{"id":35048,"date":"2025-05-02T07:10:44","date_gmt":"2025-05-01T23:10:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35048.html"},"modified":"2025-05-02T07:10:44","modified_gmt":"2025-05-01T23:10:44","slug":"udp%e6%95%b0%e6%8d%ae%e5%8c%85%e5%92%8ctcp%e6%95%b0%e6%8d%ae%e5%8c%85%e7%9a%84%e5%8c%ba%e5%88%ab%ef%bc%9b%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e5%a5%97%e6%8e%a5%e5%ad%97%ef%bc%9b%e4%b8%8d%e5%90%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35048.html","title":{"rendered":"UDP\u6570\u636e\u5305\u548cTCP\u6570\u636e\u5305\u7684\u533a\u522b\uff1b\u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57\uff1b\u4e0d\u540c\u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\u4e00\u3001UDP \u6570\u636e\u5305\u4e0e TCP \u6570\u636e\u5305\u7684\u533a\u522b：<\/p>\n

\u00a0\u8fde\u63a5\u65b9\u9762：<\/p>\n

\u4f20\u8f93\u65b9\u9762：<\/p>\n

\u9762\u5411\u5bf9\u8c61：<\/p>\n

\u53cc\u5de5\u6a21\u5f0f：<\/p>\n

\u4e8c\u3001UDP \u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57；\u57fa\u4e8e UDP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668：<\/p>\n

1. UDP \u6570\u636e\u62a5\u5957\u63a5\u5b57\u6838\u5fc3\u7c7b<\/p>\n

DatagramSocket ：<\/p>\n

DatagramPacket ：<\/p>\n

2.\u57fa\u4e8e UDP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668<\/p>\n

\u670d\u52a1\u5668：<\/p>\n

\u5ba2\u6237\u7aef：<\/p>\n

\u7ee7\u627f EchoServer \u670d\u52a1\u5668\u7684\u5e26\u6709\u67e5\u8be2\u5355\u8bcd\u529f\u80fd\u7684\u670d\u52a1\u5668：<\/p>\n

\u4e09\u3001TCP \u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57；\u57fa\u4e8e TCP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668：<\/p>\n

1.TCP \u6570\u636e\u62a5\u5957\u63a5\u5b57\u6838\u5fc3\u7c7b<\/p>\n

ServerSocket：<\/p>\n

Socket：<\/p>\n

2.\u57fa\u4e8e TCP\u00a0\u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668<\/p>\n

\u670d\u52a1\u5668：<\/p>\n

\u5ba2\u6237\u7aef：<\/p>\n

\n

\u4e00\u3001UDP \u6570\u636e\u5305\u4e0e TCP \u6570\u636e\u5305\u7684\u533a\u522b：<\/h2>\n

\u00a0\u8fde\u63a5\u65b9\u9762：<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 UDP：\u662f\u65e0\u8fde\u63a5\u534f\u8bae\u3002\u5b83\u4e0d\u9700\u8981\u4e8b\u5148\u5efa\u7acb\u8fde\u63a5\u5c31\u53ef\u4ee5\u76f4\u63a5\u53d1\u9001\u6570\u636e，\u5c31\u50cf\u5199\u4fe1\u4e00\u6837，\u76f4\u63a5\u628a\u4fe1\u5bc4\u51fa\u53bb，\u4e0d\u9700\u8981\u5148\u548c\u5bf9\u65b9\u6253\u62db\u547c\u8bf4\u8981\u5bc4\u4fe1\u4e86\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP：\u662f\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\u3002\u5728\u6570\u636e\u4f20\u8f93\u4e4b\u524d，\u9700\u8981\u5728\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u4e4b\u95f4\u5efa\u7acb\u4e00\u6761\u8fde\u63a5，\u5c31\u50cf\u6253\u7535\u8bdd\u4e00\u6837，\u5148\u62e8\u53f7\u5efa\u7acb\u8fde\u63a5，\u7136\u540e\u624d\u80fd\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u8fd9\u4e2a\u8fde\u63a5\u5efa\u7acb\u7684\u8fc7\u7a0b\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u6765\u5b8c\u6210，\u786e\u4fdd\u53cc\u65b9\u90fd\u505a\u597d\u4e86\u6570\u636e\u4f20\u8f93\u7684\u51c6\u5907\u3002<\/p>\n<\/p>\n

\u7c7b\u6bd4\u793a\u4f8b<\/span>：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UDP： \u5c31\u50cf\u53d1\u77ed\u4fe1\u76f4\u63a5\u53d1\u9001，\u65e0\u9700\u786e\u8ba4\u5bf9\u65b9\u662f\u5426\u5728\u7ebf\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP： \u5c31\u50cf\u6253\u7535\u8bdd\u4e00\u6837，\u9700\u8981\u5148\u62e8\u53f7\u63a5\u901a\u540e，\u518d\u901a\u8bdd\u3002<\/p>\n<\/p>\n

\u4f20\u8f93\u65b9\u9762：<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UDP：\u662f\u4e0d\u53ef\u9760\u4f20\u8f93\u3002UDP \u4e0d\u786e\u4fdd\u6570\u636e\u4e00\u5b9a\u80fd\u5230\u8fbe\u63a5\u6536\u7aef，\u4e5f\u4e0d\u786e\u4fdd\u6570\u636e\u7684\u987a\u5e8f\u548c\u5b8c\u6574\u6027，\u5b83\u53ea\u662f\u5c06\u6570\u636e\u5305\u53d1\u9001\u51fa\u53bb，\u4e0d\u5173\u5fc3\u662f\u5426\u88ab\u6210\u529f\u63a5\u6536\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP：\u662f\u53ef\u9760\u4f20\u8f93\u3002\u4ed6\u901a\u8fc7\u786e\u8ba4\u673a\u5236\u3001\u91cd\u4f20\u673a\u5236\u7b49\u4fdd\u8bc1\u6570\u636e\u80fd\u591fu\u51c6\u786e\u65e0\u8bef\u5730\u5230\u8fbe\u63a5\u6536\u7aef\u3002\u5982\u679c\u6570\u636e\u5305\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e22\u5931\u6216\u635f\u574f，TCP \u4f1a\u81ea\u52a8\u91cd\u4f20，\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u987a\u5e8f\u6027\u3002<\/p>\n<\/p>\n

\u4f7f\u7528\u793a\u4f8b<\/span>：<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 UDP：\u76f4\u64ad\u548c\u5728\u7ebf\u5927\u578b\u6e38\u620f\u5927\u591a\u6570\u90fd\u662f\u7528\u4e86 UDP \u6570\u636e\u5305\u534f\u8bae,\u5141\u8bb8\u5c11\u91cf\u4e22\u5305，\u6216\u8005\u4f46\u8981\u6c42\u4f4e\u5ef6\u8fdf\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP：\u6587\u4ef6\u4f20\u8f93\u5fc5\u987b\u786e\u4fdd\u6bcf\u4e2a\u5b57\u8282\u6b63\u786e\u5230\u8fbe\u3002<\/p>\n<\/p>\n

\u9762\u5411\u5bf9\u8c61：<\/h3>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UDP：\u9762\u5411\u6570\u636e\u62a5，\u6570\u636e\u4ee5\u72ec\u7acb\u6570\u636e\u5305\u4e3a\u5355\u4f4d\u4f20\u8f93，\u6bcf\u4e2a\u5305\u6709\u660e\u786e\u7684\u8fb9\u754c，\u4e14\u63a5\u6536\u65b9\u4e00\u6b21\u8bfb\u53d6\u4e00\u4e2a\u5b8c\u6574\u7684\u6570\u636e\u5305\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP：\u9762\u5411\u5b57\u8282\u6d41\u3002\u4ed6\u628a\u5f15\u7528\u7a0b\u5e8f\u4ea4\u4e0b\u6765\u7684\u6570\u636e\u770b\u6210\u662f\u4e00\u8fde\u4e32\u7684\u65e0\u7ed3\u6784\u7684\u5b57\u8282\u6d41，\u5c31\u50cf\u6d41\u6c34\u4e00\u6837，TCP \u4f1a\u6309\u7167\u987a\u5e8f\u5c06\u8fd9\u4e9b\u5b57\u8282\u6d41\u53d1\u9001\u51fa\u53bb，\u5e76\u5728\u63a5\u6536\u7aef\u6309\u7167\u540c\u6837\u7684\u987a\u5e8f\u8fd8\u539f\u3002<\/p>\n<\/p>\n

\u53cc\u5de5\u6a21\u5f0f：<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 UDP：\u652f\u6301\u5168\u53cc\u5de5\u901a\u4fe1\u3002\u540c\u4e00\u65f6\u95f4\u5185，\u6570\u636e\u5728\u4e24\u4e2a\u65b9\u5411\u4e0a\u8fdb\u884c\u8fd0\u8f93，\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u53ef\u4ee5\u540c\u65f6\u53d1\u9001\u548c\u63a5\u6536 UDP \u6570\u636e\u5305\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 TCP：\u652f\u6301\u5168\u53cc\u5de5\u901a\u4fe1\u3002\u5728\u540c\u4e00\u8fde\u63a5\u4e2d，\u6570\u636e\u53ef\u4ee5\u540c\u65f6\u5728\u4e24\u4e2a\u65b9\u5411\u4e0a\u8fdb\u884c\u4f20\u8f93，\u5373\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u53ef\u4ee5\u540c\u65f6\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e，\u5c31\u50cf\u4e24\u4e2a\u4eba\u540c\u65f6\u6253\u7535\u8bdd，\u53cc\u65b9\u90fd\u53ef\u4ee5\u8bf4\u8bdd\u548c\u503e\u542c\u3002<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n

\u4e8c\u3001UDP \u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57；\u57fa\u4e8e UDP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668：<\/h2>\n

1. UDP \u6570\u636e\u62a5\u5957\u63a5\u5b57\u6838\u5fc3\u7c7b<\/h3>\n

DatagramSocket ：<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u4e2a\u7c7b\u7528\u4e8e\u53d1\u9001\u548c\u63a5\u6536 UDP \u6570\u636e\u62a5<\/span>\u7684\u5957\u63a5\u5b57\u3002（\u7c7b\u4f3c\u4e8e\u8f66\u8f86，\u8d1f\u8d23\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u62a5）<\/p>\n<\/p>\n

DatagramSocket \u6784\u9020\u65b9\u6cd5：<\/p>\n\n\n\n\n\n
\u65b9\u6cd5\u7b7e\u540d<\/td>\n\u53c2\u6570\u8bf4\u660e<\/td>\n\u7528\u9014<\/td>\n<\/tr>\n
DatagramSocket（ ）<\/td>\n\u65e0\u53c2\u6570<\/td>\n\u7ed1\u5b9a\u5230\u672c\u673a\u7684\u4efb\u610f\u4e00\u4e2a\u968f\u673a\u7aef\u53e3（\u4e00\u822c\u7528\u4e8e\u5ba2\u6237\u7aef）<\/td>\n<\/tr>\n
DatagramSocket（int port ）<\/td>\nport : \u7ed1\u5b9a\u7684\u7aef\u53e3\u53f7<\/td>\n\u7ed1\u5b9a\u5230\u672c\u673a\u6307\u5b9a\u7684\u7aef\u53e3（\u4e00\u822c\u7528\u4e8e\u670d\u52a1\u7aef）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

DatagramSocket \u5b9e\u4f8b\u65b9\u6cd5：<\/p>\n\n\n\n\n\n\n
\u65b9\u6cd5<\/td>\n\u53c2\u6570\u8bf4\u660e<\/td>\n\u7528\u9014<\/td>\n<\/tr>\n
receive（ DatagramPacket\u00a0 p ）<\/td>\np : \u63a5\u6536\u6570\u636e\u5305\u7684\u5bb9\u5668<\/td>\n\u7528\u4e8e\u63a5\u6536\u6570\u636e\u62a5（\u5982\u679c\u6ca1\u6709\u63a5\u6536\u5230\u6570\u636e\u62a5，\u8be5\u65b9\u6cd5\u4f1a\u963b\u585e\u7b49\u5f85）<\/td>\n<\/tr>\n
send（ DatagramPacket\u00a0 p ）<\/td>\np : \u8981\u53d1\u9001\u7684\u6570\u636e\u5305<\/td>\n\u7528\u4e8e\u53d1\u9001\u6570\u636e\u5305（\u4e0d\u4f1a\u963b\u585e\u7b49\u5f85，\u76f4\u63a5\u53d1\u9001 UDP \u6570\u636e\u62a5）<\/td>\n<\/tr>\n
close（ ）<\/td>\n\u65e0<\/td>\n\u5173\u95ed\u6570\u636e\u62a5\u5957\u63a5\u5b57<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/p>\n

DatagramPacket ：<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u8fd9\u4e2a\u7c7b\u7528\u4e8e\u5c01\u88c5 UDP \u6570\u636e\u62a5\u7684\u5bb9\u5668<\/span>\u3002（\u7c7b\u4f3c\u4e8e\u8f66\u8f86\u4e0a\u7684\u5305\u88f9，\u8d1f\u8d23\u5b58\u50a8\u8981\u8fd0\u8f93\u7684\u6570\u636e\u5305）<\/p>\n<\/p>\n

DatagramPacket \u6784\u9020\u65b9\u6cd5：（\u63a5\u6536\u7528）<\/p>\n

DatagramPacket(byte[] buf,int length) <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6784\u9020\u4e00\u4e2a\u00a0DatagramPacket \u4ee5\u7528\u4e8e\u63a5\u6536\u6570\u636e\u62a5，\u63a5\u6536\u7684\u6570\u636e\u4fdd\u5b58\u5728\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4 buf \u4e2d，\u548c\u6700\u591a\u63a5\u6536\u7684\u5b57\u8282\u6570 length \u3002<\/p>\n<\/p>\n

DatagramPacket \u6784\u9020\u65b9\u6cd5：（\u53d1\u9001\u7528）<\/p>\n

\/\/\u7b2c\u4e00\u79cd
\nDatagramPacket(byte[] buf,int offset,int length,InetAddress address, int port)<\/p>\n

\/\/\u7b2c\u4e8c\u79cd
\nDatagramPacket(byte[] buf,int offset,int length,SocketAddress address) <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6784\u9020\u4e00\u4e2a\u00a0DatagramPacket \u4ee5\u7528\u4e8e\u53d1\u9001\u6570\u636e\u62a5，\u8981\u53d1\u9001\u6570\u636e\u5728\u5b57\u8282\u6570\u7ec4 buf \u4e2d，\u4ece \u504f\u79fb\u91cf offset \u5f00\u59cb，\u53d1\u9001 length \u4e2a\u957f\u5ea6\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0InetAddress \u662f\u4e00\u4e2a\u5177\u4f53\u7c7b，\u53ef\u4ee5\u76f4\u63a5\u5b9e\u4f8b\u5316\u3002SocketAddress\u00a0\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b，\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316，\u9700\u8981\u501f\u52a9\u5b83\u7684\u5177\u4f53\u5b50\u7c7b（\u00a0InetSocketAddress）\u6765\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b2c\u4e00\u79cd\u65b9\u6cd5\u7684 address <\/span>\u53ef\u4ee5\u8fd9\u4e48\u6784\u9020：<\/p>\n

InetAddress address = InetAddress.getByName("\u76ee\u6807\u5730\u5740"); <\/p>\n

\u00a0\u00a0 \u00a0 \u00a0\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u7684 address <\/span>\u53ef\u4ee5\u8fd9\u4e48\u6784\u9020：<\/p>\n

SocketAddress socketAddress = new InetSocketAddress("\u76ee\u6807\u5730\u5740", \u7aef\u53e3\u53f7); <\/p>\n<\/p>\n

DatagramPacket \u5b9e\u4f8b\u65b9\u6cd5：<\/p>\n\n\n\n\n\n\n
\u65b9\u6cd5<\/td>\n\u8bf4\u660e<\/td>\n<\/tr>\n
getAddress（ ）<\/td>\n\u4ece\u63a5\u6536\u7684\u6570\u636e\u62a5\u4e2d，\u83b7\u53d6\u53d1\u9001\u7aef\u4e3b\u673a\u7684 ip \u5730\u5740；\u6216\u4ece\u53d1\u9001\u7684\u6570\u636e\u62a5\u4e2d，\u83b7\u53d6\u63a5\u6536\u7aef\u4e3b\u673aIP\u5730\u5740<\/td>\n<\/tr>\n
getPort ( )<\/td>\n\u4ece\u63a5\u6536\u7684\u6570\u636e\u62a5\u4e2d，\u83b7\u53d6\u53d1\u9001\u7aef\u4e3b\u673a\u7684\u7aef\u53e3\u53f7；\u6216\u4ece\u53d1\u9001\u7684\u6570\u636e\u62a5\u4e2d，\u83b7\u53d6\u63a5\u6536\u7aef\u4e3b\u673a\u7aef\u53e3\u53f7<\/td>\n<\/tr>\n
getSocketAddress ( )<\/td>\n\u83b7\u53d6\u53d1\u9001\u65b9\u6216\u63a5\u6536\u65b9\u7684\u5957\u63a5\u5b57\u5730\u5740，\u8fd4\u56de\u4e00\u4e2a\u00a0SocketAddress\u00a0\u5bf9\u8c61（\u4e0a\u9762\u7684DatagramPacket \u6784\u9020\u65b9\u6cd5：（\u53d1\u9001\u7528）\u6709\u4e00\u4e2a\u53c2\u6570SocketAddress address \u5c31\u662f\u8fd9\u4e2a，DatagramPacket.getSocketAddress()\u00a0\u65b9\u6cd5\u80fd\u591f\u83b7\u53d6\u5230\u5305\u542b IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u7684\u4fe1\u606f）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/p>\n<\/p>\n<\/p>\n

2.\u57fa\u4e8e UDP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668<\/h3>\n

\u670d\u52a1\u5668：<\/h4>\n

public class EchoServer {<\/p>\n

\/\/\u521b\u5efa socket \u5bf9\u8c61
\n private DatagramSocket socket;<\/p>\n

\/\/\u6784\u9020\u65b9\u6cd5
\n public EchoServer(int port) throws SocketException {
\n socket = new DatagramSocket(port);
\n }<\/p>\n

\/\/\u542f\u52a8\u670d\u52a1\u5668，\u5b8c\u6210\u4e3b\u8981\u7684\u4e1a\u52a1\u903b\u8f91
\n public void start() throws IOException {
\n System.out.println();
\n System.out.println("\u670d\u52a1\u5668\u542f\u52a8！");<\/p>\n

\/\/\u670d\u52a1\u566824\u5c0f\u65f6\u4e0d\u95f4\u65ad\u7684\u670d\u52a1
\n while(true) {
\n \/\/\u4e00\u3001\u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790
\n \/\/1.\u521b\u5efa\u4e00\u4e2a\u7a7a\u767d\u7684 DatagramPacket \u5bf9\u8c61
\n DatagramPacket reqPacket = new DatagramPacket(new byte[4096],4096);
\n \/\/2.\u901a\u8fc7 receive \u8bfb\u53d6\u7f51\u5361\u7684\u6570\u636e，\u5982\u679c\u7f51\u5361\u6ca1\u6709\u6536\u5230\u6570\u636e，\u5c31\u4f1a\u963b\u585e\u7b49\u5f85\u3002
\n socket.receive(reqPacket);
\n \/\/3.\u628a DatagramPacket \u4e2d\u7684\u6570\u636e\u89e3\u6790\u6210\u5b57\u7b26\u4e32，\u53ea\u9700\u8981\u4ece DatagramPacket \u53d6\u5230\u6709\u6548\u7684\u6570\u636e\u5373\u53ef\u3002
\n String request = new String(reqPacket.getData(),0,reqPacket.getLength());<\/p>\n

\/\/\u4e8c\u3001\u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94
\n String response = process(request);<\/p>\n

\/\/\u4e09\u3001\u628a\u54cd\u5e94\u5199\u56de\u5230\u5ba2\u6237\u7aef
\n \/\/1.\u628a\u54cd\u5e94\u6784\u9020\u6210 DatagramPacket \u5bf9\u8c61
\n DatagramPacket resPacket = new DatagramPacket(
\n response.getBytes(),
\n response.getBytes().length,
\n \/\/\u83b7\u53d6\u5230\u53d1\u9001\u65b9\u7684 IP \u5730\u5740\u548c\u7aef\u53e3\u53f7
\n reqPacket.getSocketAddress()
\n );
\n \/\/2.\u628a DatagramPacket \u5199\u56de\u5230\u5ba2\u6237\u7aef\u3002
\n socket.send(resPacket);<\/p>\n

\/\/\u56db\u3001\u6253\u5370\u65e5\u5fd7
\n System.out.printf("[%s:%d] req:%s, resp:%s\\\\n",
\n reqPacket.getAddress(), reqPacket.getPort(), request, response);
\n }
\n }<\/p>\n

\/\/\u7531\u4e8e\u8fd9\u91cc\u5b9e\u73b0\u7684\u662f \u201c \u56de\u663e\u670d\u52a1\u5668 \u201d ，\u6240\u4ee5\u54cd\u5e94\u548c\u8bf7\u6c42\u662f\u4e00\u6837\u7684，\u8fd9\u91cc\u76f4\u63a5\u8fd4\u56de\u8bf7\u6c42\u5373\u53ef\u3002
\n private String process(String request) {
\n return request;
\n }<\/p>\n

\/\/\u542f\u52a8\u670d\u52a1\u5668
\n public static void main(String[] args) throws IOException {
\n EchoServer server = new EchoServer(9090);
\n server.start();
\n }<\/p>\n

} <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6240\u4ee5\u53ef\u4ee5\u770b\u5230\u670d\u52a1\u5668\u5904\u7406\u7684\u57fa\u672c\u6d41\u7a0b\u662f：\u5148\u6784\u9020\u4e00\u4e2a DatagramSocker \u5bf9\u8c61\u5b9e\u4f8b\u7528\u4e8e\u53d1\u9001\u6570\u636e\u5305\u3002DatagramSocker \u8bfb\u53d6\u8bf7\u6c42\u4e4b\u524d\u5148\u6784\u9020\u4e00\u4e2a\u7528\u4e8e\u8bfb\u53d6\u6570\u636e\u62a5\u7684 DatagramPacket \u5bf9\u8c61，\u7ecf\u8fc7\u5904\u7406\u540e，\u518d\u65b0\u6784\u9020\u4e00\u4e2a\u7528\u4e8e\u53d1\u9001\u6570\u636e\u62a5\u7684 DatagramPacket \u5bf9\u8c61，\u518d\u901a\u8fc7 DatagramSocker \u5bf9\u8c61\u5b9e\u4f8b\u53d1\u9001\u6570\u636e\u5305\u3002<\/span><\/p>\n<\/p>\n

\u5ba2\u6237\u7aef：<\/h4>\n

public class EchoClient {
\n private DatagramSocket socket = null;
\n private String serverIp;
\n private int serverPort;<\/p>\n

\/\/ \u521d\u59cb\u5316\u670d\u52a1\u5668\u7684 ip \u548c \u670d\u52a1\u5668\u7684\u7aef\u2f1d.
\n public EchoClient(String serverIp, int serverPort) throws SocketException {
\n this.serverIp = serverIp;
\n this.serverPort = serverPort;
\n \/\/ \u8fd9\u4e2a new \u64cd\u4f5c, \u5c31\u4e0d\u518d\u6307\u5b9a\u5ba2\u6237\u7aef\u7684\u7aef\u2f1d\u4e86. \u8ba9\u7cfb\u7edf\u2f83\u52a8\u5206\u914d\u2f00\u4e2a\u7a7a\u95f2\u7aef\u2f1d.
\n socket = new DatagramSocket();
\n }<\/p>\n

public void start() throws IOException {
\n Scanner scanner = new Scanner(System.in);<\/p>\n

System.out.println("\u5ba2\u6237\u7aef\u542f\u52a8！");
\n while(true) {
\n \/\/\u4e00\u3001\u4ece\u63a7\u5236\u53f0\u8bfb\u53d6\u7528\u6237\u8f93\u5165\u7684\u5185\u5bb9
\n System.out.print("> ");
\n String request = scanner.next();<\/p>\n

\/\/\u4e8c\u3001\u6784\u9020\u6210 UDP \u8bf7\u6c42，\u5e76\u53d1\u9001，\u4e0d\u5149\u8981\u586b\u5185\u5bb9, \u8fd8\u8981\u586b\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3.
\n DatagramPacket reqPacket = new DatagramPacket(
\n request.getBytes(),
\n request.getBytes().length,
\n \/\/\u8981\u53d1\u9001\u7684\u670d\u52a1\u5668\u7684 ip \u548c \u7aef\u53e3
\n InetAddress.getByName(serverIp),
\n serverPort);
\n socket.send(reqPacket);<\/p>\n

\/\/\u4e09\u3001\u8bfb\u53d6\u670d\u52a1\u5668\u7684\u54cd\u5e94\u3002
\n DatagramPacket respPacket = new DatagramPacket(new byte[4096],4096);
\n socket.receive(respPacket);
\n String response = new String(respPacket.getData(), 0, respPacket.getLength());<\/p>\n

\/\/\u56db\u3001\u628a\u54cd\u5e94\u663e\u793a\u5230\u63a7\u5236\u53f0\u3002
\n System.out.println(response);
\n }
\n }<\/p>\n

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

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6240\u4ee5\u53ef\u4ee5\u770b\u5230\u5ba2\u6237\u7aef\u57fa\u672c\u6d41\u7a0b\u662f：\u5148\u6784\u9020\u4e00\u4e2a DatagramSocker \u5bf9\u8c61\u5b9e\u4f8b\u7528\u4e8e\u53d1\u9001\u6570\u636e\u5305\u3002DatagramSocker \u53d1\u9001\u8bf7\u6c42\u4e4b\u524d\u5148\u6784\u9020\u4e00\u4e2a\u7528\u4e8e\u53d1\u9001\u6570\u636e\u62a5\u7684 DatagramPacket \u5bf9\u8c61，\u7ecf\u8fc7\u670d\u52a1\u5668\u5904\u7406\u540e，\u5ba2\u6237\u7aef\u8bfb\u53d6\u8fd4\u56de\u7ed3\u679c\u4e4b\u524d，\u518d\u65b0\u6784\u9020\u4e00\u4e2a\u7528\u4e8e\u8bfb\u53d6\u6570\u636e\u62a5\u7684 DatagramPacket \u5bf9\u8c61，\u5904\u7406\u7ed3\u679c\u540e\u6253\u5370\u5728\u63a7\u5236\u53f0\u4e0a\u3002<\/span><\/p>\n<\/p>\n

\u7ee7\u627f EchoServer \u670d\u52a1\u5668\u7684\u5e26\u6709\u67e5\u8be2\u5355\u8bcd\u529f\u80fd\u7684\u670d\u52a1\u5668：<\/h4>\n

\/\/\u7ee7\u627f EchoServer \u7c7b
\npublic class DictServer extends EchoServer{<\/p>\n

\/\/\u4f7f\u7528\u54c8\u5e0c\u8868，\u67e5\u8be2\u66f4\u5feb
\n private Map<String,String> map = new HashMap<>();<\/p>\n

public DictServer(int port) throws SocketException {
\n super(port);<\/p>\n

map.put("cat", "\u5c0f\u732b");
\n map.put("dog", "\u5c0f\u72d7");
\n map.put("pig", "\u5c0f\u732a");
\n map.put("bird", "\u5c0f\u9e1f");
\n map.put("sheep", "\u5c0f\u7f8a");
\n map.put("cow", "\u5c0f\u725b");
\n map.put("chicken", "\u5c0f\u9e21");
\n map.put("rabbit", "\u5c0f\u5154\u5b50");
\n map.put("fish", "\u5c0f\u9c7c");
\n map.put("wolf", "\u72fc");
\n map.put("monkey", "\u7334\u5b50");
\n map.put("tiger", "\u8001\u864e");
\n map.put("lion", "\u72ee\u5b50");
\n \/\/……<\/p>\n

}<\/p>\n

\/\/\u91cd\u5199\u7236\u7c7b\u7684 process \u65b9\u6cd5
\n @Override
\n public String process(String request) {
\n return map.getOrDefault(request,"\u6ca1\u6709\u67e5\u5230\u8be5\u5355\u8bcd！");
\n }<\/p>\n

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

\u00a0 \u00a0 \u00a0 \u00a0 \u901a\u8fc7\u7ee7\u627f\u00a0EchoServer \u8fd9\u4e2a\u7c7b\u540e，\u8c03\u7528 process \u65b9\u6cd5\u4f1a\u4f7f\u7528\u5b50\u7c7b\u4e5f\u5c31\u662f\u00a0\u00a0DictServer \u8fd9\u4e2a\u7c7b\u91cd\u5199\u7684 process \u65b9\u6cd5\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8981\u6ce8\u610f\u7684\u662f，\u00a0DictServer\u00a0\u7ee7\u627f\u00a0EchoServer \u8fd9\u4e2a\u7c7b ，\u91cd\u5199 process \u65b9\u6cd5\u4e4b\u524d，\u8981\u628aEchoServer \u8fd9\u4e2a\u7c7bprocess \u8fd9\u4e2a\u65b9\u6cd5\u6539\u6210 \u516c\u6709\u7684\u65b9\u6cd5（public）\u3002<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n

\u4e09\u3001TCP \u7f51\u7edc\u7f16\u7a0b\u5957\u63a5\u5b57；\u57fa\u4e8e TCP \u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668：<\/h2>\n

1.TCP \u6570\u636e\u62a5\u5957\u63a5\u5b57\u6838\u5fc3\u7c7b<\/h3>\n

ServerSocket：<\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ServerSocke \u7c7b\u662f\u4e13\u95e8\u7ed9\u670d\u52a1\u5668\u7528\u7684\u3002<\/span>\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u76d1\u542c\u6307\u5b9a\u7aef\u53e3，\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\u4e00\u65e6\u6709\u5ba2\u6237\u7aef\u8fde\u63a5，\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u00a0Socket\u00a0\u5bf9\u8c61\u6765\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n<\/p>\n

ServerSocket \u6784\u9020\u65b9\u6cd5：<\/p>\n

ServerSocket serverscoket = new ServerSocket(int port); <\/p>\n

port \u662f\u670d\u52a1\u5668\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n<\/p>\n

ServerSocket \u5b9e\u4f8b\u65b9\u6cd5：<\/p>\n\n\n\n\n
accept()\u00a0<\/td>\n\u76d1\u542c\u5e76\u63a5\u53d7\u5230\u6b64\u5957\u63a5\u5b57\u7684\u8fde\u63a5\u3002\u8be5\u65b9\u6cd5\u4f1a\u963b\u585e，\u76f4\u5230\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u8fdb\u6765，\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u00a0Socket\u00a0\u5bf9\u8c61，\u7528\u4e8e\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1\u3002<\/td>\n<\/tr>\n
close()<\/td>\n\u5173\u95ed\u6b64\u670d\u52a1\u5668\u5957\u63a5\u5b57\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/p>\n<\/p>\n

Socket：<\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Socket\u00a0\u7c7b\u7528\u4e8e\u8868\u793a\u5ba2\u6237\u7aef\u5957\u63a5\u5b57，\u4e5f\u5c31\u662f\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u540e\u5ba2\u6237\u7aef\u7528\u6765\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u7684\u5bf9\u8c61\u3002\u5b83\u53ef\u4ee5\u5b9e\u73b0\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u6570\u636e\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n<\/p>\n

\u00a0\u00a0Socket\u00a0\u6784\u9020\u65b9\u6cd5：<\/p>\n

Socket socket = new Socket(String IP,int port); <\/p>\n

\u521b\u5efa\u4e00\u4e2a\u6d41\u5957\u63a5\u5b57\u5e76\u5c06\u5176\u8fde\u63a5\u5230\u6307\u5b9a\u4e3b\u673a\u4e0a\u7684\u6307\u5b9a\u7aef\u53e3\u53f7\u3002IP \u662f\u670d\u52a1\u5668\u7684 IP \u5730\u5740\u6216\u4e3b\u673a\u540d，port \u662f\u670d\u52a1\u5668\u76d1\u542c\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n<\/p>\n

Socket \u5b9e\u4f8b\u65b9\u6cd5：<\/p>\n\n\n\n\n
getInputStream( )<\/td>\n\u8fd4\u56de\u6b64\u5957\u63a5\u5b57\u7684\u8f93\u5165\u6d41，\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u8bfb\u53d6\u6570\u636e，\u8fd4\u56de\u6d41\u5bf9\u8c61\u662fInputStream<\/td>\n<\/tr>\n
getOutputStream( )<\/td>\n\u8fd4\u56de\u6b64\u5957\u63a5\u5b57\u7684\u8f93\u51fa\u6d41，\u7528\u4e8e\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e，\u8fd4\u56de\u6d41\u5bf9\u8c61\u662fOutputStream<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/p>\n<\/p>\n<\/p>\n

2.\u57fa\u4e8e TCP\u00a0\u534f\u8bae\u7684\u56de\u663e\u670d\u52a1\u5668<\/h3>\n

\u670d\u52a1\u5668：<\/h4>\n

public class EchoServer {
\n private ServerSocket serverSocket;<\/p>\n

public EchoServer(int port) throws IOException {
\n \/\/\u670d\u52a1\u5668\u542f\u52a8，\u5c31\u4f1a\u7ed1\u5b9a\u5230 port \u7aef\u53e3\u4e0a\u9762\u3002
\n serverSocket = new ServerSocket(port);
\n }<\/p>\n

public void start() throws IOException {
\n System.out.println("\u670d\u52a1\u5668\u4e0a\u7ebf！");<\/p>\n

while(true) {
\n \/\/\u63a5\u6536\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42
\n Socket socket = serverSocket.accept();<\/p>\n

\/\/\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406\u4e00\u4e2a\u8fde\u63a5，\u8fd9\u6837\u670d\u52a1\u5668\u53ef\u4ee5\u88ab\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u3002
\n Thread t = new Thread(() -> {
\n this.processCoonection(socket);
\n });<\/p>\n

t.start();
\n }
\n }<\/p>\n

\/\/\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef\/\u4e00\u4e2a\u8fde\u63a5\u7684\u903b\u8f91.
\n private void processCoonection(Socket socket) {
\n System.out.printf("[%s:%d] \u5ba2\u6237\u7aef\u4e0a\u7ebf！\\\\n",socket.getInetAddress().toString(),socket.getPort());<\/p>\n

\/\/\u5b9e\u73b0\u901a\u4fe1\u7684\u4ee3\u7801\u903b\u8f91
\n \/\/\u83b7\u53d6\u4e0e\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u8f93\u5165\u6d41\u548c\u8f93\u51fa\u6d41
\n try(InputStream inputStream = socket.getInputStream();
\n OutputStream outputStream = socket.getOutputStream()) {<\/p>\n

\/\/\u521b\u5efa\u4e00\u4e2a Scanner \u5bf9\u8c61，\u7528\u5b83\u4ece\u8f93\u5165\u6d41 inputStream \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u8bf7\u6c42\u6570\u636e
\n Scanner scanner = new Scanner(inputStream);
\n \/\/\u521b\u5efa\u4e00\u4e2a PrintWriter \u5bf9\u8c61，\u5229\u7528\u5b83\u628a\u54cd\u5e94\u6570\u636e\u5199\u5165\u8f93\u51fa\u6d41 outputStream
\n PrintWriter writer = new PrintWriter(outputStream);<\/p>\n

while(true) {
\n \/\/\u4e00\u3001\u8bfb\u53d6\u8bf7\u6c42\u5e76\u89e3\u6790\u3002
\n if(!scanner.hasNext()) {
\n \/\/ \u9488\u5bf9\u5ba2\u6237\u7aef\u4e0b\u7ebf\u903b\u8f91\u7684\u5904\u7406. \u5982\u679c\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u4e86 (\u6bd4\u5982\u5ba2\u6237\u7aef\u7ed3\u675f\u4e86)
\n \/\/ \u6b64\u65f6 hasNext \u5c31\u4f1a\u8fd4\u56de false
\n System.out.printf("[%s:%d] \u5ba2\u6237\u7aef\u4e0b\u7ebf！\\\\n", socket.getInetAddress().toString(), socket.getPort());
\n break;
\n }
\n String request = scanner.next();<\/p>\n

\/\/\u4e8c\u3001\u6839\u636e\u8bf7\u6c42\u8ba1\u7b97\u54cd\u5e94\u3002
\n String response = process(request);<\/p>\n

\/\/\u4e09\u3001\u628a\u54cd\u5e94\u5199\u56de\u5ba2\u6237\u7aef\u3002
\n writer.println(response);
\n \/\/\u5237\u65b0\u7f13\u51b2\u533a
\n writer.flush();<\/p>\n

System.out.printf("[%s:%d] req: %s; resp: %s\\\\n", socket.getInetAddress().toString(), socket.getPort(), request, response);
\n }
\n } catch(IOException e) {
\n e.printStackTrace();
\n } finally {
\n try {
\n \/\/\u9632\u6b62\u6587\u4ef6\u8d44\u6e90\u6cc4\u9732
\n socket.close();
\n } catch (IOException e) {
\n throw new RuntimeException(e);
\n }
\n }
\n }<\/p>\n

\/\/\u8fd9\u91cc\u7531\u4e8e\u662f\u56de\u663e\u670d\u52a1\u5668，\u76f4\u63a5\u8fd4\u56de\u7ed3\u679c\u3002
\n private String process(String request) {
\n return request;
\n }<\/p>\n

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

\u00a0 \u00a0 \u00a0 \u00a0 \u5728\u4e0a\u9762\u7684\u8fd9\u6bb5\u4ee3\u7801\u00a0this.processCoonection(socket); \u8981\u52a0\u4e0a this<\/span> ，\u56e0\u4e3aprocessCoonection\u65b9\u6cd5\u662fEchoServer \u7684\u4e00\u4e2a\u5b9e\u4f8b\u65b9\u6cd5，\u8fd9\u610f\u5473\u7740\u53ea\u6709 EchoServer \u7c7b\u7684\u5bf9\u8c61\u5b9e\u4f8b\u624d\u80fd\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u800c this\u00a0\u5728\u8fd9\u91cc\u5c31\u8d77\u5230\u4e86\u786e\u5b9a \u201c\u5230\u5e95\u662f\u54ea\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u8981\u8c03\u7528\u00a0processCoonection \u65b9\u6cd5\u201d \u7684\u4f5c\u7528\u3002\u56e0\u4e3a\u6211\u4eec\u662f\u5728\u00a0EchoServer\u00a0\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u65b9\u6cd5 start\u00a0\u91cc\u9762\u521b\u5efa\u7684\u8fd9\u4e2a\u7ebf\u7a0b，\u6240\u4ee5 this\u00a0\u6307\u5411\u7684\u5c31\u662f\u8c03\u7528 start \u65b9\u6cd5\u7684\u90a3\u4e2a\u00a0EchoServer\u00a0\u5bf9\u8c61\u5b9e\u4f8b（\u6bd4\u5982\u524d\u9762\u521b\u5efa\u7684 echoServer\u00a0\u00a0\u5b9e\u4f8b）\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fd8\u6709，\u8fd9\u91cc\u6d89\u53ca\u5230\u4e86\u53d8\u91cf\u6355\u83b7，\u00a0this.processCoonection(socket)；\u91cc\u4f20\u5165\u7684 socket \u3002<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f53\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u6216\u8005\u533f\u540d\u5185\u90e8\u7c7b\u65f6，\u5982\u679c\u5728\u5176\u5185\u90e8\u5f15\u7528\u4e86\u5916\u90e8\u4f5c\u7528\u57df\u7684\u5c40\u90e8\u53d8\u91cf，\u5c31\u4f1a\u53d1\u751f\u53d8\u91cf\u6355\u83b7\u3002\u88ab\u6355\u83b7\u7684\u53d8\u91cf\u5fc5\u987b\u662f final \u6216\u8005\u4e8b\u5b9e final\u00a0（\u5373\u521d\u59cb\u5316\u540e\u503c\u4e0d\u4f1a\u518d\u6539\u53d8）\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6bcf\u6b21\u5faa\u73af\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u00a0socket\u00a0\u5bf9\u8c61\u3002\u5728 Lambda \u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u00a0socket\u00a0\u65f6，\u5b9e\u9645\u4e0a\u6355\u83b7\u4e86\u5f53\u524d\u5faa\u73af\u4e2d\u00a0socket\u00a0\u53d8\u91cf\u7684\u503c\u3002\u6240\u4ee5 Lambda \u8868\u8fbe\u5f0f\u9700\u8981\u6355\u83b7\u5f53\u524d\u00a0socket\u00a0\u53d8\u91cf\u7684\u503c，\u4ee5\u4fbf\u5728\u5176\u6267\u884c\u65f6\u80fd\u591f\u6b63\u786e\u8bbf\u95ee\u5230\u5bf9\u5e94\u7684\u00a0socket\u00a0\u5bf9\u8c61\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this\u00a0\u540c\u6837\u4e5f\u88ab\u6355\u83b7\u4e86\u3002\u5728 Lambda \u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u00a0this.processCoonection(socket);，\u8fd9\u91cc\u7684\u00a0this\u00a0\u6307\u5411\u5f53\u524d\u00a0EchoServer\u00a0\u7c7b\u7684\u5b9e\u4f8b\u3002\u7531\u4e8e Lambda \u8868\u8fbe\u5f0f\u4f1a\u5728\u65b0\u7684\u7ebf\u7a0b\u4e2d\u6267\u884c，\u4e3a\u4e86\u5728\u8be5\u7ebf\u7a0b\u4e2d\u80fd\u591f\u8c03\u7528\u5f53\u524d\u00a0EchoServer\u00a0\u5b9e\u4f8b\u7684\u00a0processCoonection\u00a0\u65b9\u6cd5，this\u00a0\u5f15\u7528\u4e5f\u88ab\u6355\u83b7\u4e86\u3002<\/p>\n<\/p>\n

\u670d\u52a1\u5668\u8fd9\u91cc\u8981\u6ce8\u610f\u4e09\u4e2a\u95ee\u9898：<\/p>\n

1\u3001\u8981\u4f7f\u7528 flush \u65b9\u6cd5\u5237\u65b0\u7f13\u51b2\u533a\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Java \u7684\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c\u91cc，\u7f13\u51b2\u533a\u662f\u7cfb\u7edf\u4e3a\u4e86\u63d0\u5347\u6570\u636e\u8bfb\u5199\u6548\u7387\u800c\u8bbe\u7acb\u7684\u4e00\u5757\u5185\u5b58\u533a\u57df\u3002\u5f53\u7a0b\u5e8f\u5411\u8f93\u51fa\u6d41\u5199\u5165\u6570\u636e\u65f6，\u6570\u636e\u4e0d\u4f1a\u9a6c\u4e0a\u88ab\u53d1\u9001\u5230\u76ee\u6807\u8bbe\u5907（\u5982\u7f51\u7edc\u53e6\u4e00\u7aef\u7684\u670d\u52a1\u5668），\u800c\u662f\u5148\u88ab\u5b58\u5230\u7f13\u51b2\u533a\u91cc\u3002\u7b49\u7f13\u51b2\u533a\u6ee1\u4e86，\u6216\u8005\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u65f6，\u7cfb\u7edf\u624d\u4f1a\u628a\u7f13\u51b2\u533a\u91cc\u7684\u6570\u636e\u4e00\u6b21\u6027\u53d1\u9001\u51fa\u53bb\u3002<\/span>\u540c\u7406，\u5f53\u4ece\u8f93\u5165\u6d41\u8bfb\u53d6\u6570\u636e\u65f6，\u6570\u636e\u4f1a\u5148\u88ab\u8bfb\u5230\u7f13\u51b2\u533a，\u7a0b\u5e8f\u518d\u4ece\u7f13\u51b2\u533a\u8bfb\u53d6\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6240\u4ee5，\u6211\u4eec\u8fd9\u4e2a\u670d\u52a1\u5668\u6570\u636e\u6bd4\u8f83\u5c11，\u6570\u636e\u4f1a\u4e00\u76f4\u505c\u7559\u5728\u7f13\u51b2\u533a\u91cc，\u5982\u679c\u4e0d\u5237\u65b0\u7f13\u51b2\u533a，\u670d\u52a1\u5668\u53ef\u80fd\u65e0\u6cd5\u53ca\u65f6\u6536\u5230\u6570\u636e，\u4ece\u800c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6b63\u5e38\u4ea4\u4e92\u3002<\/p>\n<\/p>\n

2\u3001\u8981\u5173\u95ed Socket \u5bf9\u8c61\u3002<\/p>\n

\u00a0 \u00a0 Socket \u5bf9\u8c61\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u4f1a\u5360\u7528\u7cfb\u7edf\u7684\u7f51\u7edc\u8d44\u6e90\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b49\u3002\u5982\u679c\u4e0d\u5173\u95ed，\u8fd9\u4e9b\u8d44\u6e90\u5c31\u65e0\u6cd5\u88ab\u91ca\u653e，\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6cc4\u6f0f\u3002\u968f\u7740\u7a0b\u5e8f\u8fd0\u884c\u65f6\u95f4\u7684\u589e\u52a0，\u4e0d\u65ad\u7d2f\u79ef\u7684\u8d44\u6e90\u6cc4\u6f0f\u53ef\u80fd\u4f1a\u8017\u5c3d\u7cfb\u7edf\u8d44\u6e90，\u5f71\u54cd\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c，\u751a\u81f3\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002<\/p>\n<\/p>\n<\/p>\n

\u5ba2\u6237\u7aef：<\/h4>\n

public class EchoClient {
\n private Socket socket;<\/p>\n

public EchoClient(String serverIP, int serverPort) throws IOException {
\n \/\/ \u5728 new \u8fd9\u4e2a\u5bf9\u8c61\u7684\u65f6\u5019\u5c31\u6d89\u53ca\u5230 "\u5efa\u7acb\u8fde\u63a5\u64cd\u4f5c"
\n \/\/ \u7531\u4e8e\u8fde\u63a5\u5efa\u7acb\u597d\u4e86\u4e4b\u540e, \u670d\u52a1\u5668\u7684\u4fe1\u606f\u5c31\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u88ab TCP \u534f\u8bae\u8bb0\u5f55\u4e86. \u6211\u4eec\u5728\u5e94\u7528\u7a0b\u5e8f\u5c42\u9762\u4e0a\u5c31\u4e0d\u9700\u8981\u4fdd\u5b58 IP \u548c \u7aef\u53e3.
\n socket = new Socket(serverIP,serverPort);
\n }<\/p>\n

public void start() {
\n System.out.println("\u5ba2\u6237\u7aef\u4e0a\u7ebf！");<\/p>\n

Scanner scanner = new Scanner(System.in);<\/p>\n

\/\/ \/\/\u83b7\u53d6\u4e0e\u670d\u52a1\u5668\u8fde\u63a5\u7684\u8f93\u5165\u6d41\u548c\u8f93\u51fa\u6d41
\n try(InputStream inputStream = socket.getInputStream();
\n OutputStream outputStream = socket.getOutputStream()) {<\/p>\n

\/\/\u521b\u5efa\u4e00\u4e2a Scanner \u5bf9\u8c61，\u7528\u5b83\u4ece\u8f93\u5165\u6d41 inputStream \u8bfb\u53d6\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e
\n Scanner scannerNet = new Scanner(inputStream);
\n \/\/\u521b\u5efa\u4e00\u4e2a PrintWriter \u5bf9\u8c61，\u5229\u7528\u5b83\u628a\u8bf7\u6c42\u6570\u636e\u53d1\u9001\u7ed9\u670d\u52a1\u5668
\n PrintWriter writer = new PrintWriter(outputStream);<\/p>\n

while(true) {
\n \/\/\u4e00\u3001\u4ece\u63a7\u5236\u53f0\u8bfb\u53d6\u7528\u6237\u7684\u8f93\u5165\u3002
\n System.out.print(">");
\n String request = scanner.next();<\/p>\n

\/\/\u4e8c\u3001\u6784\u9020\u8bf7\u6c42\u53d1\u9001\u7ed9\u670d\u52a1\u5668
\n writer.println(request);
\n \/\/\u5237\u65b0\u7f13\u51b2\u533a
\n writer.flush();<\/p>\n

\/\/\u4e09\u3001\u8bfb\u53d6\u670d\u52a1\u5668\u7684\u54cd\u5e94\u3002
\n if(!scannerNet.hasNext()) {
\n System.out.println("\u670d\u52a1\u5668\u65ad\u5f00\u8fde\u63a5！");
\n break;
\n }
\n String response = scannerNet.next();<\/p>\n

\/\/\u56db\u3001\u628a\u54cd\u5e94\u663e\u793a\u5230\u63a7\u5236\u53f0\u4e0a
\n System.out.println(response);
\n }
\n } catch (IOException e) {
\n e.printStackTrace();
\n }
\n }<\/p>\n

public static void main(String[] args) throws IOException {
\n EchoClient echoClient = new EchoClient("127.0.0.1",9090);
\n echoClient.start();
\n }
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

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