{"id":45477,"date":"2024-12-01T17:46:55","date_gmt":"2024-12-01T09:46:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/45477\/"},"modified":"2024-12-01T17:46:55","modified_gmt":"2024-12-01T09:46:55","slug":"%e4%bd%bf%e7%94%a8javascript%e5%92%8credis%e6%9e%84%e5%bb%ba%e5%ae%9e%e6%97%b6%e8%b4%ad%e7%89%a9%e8%bd%a6%ef%bc%9a%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86%e7%94%a8%e6%88%b7%e8%b4%ad%e4%b9%b0%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/45477\/","title":{"rendered":"\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a"},"content":{"rendered":"

<\/b> <\/p>\n

\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6570\u636e\u5e93\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300a\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a<\/p>\n

\u5f15\u8a00\uff1a
\u5728\u4eca\u5929\u7684\u7535\u5b50\u5546\u52a1\u65f6\u4ee3\uff0c\u8d2d\u7269\u8f66\u662f\u7f51\u7ad9\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\u3002\u4e00\u4e2a\u9ad8\u6548\u7684\u8d2d\u7269\u8f66\u7cfb\u7edf\u4e0d\u4ec5\u9700\u8981\u5b9e\u65f6\u66f4\u65b0\uff0c\u8fd8\u9700\u8981\u5904\u7406\u7528\u6237\u7684\u8d2d\u4e70\u884c\u4e3a\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u4e00\u4e2a\u5b9e\u65f6\u8d2d\u7269\u8f66\u7cfb\u7edf\uff0c\u5e76\u8be6\u7ec6\u89e3\u91ca\u5982\u4f55\u5904\u7406\u7528\u6237\u7684\u8d2d\u4e70\u884c\u4e3a\u3002<\/p>\n

\u4e00\u3001\u6784\u5efa\u8d2d\u7269\u8f66\u6570\u636e\u7ed3\u6784
\u5728Redis\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b58\u50a8\u8d2d\u7269\u8f66\u7684\u6570\u636e\u3002\u6bcf\u4e2a\u8d2d\u7269\u8f66\u5bf9\u8c61\u90fd\u53ef\u4ee5\u5b58\u50a8\u7528\u6237ID\u3001\u5546\u54c1ID\u3001\u5546\u54c1\u6570\u91cf\u7b49\u4fe1\u606f\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

const redis = require('redis');\nconst client = redis.createClient();\n\n\/\/ \u6dfb\u52a0\u5546\u54c1\u5230\u8d2d\u7269\u8f66\nfunction addItemToCart(userId, itemId, quantity) {\n  client.hset(`cart:${userId}`, itemId, quantity);\n}\n\n\/\/ \u4ece\u8d2d\u7269\u8f66\u4e2d\u5220\u9664\u6307\u5b9a\u5546\u54c1\nfunction removeItemFromCart(userId, itemId) {\n  client.hdel(`cart:${userId}`, itemId);\n}\n\n\/\/ \u83b7\u53d6\u8d2d\u7269\u8f66\u4e2d\u7684\u6240\u6709\u5546\u54c1\nasync function getCartItems(userId) {\n  return new Promise((resolve, reject) => {\n    client.hgetall(`cart:${userId}`, (err, items) => {\n      if (err) {\n        reject(err);\n      } else {\n        resolve(items);\n      }\n    });\n  });\n}<\/pre>\n
\u4e8c\u3001\u5904\u7406\u8d2d\u4e70\u884c\u4e3a
\u5728\u8d2d\u7269\u8f66\u7cfb\u7edf\u4e2d\uff0c\u5904\u7406\u7528\u6237\u7684\u8d2d\u4e70\u884c\u4e3a\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4f8b\u5982\uff0c\u5f53\u7528\u6237\u70b9\u51fb\u8d2d\u4e70\u6309\u94ae\u65f6\uff0c\u6211\u4eec\u9700\u8981\u4ece\u8d2d\u7269\u8f66\u4e2d\u79fb\u9664\u5df2\u8d2d\u4e70\u7684\u5546\u54c1\uff0c\u5e76\u8fdb\u884c\u76f8\u5e94\u7684\u5e93\u5b58\u66f4\u65b0\u7b49\u64cd\u4f5c\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u5904\u7406\u8d2d\u4e70\u884c\u4e3a\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
\/\/ \u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a\nasync function handlePurchase(userId, itemId, quantity) {\n  const itemsInCart = await getCartItems(userId);\n\n  if (itemsInCart[itemId]) {\n    const cartQuantity = parseInt(itemsInCart[itemId]);\n\n    \/\/ \u68c0\u67e5\u8d2d\u7269\u8f66\u4e2d\u5546\u54c1\u7684\u6570\u91cf\u662f\u5426\u8db3\u591f\n    if (cartQuantity >= quantity) {\n      \/\/ \u4ece\u8d2d\u7269\u8f66\u4e2d\u79fb\u9664\u5df2\u8d2d\u4e70\u7684\u5546\u54c1\n      removeItemFromCart(userId, itemId);\n\n      \/\/ \u66f4\u65b0\u5e93\u5b58\u6570\u91cf\n      updateItemInventory(itemId, quantity);\n\n      \/\/ \u5176\u4ed6\u8d2d\u4e70\u884c\u4e3a\u7684\u5904\u7406\uff0c\u4f8b\u5982\u751f\u6210\u8ba2\u5355\u7b49\n      \/\/ ...\n\n      return true;\n    } else {\n      throw new Error('\u8d2d\u7269\u8f66\u4e2d\u7684\u5546\u54c1\u6570\u91cf\u4e0d\u8db3');\n    }\n  } else {\n    throw new Error('\u8d2d\u7269\u8f66\u4e2d\u4e0d\u5b58\u5728\u8be5\u5546\u54c1');\n  }\n}<\/pre>\n
\u4e09\u3001\u5b9e\u65f6\u66f4\u65b0\u8d2d\u7269\u8f66
\u4e00\u4e2a\u4f18\u8d28\u7684\u8d2d\u7269\u8f66\u7cfb\u7edf\u5e94\u8be5\u80fd\u591f\u5b9e\u65f6\u66f4\u65b0\uff0c\u4ee5\u4fbf\u7528\u6237\u53ef\u4ee5\u968f\u65f6\u67e5\u770b\u4ed6\u4eec\u8d2d\u7269\u8f66\u4e2d\u7684\u6700\u65b0\u72b6\u6001\u3002\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528WebSocket\u6765\u5b9e\u73b0\u5b9e\u65f6\u66f4\u65b0\u8d2d\u7269\u8f66\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
const WebSocket = require('ws');\nconst wss = new WebSocket.Server({ port: 8080 });\n\nwss.on('connection', (ws) => {\n  ws.on('message', (message) => {\n    const { userId } = JSON.parse(message);\n    \n    \/\/ \u5ba2\u6237\u7aef\u8fde\u63a5\u65f6\u53d1\u9001\u8d2d\u7269\u8f66\u6570\u636e\n    getCartItems(userId)\n      .then((items) => {\n        ws.send(JSON.stringify(items));\n      })\n      .catch((err) => {\n        console.error(err);\n      });\n  });\n});<\/pre>\n
\u5728\u5ba2\u6237\u7aef\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u65f6\u5c55\u793a\u8d2d\u7269\u8f66\u6570\u636e\uff1a<\/p>\n
const ws = new WebSocket('ws:\/\/localhost:8080');\n\nws.onopen = (event) => {\n  ws.send(JSON.stringify({ userId: 123 }));\n};\n\nws.onmessage = (event) => {\n  const items = JSON.parse(event.data);\n\n  \/\/ \u5b9e\u65f6\u5c55\u793a\u8d2d\u7269\u8f66\u6570\u636e\n  \/\/ ...\n};<\/pre>\n
\u7ed3\u8bba\uff1a
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\u4eca\u5929\u5173\u4e8e\u300a\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728golang\u5b66\u4e60\u7f51\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n
\n
\n <\/dt>\n
\n   MySQL\u4e2d\u5982\u4f55\u8fdb\u884c\u6570\u636e\u7684\u5220\u9664\u548c\u6e05\u7406\u64cd\u4f5c\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u4fee\u590d\u65e0\u6cd5\u8fde\u63a5\u5230iPhone\u4e0a\u7684App Store\u9519\u8bef\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a \u6536\u85cf \u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6570\u636e\u5e93\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300a\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01 \u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u5b9e\u65f6\u8d2d\u7269\u8f66\uff1a\u5982\u4f55\u5904\u7406\u7528\u6237\u8d2d\u4e70\u884c\u4e3a \u5f15\u8a00\uff1a\u5728\u4eca\u5929\u7684\u7535\u5b50\u5546\u52a1\u65f6\u4ee3\uff0c\u8d2d\u7269\u8f66\u662f\u7f51\u7ad9\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\u3002\u4e00\u4e2a\u9ad8\u6548\u7684\u8d2d\u7269\u8f66\u7cfb\u7edf\u4e0d\u4ec5\u9700\u8981\u5b9e\u65f6\u66f4\u65b0\uff0c\u8fd8\u9700\u8981\u5904\u7406\u7528\u6237\u7684\u8d2d\u4e70\u884c\u4e3a\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528JavaScript\u548cRedis\u6784\u5efa\u4e00\u4e2a\u5b9e\u65f6\u8d2d\u7269\u8f66\u7cfb\u7edf\uff0c\u5e76\u8be6\u7ec6\u89e3\u91ca\u5982\u4f55\u5904\u7406\u7528\u6237\u7684\u8d2d\u4e70\u884c\u4e3a\u3002 \u4e00\u3001\u6784\u5efa\u8d2d\u7269\u8f66\u6570\u636e\u7ed3\u6784\u5728Redis\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u54c8\u5e0c\u8868\u6765\u5b58\u50a8\u8d2d\u7269\u8f66\u7684\u6570\u636e\u3002\u6bcf\u4e2a\u8d2d\u7269\u8f66\u5bf9\u8c61\u90fd\u53ef\u4ee5\u5b58\u50a8\u7528\u6237ID\u3001\u5546\u54c1ID\u3001\u5546\u54c1\u6570\u91cf\u7b49\u4fe1\u606f\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a const redis = require(‘redis’); const client = redis.createClient(); \/\/ \u6dfb\u52a0\u5546\u54c1\u5230\u8d2d\u7269\u8f66 function addItemToCart(userId, itemId, quantity) { client.hset(`cart:${userId}`, itemId, quantity); } \/\/ \u4ece\u8d2d\u7269\u8f66\u4e2d\u5220\u9664\u6307\u5b9a\u5546\u54c1 function removeItemFromCart(userId, itemId) { client.hdel(`cart:${userId}`, itemId); } \/\/ \u83b7\u53d6\u8d2d\u7269\u8f66\u4e2d\u7684\u6240\u6709\u5546\u54c1 async function getCartItems(userId) { return new Promise((resolve, reject) => { client.hgetall(`cart:${userId}`, (err, items) => { if (err) { reject(err); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-45477","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/45477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=45477"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/45477\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=45477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=45477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=45477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}