n System<\/span>.<\/span>out.<\/span>printf<\/span>(<\/span>"[<\/span>ip\u5730\u5740\u4e3a：%<\/span>s,<\/span> %<\/span>s,<\/span>\u7aef\u53e3\u53f7\u4e3a：%<\/span>d,<\/span> %<\/span>d
      \n \u5ba2\u6237\u7aef\u7684\u7684\u9700\u6c42\u7684\u4e3a:<\/span> %<\/span>s,<\/span> \u670d\u52a1\u5668\u7684\u54cd\u5e94\u4e3a:<\/span> %<\/span>s]<\/span>\\\\n",<\/span>
      \n requestPacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span>responsePacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span>
      \nresponsePacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span>requestPacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span> request,<\/span> response)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \u9c7c\u5f0f\u75af\u8a00<\/h3>\n
    • \u7531\u4e8e \u7f51\u7edc\u901a\u4fe1 \u9700\u8981\u7684\u662f \u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef \u540c\u65f6\u4ea4\u4e92 \u624d\u80fd\u5c55\u793a\u6548\u679c，\u6240\u4ee5\u5c0f\u4f19\u4f34\u4eec\u4e00\u5b9a\u8981\u8bb0\u4f4f\u53ea\u6709\u4e24\u53f0\u673a\u5b50\u4ee5\u4e0a\u624d\u80fd\u5b8c\u6210 \u56de\u663e\u670d\u52a1\u5668 \u7684\u5b9e\u73b0\u3002<\/li>\n
    • \n

      \u5728 \u7aef\u53e3\u53f7\u4e0e\u8fdb\u7a0b \u8fdb\u884c\u8fde\u63a5\u65f6， \u9700\u8981\u6ce8\u610f\u7684\u662f：<\/p>\n

      \u4e00\u4e2a \u8fdb\u7a0b\u80fd\u8fde\u63a5 \u591a\u4e2a \u7aef\u53e3\u53f7<\/p>\n

      \u4f46\u662f \u4e00\u4e2a \u7aef\u53e3\u53f7\u53ea\u80fd\u8fde\u63a5 \u4e00\u4e2a \u8fdb\u7a0b\u3002<\/p>\n<\/li>\n

    • \u5728\u83b7\u53d6 IP\u5730\u5740 \u548c \u7aef\u53e3\u53f7 \u6253\u5370\u65f6， \u5c31\u9700\u8981\u901a\u8fc7Socket \u7684\u5bf9\u8c61：responsePacket \/ requestPacket ， \u8fd9\u4e24\u4e2a\u6570\u636e\u62a5\u4e2d\u4e0d\u4ec5\u5305\u542b \u6570\u636e\u5185\u5bb9 ， \u8fd8\u542b\u6709 \u5ba2\u6237\u7aef \u7684 \u5730\u5740\u548c\u7aef\u53e3\u53f7 \u7b49\u2026 \u5404\u79cd\u9700\u8981\u4f20\u9012\u7684\u4fe1\u606f\u3002<\/li>\n
    • \u6700\u540e\u8fd8\u9700\u8981\u6ce8\u610f\u4e00\u70b9： Udp\u662f \u65e0\u8fde\u63a5 \u7684\u7279\u70b9， \u6240\u4ee5\u5f53\u6211\u4eec\u9700\u8981\u53d1\u9001\u4e00\u4e2a \u8bf7\u6c42\/ \u54cd\u5e94 \u65f6， \u5c31\u9700\u8981\u5728 \u5bf9\u5e94\u7684\u6570\u636e\u62a5 \u4e2d\u52a0\u5165 IP\u5730\u5740\u548c\u7aef\u53e3\u53f7，\u7528\u6765\u6307\u660e\u9700\u8981\u53d1\u9001\u5230\u54ea\u91cc？<\/li>\n

      \u4e09. Udp\u5ba2\u6237\u7aef\u7684\u5b9e\u73b0\u8fc7\u7a0b\u53ca\u539f\u7406<\/h2>\n

      Udp \u7684\u5b9e\u73b0 \u8fd8\u662f\u5229\u7528 DatagramSocket ， DatagramPacket \u4e24\u4e2a\u7c7b\u6765\u5b9e\u73b0， \u5927\u4f53\u4e0a\u7684\u5b9e\u73b0\u8fc7\u7a0b\u662f \u76f8\u4f3c\u7684 ，\u4f46\u6709 \u7ec6\u5fae\u4e4b\u5904\u4e0d\u76f8\u540c \u3002<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u4e0b\u9762\u6211\u4eec\u6765\u770b\u770b\u5427 💖 💖 💖 💖<\/p>\n

      1. \u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u5c55\u793a<\/h3>\n

      package<\/span> network<\/span>;<\/span><\/p>\n

      import<\/span> java.<\/span>io.<\/span><\/span>IOException<\/span><\/span>;<\/span>
      \nimport<\/span> java.<\/span>net.<\/span><\/span>DatagramPacket<\/span><\/span>;<\/span>
      \nimport<\/span> java.<\/span>net.<\/span><\/span>DatagramSocket<\/span><\/span>;<\/span>
      \nimport<\/span> java.<\/span>net.<\/span><\/span>InetAddress<\/span><\/span>;<\/span>
      \nimport<\/span> java.<\/span>net.<\/span><\/span>SocketException<\/span><\/span>;<\/span>
      \nimport<\/span> java.<\/span>util.<\/span><\/span>Scanner<\/span><\/span>;<\/span><\/p>\n

      public<\/span> class<\/span> MyClient<\/span> {<\/span><\/p>\n

      \/\/ \u670d\u52a1\u5668ip<\/span>
      \n private<\/span> String<\/span> serverIp ;<\/span><\/p>\n

      \/\/ \u670d\u52a1\u5668\u7684\u7aef\u53e3\u53f7<\/span>
      \n private<\/span> int<\/span> serverPort;<\/span><\/p>\n

      \/\/ \u521b\u5efa\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u63d2\u53e3<\/span>
      \n private<\/span> DatagramSocket<\/span> clientSocket =<\/span> null<\/span>;<\/span><\/p>\n

      public<\/span> MyClient<\/span>(<\/span>String<\/span> serverIp ,<\/span> int<\/span> serverPort)<\/span> throws<\/span> SocketException<\/span> {<\/span><\/p>\n

      \/\/ \u5bf9\u8be5\u670d\u52a1\u5668\u7684ip \u548c\u7aef\u53e3\u53f7\u8fdb\u884c\u8d4b\u503c<\/span>
      \n this<\/span>.<\/span>serverIp =<\/span> serverIp;<\/span>
      \n this<\/span>.<\/span>serverPort =<\/span> serverPort;<\/span><\/p>\n

      \/\/ \u8fde\u63a5\u65f6，\u65e0\u987b\u6307\u5b9a\u53c2\u6570<\/span>
      \n clientSocket =<\/span> new<\/span> DatagramSocket<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      }<\/span><\/p>\n

      public<\/span> void<\/span> start<\/span>(<\/span>)<\/span> throws<\/span> IOException<\/span>{<\/span>
      \n while<\/span>(<\/span>true<\/span>)<\/span> {<\/span>
      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5ba2\u6237\u7aef\u5f00\u59cb\u8fd0\u884c…"<\/span>)<\/span>;<\/span>
      \n Scanner<\/span> in=<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in)<\/span>;<\/span><\/p>\n

      System<\/span>.<\/span>out.<\/span>print<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4f60\u7684\u9700\u6c42: "<\/span>)<\/span>;<\/span>
      \n\/\/ \u8f93\u5165<\/span>
      \n String<\/span> request =<\/span> in.<\/span>next<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u6253\u5305\u6210 \u6570\u636e\u91cf\u57fa\u672c\u5355\u4f4d<\/span>
      \n \/\/ \u5e76\u6307\u5b9a ip \u548c \u7aef\u53e3\u53f7<\/span>
      \n DatagramPacket<\/span> requestPacket =<\/span> new<\/span>
      \n DatagramPacket<\/span>(<\/span>request.<\/span>getBytes<\/span>(<\/span>)<\/span>,<\/span>
      \n request.<\/span>getBytes<\/span>(<\/span>)<\/span>.<\/span>length,<\/span>
      \nInetAddress<\/span>.<\/span>getByName<\/span>(<\/span>this<\/span>.<\/span>serverIp)<\/span>,<\/span> this<\/span>.<\/span>serverPort)<\/span>;<\/span><\/p>\n

      \/\/ \u53d1\u9001\u7ed9\u670d\u52a1\u5668<\/span>
      \n clientSocket.<\/span>send<\/span>(<\/span>requestPacket)<\/span>;<\/span><\/p>\n

      \/\/ \u6784\u9020\u4e00\u4e2a\u6570\u636e\u5305\u57fa\u672c\u5355\u4f4d\u63a5\u53d7\u670d\u52a1\u5668\u7684\u54cd\u5e94<\/span>
      \n DatagramPacket<\/span> receivePacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>
      \nnew<\/span> byte<\/span>[<\/span>4096<\/span>]<\/span>,<\/span>4096<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u5f00\u59cb\u63a5\u6536<\/span>
      \n clientSocket.<\/span>receive<\/span>(<\/span>receivePacket)<\/span>;<\/span><\/p>\n

      System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6700\u7ec8\u670d\u52a1\u5668\u7684\u6548\u5e94\u4e3a: "<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u8f93\u51fa\u65e5\u5fd7<\/span>
      \n String<\/span> receive =<\/span>new<\/span> String<\/span>(<\/span>receivePacket.<\/span>getData<\/span>(<\/span>)<\/span>,<\/span>
      \n0<\/span>,<\/span> receivePacket.<\/span>getLength<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

      System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>receive)<\/span>;<\/span>
      \n }<\/span><\/p>\n

      }<\/span><\/p>\n

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

      }<\/span><\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      2. \u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u6d41\u7a0b\u8bb2\u89e3<\/h3>\n
    • \u5148\u5b9e\u4f8b\u5316\u4e00\u4e2a Socket \u5bf9\u8c61 , \u5e76\u5f97\u5230 \u9700\u8981\u53d1\u9001 \u670d\u52a1\u5668 \u7684 IP\u5730\u5740\u548c\u7aef\u53e3\u53f7 \u3002<\/li>\n

      public<\/span> MyClient<\/span>(<\/span>String<\/span> serverIp ,<\/span> int<\/span> serverPort)<\/span> throws<\/span> SocketException<\/span> {<\/span><\/p>\n

      \/\/ \u5bf9\u8be5\u670d\u52a1\u5668\u7684ip \u548c\u7aef\u53e3\u53f7\u8fdb\u884c\u8d4b\u503c<\/span>
      \n this<\/span>.<\/span>serverIp =<\/span> serverIp;<\/span>
      \n this<\/span>.<\/span>serverPort =<\/span> serverPort;<\/span><\/p>\n

      \/\/ \u8fde\u63a5\u65f6，\u65e0\u987b\u6307\u5b9a\u53c2\u6570<\/span>
      \n clientSocket =<\/span> new<\/span> DatagramSocket<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      }<\/span><\/p>\n

    • \u5728\u63a7\u5236\u53f0\u4e2d \u8f93\u5165\u9700\u6c42 ，\u5e76\u6253\u5305\u6210 \u6570\u636e\u62a5 （\u5e26\u4e0a\u6570\u636e\u5185\u5bb9， IP\u5730\u5740， \u4ee5\u53ca\u7aef\u53e3\u53f7） ， \u7136\u540e\u5229\u7528 Socket \u5bf9\u8c61\u8fdb\u884c\u53d1\u9001\u3002<\/li>\n

      System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5ba2\u6237\u7aef\u5f00\u59cb\u8fd0\u884c…"<\/span>)<\/span>;<\/span>
      \n Scanner<\/span> in=<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in)<\/span>;<\/span><\/p>\n

      System<\/span>.<\/span>out.<\/span>print<\/span>(<\/span>"\u8bf7\u8f93\u5165\u4f60\u7684\u9700\u6c42: "<\/span>)<\/span>;<\/span>
      \n\/\/ \u8f93\u5165<\/span>
      \n String<\/span> request =<\/span> in.<\/span>next<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u6253\u5305\u6210 \u6570\u636e\u91cf\u57fa\u672c\u5355\u4f4d<\/span>
      \n \/\/ \u5e76\u6307\u5b9a ip \u548c \u7aef\u53e3\u53f7<\/span>
      \n DatagramPacket<\/span> requestPacket =<\/span> new<\/span>
      \n DatagramPacket<\/span>(<\/span>request.<\/span>getBytes<\/span>(<\/span>)<\/span>,<\/span> request.<\/span>getBytes<\/span>(<\/span>)<\/span>.<\/span>length,<\/span>
      \n InetAddress<\/span>.<\/span>getByName<\/span>(<\/span>this<\/span>.<\/span>serverIp)<\/span>,<\/span> this<\/span>.<\/span>serverPort)<\/span>;<\/span><\/p>\n

      \/\/ \u53d1\u9001\u7ed9\u670d\u52a1\u5668<\/span>
      \n clientSocket.<\/span>send<\/span>(<\/span>requestPacket)<\/span>;<\/span><\/p>\n

    • \u6784\u9020\u4e00\u4e2a \u6570\u636e\u62a5 \u7528\u6765\u63a5\u53d7\u670d\u52a1\u5668 \u8fd4\u56de\u7684\u54cd\u5e94<\/li>\n

      \/\/ \u6784\u9020\u4e00\u4e2a\u6570\u636e\u5305\u57fa\u672c\u5355\u4f4d\u63a5\u53d7\u670d\u52a1\u5668\u7684\u54cd\u5e94<\/span>
      \n DatagramPacket<\/span> receivePacket =<\/span> new<\/span> DatagramPacket<\/span>(<\/span>
      \nnew<\/span> byte<\/span>[<\/span>4096<\/span>]<\/span>,<\/span>4096<\/span>)<\/span>;<\/span><\/p>\n

      \/\/ \u5f00\u59cb\u63a5\u6536<\/span>
      \n clientSocket.<\/span>receive<\/span>(<\/span>receivePacket)<\/span>;<\/span><\/p>\n

    • \u6253\u5370 \u670d\u52a1\u5668\u54cd\u5e94 \u7684\u65e5\u5fd7<\/li>\n

      \/\/ \u8f93\u51fa\u65e5\u5fd7
      \n String receive =new String(receivePacket.getData(),
      \n0, receivePacket.getLength());<\/p>\n

      System.out.println(receive);<\/p>\n

      \u9c7c\u5f0f\u75af\u8a00<\/h3>\n

      \u8865\u5145\u7ec6\u8282 ：<\/p>\n

    • \u5bf9\u4e8e\u5ba2\u6237\u7aef\u8fd9\u7aef\u6765\u8bf4， \u5f53 \u5b9e\u4f8b\u5316Socket \u65f6， \u662f\u4e0d\u9700\u8981\u6307\u5b9a \u7aef\u53e3\u53f7 \u7684， \u56e0\u4e3a\u7cfb\u7edf\u5c31\u6839\u636e\u5ba2\u6237\u7aef\u7684 \u7a7a\u7f3a\u7684\u7aef\u53e3\u53f7 \u81ea\u52a8\u9ed8\u8ba4\u5206\u914d \u4e00\u4e2a\u7aef\u53e3\u53f7 \u3002 \u5982\u679c \u7a0b\u5e8f\u733f\u6765 \u5206\u914d\u5206\u914d\u8fdb\u7a0b \u5c31\u6709\u53ef\u80fd\u9020\u6210 \u67d0\u4e2a\u7aef\u53e3\u53f7\u6b63\u5728\u5fd9\u788c， \u5c31\u4f1a\u51fa\u73b0 \u4e00\u4e2a\u7aef\u53e3\u53f7\u7ed1\u5b9a\u591a\u4e2a\u8fdb\u7a0b \u7684\u60c5\u51b5，\u5c31\u4f1a\u53c2\u751f BUG \u3002<\/li>\n
    • \u7531\u4e8e\u6211\u4eec\u4f20\u5165\u7684IP \u5730\u5740\u662f \u4e00\u4e2a\u5b57\u7b26\u4e32 ， \u6211\u4eec\u5c31\u9700\u8981\u8f6c\u6362\u4e3a\u5bf9\u4e8e\u7684 \u70b9\u5206\u5341\u8fdb\u5236 \u7684\u5730\u5740\u8868\u793a\u65b9\u5f0f： InetAddress.getByName(this.serverIp)<\/li>\n
    • \u5f02\u5e38 SocketException \u5c5e\u4e8e IOException \u7684 \u5b50\u7c7b<\/li>\n

      \u56db. \u56de\u663e\u670d\u52a1\u5668\u7684\u539f\u7406\u5256\u6790\u53ca\u6269\u5c55\u5b57\u5178\u670d\u52a1\u5668\u529f\u80fd<\/h2>\n

      1. \u56de\u663e\u670d\u52a1\u5668\u7684\u539f\u7406\u5256\u6790<\/h3>\n

      \u5177\u4f53 \u56de\u663e\u670d\u52a1\u5668 \u7684\u6d41\u7a0b\u5c0f\u7f16\u7528 \u56fe\u793a \u7684\u65b9\u5f0f\u8868\u793a\u5566，<\/p>\n

        \n
      • \n

        \u670d\u52a1\u7aef\u7b49\u5f85\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n

      • \n

        \u5ba2\u6237\u7aef\u53d1\u9001\u4ee5\u53ca\u963b\u585e\u7b49\u5f85：<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n

      • \n

        \u8fd4\u56de\u5ba2\u6237\u7aef\u7684\u54cd\u5e94： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n

      • \n

        \u6574\u4f53\u7684\u6d41\u7a0b: \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/li>\n<\/ul>\n

        \u9c7c\u5f0f\u75af\u8a00<\/h3>\n
      • \u4ece\u6784\u9020\u6570\u636e\u62a5\u7684\u5185\u5bb9，\u6211\u4eec\u53ef\u4ee5\u770b\u51fa Udp \u662f \u9762\u5411\u6570\u636e\u62a5 \u7684\u7279\u70b9<\/li>\n
      • \u4ece\u6bcf\u6b21\u53d1\u9001\u8bf7\u6c42，\u6216\u8005\u8fd4\u56de\u54cd\u5e94\u90fd\u9700\u8981 \u8bbe\u5b9aIP\u5730\u5740\u548c\u7aef\u53e3\u53f7 , \u53ef\u4ee5\u770b\u51fa Udp \u65e0\u8fde\u63a5\u9700\u8981\u624b\u52a8\u8bbe\u7f6e IP \u548c\u7aef\u53e3\u53f7 \u7684\u7279\u70b9\u3002<\/li>\n
      • \u4ece\u5ba2\u6237\u7aef \u65e2\u53ef\u4ee5\u53d1\u9001\u8bf7\u6c42\u53c8\u53ef\u4ee5\u63a5\u6536\u54cd\u5e94 ， \u5e76\u4e14 \u670d\u52a1\u5668\u65e2\u53ef\u4ee5\u63a5\u6536\u8bf7\u6c42，\u53d1\u9001\u54cd\u5e94 ， \u5145\u5206\u8bf4\u660e Udp\u662f \u5168\u53cc\u5de5\u4f20\u8f93 \u7684\u7279\u70b9\u3002<\/li>\n

        \u5173\u4e8e Udp \u4e0d\u53ef\u9760\u4f20\u8f93 \u8fd9\u4e2a\u7279\u70b9，\u8fd9\u662f\u4e00\u4e2a\u96be\u70b9\u4e5f\u662f\u91cd\u70b9， \u5c0f\u7f16\u4f1a\u5728\u540e\u9762\u7684\u6587\u7ae0\u4e2d\u91cd\u70b9\u8be6\u7ec6\u7684<\/p>\n

        2. \u5b57\u5178\u670d\u52a1\u5668\u529f\u80fd<\/h3>\n

        \u670d\u52a1\u5668:<\/p>\n

        package<\/span> network<\/span>;<\/span><\/p>\n

        import<\/span> java.<\/span>io.<\/span><\/span>IOException<\/span><\/span>;<\/span>
        \nimport<\/span> java.<\/span>net.<\/span><\/span>SocketException<\/span><\/span>;<\/span>
        \nimport<\/span> java.<\/span>util.<\/span><\/span>HashMap<\/span><\/span>;<\/span>
        \nimport<\/span> java.<\/span>util.<\/span><\/span>Map<\/span><\/span>;<\/span><\/p>\n

        public<\/span> class<\/span> MyDicServer<\/span> extends<\/span> MyServer<\/span>{<\/span><\/p>\n

        private<\/span> Map<\/span><<\/span>String<\/span>,<\/span>String<\/span>><\/span><\/span> map =<\/span> new<\/span> HashMap<\/span><<\/span>><\/span><\/span>(<\/span>)<\/span>;<\/span><\/p>\n

        public<\/span> MyDicServer<\/span>(<\/span>int<\/span> port)<\/span> throws<\/span> SocketException<\/span> {<\/span>
        \n super<\/span>(<\/span>port)<\/span>;<\/span>
        \n map.<\/span>put<\/span>(<\/span>"cat"<\/span>,<\/span>"\u5c0f\u732b"<\/span>)<\/span>;<\/span>
        \n map.<\/span>put<\/span>(<\/span>"dog"<\/span>,<\/span> "\u5c0f\u72d7"<\/span>)<\/span>;<\/span>
        \n map.<\/span>put<\/span>(<\/span>"dusk"<\/span>,<\/span> "\u5c0f\u9e2d"<\/span>)<\/span>;<\/span>
        \n }<\/span><\/p>\n

        @Override<\/span>
        \n public<\/span> String<\/span> process<\/span>(<\/span>String<\/span> request)<\/span> {<\/span>
        \n return<\/span> map.<\/span>getOrDefault<\/span>(<\/span>request,<\/span>"\u672a\u77e5\u5355\u8bcd"<\/span>)<\/span>;<\/span>
        \n }<\/span><\/p>\n

        public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> IOException<\/span> {<\/span>
        \n MyServer<\/span> m =<\/span> new<\/span> MyDicServer<\/span>(<\/span>9090<\/span>)<\/span>;<\/span>
        \n m.<\/span>start<\/span>(<\/span>)<\/span>;<\/span>
        \n }<\/span>
        \n}<\/span><\/p>\n

        \u5ba2\u6237\u7aef：<\/p>\n

        package<\/span> network<\/span>;<\/span><\/p>\n

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

        public<\/span> class<\/span> MyServer<\/span> {<\/span><\/p>\n

        \/\/ \u5b9a\u4e49\u4e00\u4e2a \u6570\u636e\u5305\u63d2\u53e3<\/span>
        \n private<\/span> DatagramSocket<\/span> socker =<\/span> null<\/span>;<\/span><\/p>\n

        \/\/ \u6784\u9020\u65b9\u6cd5<\/span>
        \n public<\/span> MyServer<\/span>(<\/span>int<\/span> port)<\/span> throws<\/span> SocketException<\/span> {<\/span>
        \n \/\/ \u8fdb\u884c\u8fdb\u7a0b\u548c \u7aef\u53e3\u53f7\u7684\u8fde\u63a5<\/span>
        \n socker =<\/span> new<\/span> DatagramSocket<\/span>(<\/span>port)<\/span>;<\/span><\/p>\n

        }<\/span><\/p>\n

        public<\/span> void<\/span> start<\/span>(<\/span>)<\/span> throws<\/span> IOException<\/span> {<\/span><\/p>\n

        while<\/span>(<\/span>true<\/span>)<\/span> {<\/span>
        \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u670d\u52a1\u5668\u5f00\u59cb\u8fd0\u884c…"<\/span>)<\/span>;<\/span><\/p>\n

        \/\/ \u6253\u5305\u6570\u636e\u5305\u57fa\u672c\u5355\u4f4d<\/span>
        \n DatagramPacket<\/span> requestPacket =<\/span>
        \n new<\/span> DatagramPacket<\/span>(<\/span>new<\/span> byte<\/span>[<\/span>4096<\/span>]<\/span>,<\/span>
        \n 4096<\/span> )<\/span>;<\/span><\/p>\n

        \/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e<\/span>
        \n socker.<\/span>receive<\/span>(<\/span>requestPacket)<\/span>;<\/span><\/p>\n

        \/\/ \u8f6c\u4e3a\u6210\u5b57\u7b26\u4e32\u6253\u5370\u65e5\u5fd7<\/span>
        \n String<\/span> request =<\/span> new<\/span> String<\/span>(<\/span>requestPacket.<\/span>getData<\/span>(<\/span>)<\/span>,<\/span>
        \n 0<\/span>,<\/span> requestPacket.<\/span>getLength<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

        \/\/ \u6267\u884c\u4e1a\u52a1\u903b\u8f91\u5e76\u5bf9\u5ba2\u6237\u7aef\u8fdb\u884c\u54cd\u5e94<\/span>
        \n String<\/span> response =<\/span> process<\/span>(<\/span>request)<\/span>;<\/span><\/p>\n

        \/\/ \u6253\u5305\u4e00\u7ec4\u54cd\u5e94\u7684\u6570\u636e\u5305<\/span>
        \n\/\/ \u6ce8\u610f\u8fd9\u91cc\u8981\u5e26\u4e0a\u5bf9\u5e94\u5ba2\u6237\u7aef\u8f93\u5165\u7684ip\u5730\u5740\u548c\u7aef\u53e3\u53f7<\/span>
        \n DatagramPacket<\/span> responsePacket =<\/span> new<\/span>
        \n DatagramPacket<\/span>(<\/span>response.<\/span>getBytes<\/span>(<\/span>)<\/span>,<\/span>0<\/span>,<\/span>
        \n response.<\/span>getBytes<\/span>(<\/span>)<\/span>.<\/span>length,<\/span>
        \n requestPacket.<\/span>getSocketAddress<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

        \/\/ \u8fdb\u884c\u54cd\u5e94\u56de\u670d\u52a1\u5668\u4e2d<\/span>
        \n socker.<\/span>send<\/span>(<\/span>responsePacket)<\/span>;<\/span><\/p>\n

        \/\/ \u6253\u5370\u65e5\u5fd7<\/span>
        \n System<\/span>.<\/span>out.<\/span>printf<\/span>(<\/span>"[<\/span>ip\u5730\u5740\u4e3a：%<\/span>s,<\/span> %<\/span>s,<\/span>\u7aef\u53e3\u53f7\u4e3a：
        \n %<\/span>d,<\/span> %<\/span>d \u5ba2\u6237\u7aef\u7684\u7684\u9700\u6c42\u7684\u4e3a:<\/span> %<\/span>s,<\/span> \u670d\u52a1\u5668\u7684\u54cd\u5e94\u4e3a:<\/span> %<\/span>s]<\/span>\\\\n",<\/span><\/p>\n

        requestPacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span>
        \n responsePacket.<\/span>getAddress<\/span>(<\/span>)<\/span>,<\/span><\/p>\n

        responsePacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span>
        \n requestPacket.<\/span>getPort<\/span>(<\/span>)<\/span>,<\/span><\/p>\n

        request,<\/span> response)<\/span>;<\/span>
        \n }<\/span>
        \n }<\/span><\/p>\n

        \/\/ \u4e1a\u52a1\u903b\u8f91\u7684\u65b9\u6cd5<\/span>
        \n public<\/span> String<\/span> process<\/span>(<\/span>String<\/span> request)<\/span> {<\/span>
        \n return<\/span> request;<\/span>
        \n }<\/span><\/p>\n

        public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> IOException<\/span>{<\/span>
        \n MyServer<\/span> myServer =<\/span> new<\/span> MyServer<\/span>(<\/span>9090<\/span>)<\/span>;<\/span>
        \n myServer.<\/span>start<\/span>(<\/span>)<\/span>;<\/span>
        \n }<\/span>
        \n}<\/span><\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

        \u5b57\u5178\u670d\u52a1\u5668\u5c0f\u7f16\u5728\u8fd9\u91cc\u53ea\u662f\u4f5c\u4e3a\u6269\u5c55\u5185\u5bb9， \u5176\u5b9e\u64cd\u4f5c\u8fdc\u4e0d\u6b62\u8fd9\u91cc， \u81f3\u4e8e\u5b57\u5178\u670d\u52a1\u5668\u600e\u4e48\u751f\u6210\u7684？<\/p>\n

        \u5176\u5b9e\u5f88\u7b80\u5355， \u53ea\u662f\u5728\u539f\u6765\u7684\u57fa\u7840\u4e0a\u52a0\u5165\u4e86\u4e00\u4e2a \u54c8\u5e0c\u8868 \u8fdb\u884c\u8fd4\u56de， \u5373\u4f7f\u4e0d\u7406\u89e3\u7684\u5c0f\u4f19\u4f34\u4e5f\u65e0\u59a8， \u91cd\u8981\u662f\u7406\u89e3\u524d\u9762Udp \u7684\u56de\u663e\u670d\u52a1\u5668\u7684 \u5b9e\u73b0\u539f\u7406 \u5373\u53ef\u3002<\/p>\n

        \u603b\u7ed3<\/h2>\n
          \n
        • \n

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