{"id":112883,"date":"2026-10-05T03:41:47","date_gmt":"2026-10-04T19:41:47","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/112883.html"},"modified":"2026-10-05T03:41:47","modified_gmt":"2026-10-04T19:41:47","slug":"cookie%e3%80%81localstorage%e3%80%81sessionstorage%e7%bb%88%e6%9e%81%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/112883.html","title":{"rendered":"Cookie\u3001LocalStorage\u3001SessionStorage\u7ec8\u6781\u5bf9\u6bd4"},"content":{"rendered":"

Cookie\u3001LocalStorage\u3001SessionStorage \u5b8c\u6574\u5bf9\u6bd4：\u524d\u7aef\u6570\u636e\u5b58\u50a8\u7684\u4e09\u5927\u6838\u5fc3\u9009\u62e9<\/h4>\n

\u5728\u73b0\u4ee3 Web \u5e94\u7528\u5f00\u53d1\u4e2d，\u5ba2\u6237\u7aef\u6570\u636e\u5b58\u50a8\u662f\u6784\u5efa\u52a8\u6001\u3001\u4e2a\u6027\u5316\u4f53\u9a8c\u7684\u57fa\u7840\u3002\u9762\u5bf9\u591a\u79cd\u5b58\u50a8\u673a\u5236，\u5f00\u53d1\u8005\u5e38\u9677\u5165\u9009\u62e9\u56f0\u5883：\u7a76\u7adf\u8be5\u7528 Cookie\u3001LocalStorage \u8fd8\u662f SessionStorage？\u4e09\u8005\u867d\u90fd\u7528\u4e8e\u4fdd\u5b58\u5ba2\u6237\u7aef\u6570\u636e，\u4f46\u5728\u529f\u80fd\u3001\u5b89\u5168\u3001\u6027\u80fd\u548c\u4f7f\u7528\u573a\u666f\u4e0a\u5b58\u5728\u663e\u8457\u5dee\u5f02\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u7279\u6027\u3001\u9002\u7528\u573a\u666f\u53ca\u4ee3\u7801\u5b9e\u8df5\u51fa\u53d1，\u5168\u9762\u89e3\u6790\u8fd9\u4e09\u79cd\u5b58\u50a8\u65b9\u5f0f，\u5e2e\u52a9\u4f60\u505a\u51fa\u5408\u7406\u51b3\u7b56\u3002<\/p>\n

\n

\u4e00\u3001\u6838\u5fc3\u6982\u5ff5\u4e0e\u57fa\u672c\u7279\u6027\u5bf9\u6bd4<\/h5>\n\n\u7279\u6027CookieLocalStorageSessionStorage<\/tr>\n\n\n\n\n\n\n\n
\u5b58\u50a8\u5bb9\u91cf<\/td>\n\u7ea6 4KB<\/td>\n5MB~10MB<\/td>\n5MB~10MB<\/td>\n<\/tr>\n
\u751f\u547d\u5468\u671f<\/td>\n\u53ef\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4，\u53ef\u6301\u4e45\u5316<\/td>\n\u6c38\u4e45\u5b58\u50a8，\u9664\u975e\u624b\u52a8\u6e05\u9664<\/td>\n\u9875\u9762\u4f1a\u8bdd\u671f\u95f4\u6709\u6548，\u5173\u95ed\u5373\u6e05\u7a7a<\/td>\n<\/tr>\n
\u662f\u5426\u968f\u8bf7\u6c42\u53d1\u9001<\/td>\n\u662f（\u81ea\u52a8\u643a\u5e26）<\/td>\n\u5426<\/td>\n\u5426<\/td>\n<\/tr>\n
\u8de8\u57df\u652f\u6301<\/td>\n\u652f\u6301（\u9700\u8bbe\u7f6e domain）<\/td>\n\u5426<\/td>\n\u5426<\/td>\n<\/tr>\n
\u5b89\u5168\u6027<\/td>\n\u8f83\u4f4e（\u6613\u88ab\u7be1\u6539，\u53ef\u80fd\u6cc4\u9732）<\/td>\n\u4e2d\u7b49（\u4ec5\u9650\u540c\u6e90）<\/td>\n\u4e2d\u7b49（\u4ec5\u9650\u5f53\u524d\u4f1a\u8bdd）<\/td>\n<\/tr>\n
\u662f\u5426\u652f\u6301\u8de8\u9875\u9762\u5171\u4eab<\/td>\n\u662f（\u540c\u57df\u540d\u4e0b）<\/td>\n\u662f<\/td>\n\u5426（\u540c\u4e00\u6807\u7b7e\u9875\u5185）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
\u4e8c\u3001\u6df1\u5165\u5256\u6790：\u6bcf\u79cd\u5b58\u50a8\u673a\u5236\u7684\u5b9e\u73b0\u539f\u7406<\/h5>\n

1. Cookie：HTTP \u534f\u8bae\u7684\u201c\u8001\u5c06\u201d<\/p>\n

Cookie \u662f\u6700\u65e9\u7528\u4e8e\u5ba2\u6237\u7aef\u72b6\u6001\u7ba1\u7406\u7684\u6280\u672f\u4e4b\u4e00，\u7531\u670d\u52a1\u5668\u901a\u8fc7 Set-Cookie \u54cd\u5e94\u5934\u8bbe\u7f6e，\u5e76\u5728\u540e\u7eed\u8bf7\u6c42\u4e2d\u81ea\u52a8\u9644\u52a0\u5230 Cookie \u8bf7\u6c42\u5934\u4e2d\u3002\u5b83\u672c\u8d28\u4e0a\u662f\u6d4f\u89c8\u5668\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u4f20\u9012\u72b6\u6001\u4fe1\u606f\u7684\u6865\u6881\u3002<\/p>\n

\/\/ \u8bbe\u7f6e\u4e00\u4e2a\u5e26\u8fc7\u671f\u65f6\u95f4\u7684 Cookie
\ndocument.cookie = "username=John; expires=Fri, 31 Dec 2025 23:59:59 GMT; path=\/; secure; sameSite=Lax";<\/p>\n

\/\/ \u8bfb\u53d6\u6240\u6709 Cookie
\nconsole.log(document.cookie); \/\/ "username=John"<\/p>\n

\u26a0\ufe0f \u6ce8\u610f：document.cookie \u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32，\u9700\u81ea\u884c\u89e3\u6790\u3002\u82e5\u8981\u83b7\u53d6\u7279\u5b9a\u503c，\u5efa\u8bae\u5c01\u88c5\u5de5\u5177\u51fd\u6570：<\/p>\n

function getCookie(name) {
\n const value = `; ${document.cookie}`;
\n const parts = value.split(`; ${name}=`);
\n if (parts.length === 2) return parts.pop().split(';').shift();
\n return null;
\n}<\/p>\n

console.log(getCookie("username")); \/\/ "John"<\/p>\n

2. LocalStorage：\u6301\u4e45\u5316\u7684\u672c\u5730\u5b58\u50a8<\/p>\n

LocalStorage \u63d0\u4f9b\u4e86\u57fa\u4e8e\u952e\u503c\u5bf9\u7684\u6301\u4e45\u5316\u5b58\u50a8\u80fd\u529b，\u6570\u636e\u4e0d\u4f1a\u968f\u9875\u9762\u5237\u65b0\u6216\u5173\u95ed\u800c\u4e22\u5931，\u9002\u7528\u4e8e\u9700\u8981\u957f\u671f\u4fdd\u5b58\u7528\u6237\u504f\u597d\u3001\u7f13\u5b58\u914d\u7f6e\u7b49\u573a\u666f\u3002<\/p>\n

\/\/ \u5199\u5165\u6570\u636e
\nlocalStorage.setItem("theme", "dark");
\nlocalStorage.setItem("userPrefs", JSON.stringify({ fontSize: 16, language: "zh-CN" }));<\/p>\n

\/\/ \u8bfb\u53d6\u6570\u636e
\nconst theme = localStorage.getItem("theme");
\nconst prefs = JSON.parse(localStorage.getItem("userPrefs"));<\/p>\n

console.log(theme); \/\/ "dark"
\nconsole.log(prefs.fontSize); \/\/ 16<\/p>\n

3. SessionStorage：\u4f1a\u8bdd\u7ea7\u4e34\u65f6\u5b58\u50a8<\/p>\n

\u4e0e LocalStorage \u7c7b\u4f3c，\u4f46\u6570\u636e\u4ec5\u5728\u5f53\u524d\u6d4f\u89c8\u5668\u4f1a\u8bdd\u4e2d\u6709\u6548\u3002\u5173\u95ed\u6807\u7b7e\u9875\u540e，\u6240\u6709\u6570\u636e\u5c06\u88ab\u6e05\u9664\u3002\u9002\u5408\u7528\u4e8e\u8868\u5355\u4e2d\u95f4\u72b6\u6001\u3001\u4e34\u65f6\u7f13\u5b58\u7b49\u3002<\/p>\n

\/\/ \u4fdd\u5b58\u8868\u5355\u8349\u7a3f
\nsessionStorage.setItem("draft", "\u8fd9\u662f\u672a\u63d0\u4ea4\u7684\u8868\u5355\u5185\u5bb9");<\/p>\n

\/\/ \u9875\u9762\u5237\u65b0\u540e\u4ecd\u53ef\u6062\u590d
\nwindow.addEventListener("load", () => {
\n const draft = sessionStorage.getItem("draft");
\n if (draft) {
\n document.getElementById("content").value = draft;
\n }
\n});<\/p>\n

\n
\u4e09\u3001\u5b9e\u9645\u5e94\u7528\u573a\u666f\u5bf9\u6bd4\u5206\u6790<\/h5>\n

\u2705 \u63a8\u8350\u4f7f\u7528 Cookie \u7684\u573a\u666f：<\/p>\n

    \n
  • \u7528\u6237\u767b\u5f55\u72b6\u6001\u7ef4\u6301（\u5982 JWT Token）<\/li>\n
  • A\/B \u6d4b\u8bd5\u4e2d\u7684\u7528\u6237\u5206\u7ec4\u6807\u8bb0<\/li>\n
  • \u9700\u8981\u968f\u6bcf\u6b21\u8bf7\u6c42\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u6570\u636e<\/li>\n<\/ul>\n

    \/\/ \u767b\u5f55\u540e\u8bbe\u7f6e token
    \ndocument.cookie = `token=${jwtToken}; path=\/; max-age=3600; secure; httpOnly`;<\/p>\n

    \/\/ \u540e\u7aef\u53ef\u901a\u8fc7 `req.cookies.token` \u83b7\u53d6<\/p>\n

    🔐 httpOnly \u6807\u5fd7\u53ef\u9632\u6b62 XSS \u653b\u51fb\u7a83\u53d6\u4ee4\u724c，\u662f\u5b89\u5168\u5173\u952e\u3002<\/p>\n

    \u2705 \u63a8\u8350\u4f7f\u7528 LocalStorage \u7684\u573a\u666f：<\/p>\n

      \n
    • \u4e3b\u9898\u5207\u6362（\u6df1\u8272\/\u6d45\u8272\u6a21\u5f0f）<\/li>\n
    • \u7528\u6237\u81ea\u5b9a\u4e49\u754c\u9762\u5e03\u5c40<\/li>\n
    • \u7f13\u5b58\u5927\u91cf\u9759\u6001\u8d44\u6e90（\u5982\u5b57\u5178\u3001\u914d\u7f6e\u6587\u4ef6）<\/li>\n<\/ul>\n

      \/\/ \u81ea\u52a8\u5e94\u7528\u4e3b\u9898
      \nconst savedTheme = localStorage.getItem("theme") || "light";
      \ndocument.body.className = savedTheme;<\/p>\n

      \/\/ \u76d1\u542c\u53d8\u5316\u5e76\u66f4\u65b0
      \nwindow.addEventListener("storage", (e) => {
      \n if (e.key === "theme") {
      \n document.body.className = e.newValue;
      \n }
      \n});<\/p>\n

      \u2705 \u63a8\u8350\u4f7f\u7528 SessionStorage \u7684\u573a\u666f：<\/p>\n

        \n
      • \u591a\u6b65\u9aa4\u8868\u5355\u586b\u5199\u8fc7\u7a0b\u4e2d\u7684\u4e34\u65f6\u6570\u636e<\/li>\n
      • \u4e34\u65f6\u5f39\u7a97\u63d0\u793a\u72b6\u6001（\u5982\u201c\u5df2\u6210\u529f\u63d0\u4ea4\u201d）<\/li>\n
      • \u672a\u5b8c\u6210\u7684\u8d2d\u7269\u8f66\u6682\u5b58<\/li>\n<\/ul>\n

        \/\/ \u8868\u5355\u9632\u91cd\u590d\u63d0\u4ea4 + \u6062\u590d
        \nconst form = document.getElementById("checkout-form");
        \nform.addEventListener("submit", function (e) {
        \n sessionStorage.setItem("formData", JSON.stringify(new FormData(form)));
        \n});<\/p>\n

        \/\/ \u9875\u9762\u5237\u65b0\u65f6\u6062\u590d
        \nwindow.addEventListener("load", () => {
        \n const savedData = sessionStorage.getItem("formData");
        \n if (savedData) {
        \n const data = JSON.parse(savedData);
        \n for (let [key, value] of data.entries()) {
        \n document.querySelector(`[name="${key}"]`).value = value;
        \n }
        \n }
        \n});<\/p>\n

        \n
        \u56db\u3001\u5b89\u5168\u6027\u4e0e\u6700\u4f73\u5b9e\u8df5\u5efa\u8bae<\/h5>\n
          \n
        • \u907f\u514d\u5728 Cookie \u4e2d\u5b58\u50a8\u654f\u611f\u4fe1\u606f，\u9664\u975e\u542f\u7528 HttpOnly \u4e14\u914d\u5408 Secure\u3002<\/li>\n
        • \u4e0d\u8981\u5c06\u5bc6\u7801\u3001\u5bc6\u94a5\u7b49\u786c\u7f16\u7801\u5728\u524d\u7aef，\u5373\u4f7f\u4f7f\u7528 LocalStorage \u4e5f\u5e94\u52a0\u5bc6\u5904\u7406\u3002<\/li>\n
        • \u5b9a\u671f\u6e05\u7406\u65e0\u7528\u6570\u636e，\u9632\u6b62\u5b58\u50a8\u7a7a\u95f4\u6ea2\u51fa\u3002<\/li>\n
        • \u8de8\u57df\u95ee\u9898：\u4e09\u8005\u5747\u9075\u5faa\u540c\u6e90\u7b56\u7565，\u4e0d\u53ef\u8de8\u57df\u8bbf\u95ee\u3002<\/li>\n
        • \u517c\u5bb9\u6027：\u6240\u6709\u73b0\u4ee3\u6d4f\u89c8\u5668\u5747\u652f\u6301\u4e0a\u8ff0\u4e09\u79cd\u673a\u5236，\u4f46 IE8+ \u624d\u652f\u6301 LocalStorage\u3002<\/li>\n<\/ul>\n
          \n
          \u4e94\u3001\u6027\u80fd\u4e0e\u5185\u5b58\u8003\u91cf<\/h5>\n\n\u5b58\u50a8\u65b9\u5f0f\u6027\u80fd\u8868\u73b0\u5185\u5b58\u5360\u7528\u9002\u7528\u89c4\u6a21<\/tr>\n\n\n\n\n
          Cookie<\/td>\n\u4f4e（\u6bcf\u6b21\u8bf7\u6c42\u4f20\u8f93）<\/td>\n\u6781\u5c0f<\/td>\n\u5c0f\u91cf\u5143\u6570\u636e<\/td>\n<\/tr>\n
          LocalStorage<\/td>\n\u9ad8（\u5f02\u6b65\u64cd\u4f5c）<\/td>\n\u4e2d\u7b49<\/td>\n\u4e2d\u5927\u89c4\u6a21\u6570\u636e<\/td>\n<\/tr>\n
          SessionStorage<\/td>\n\u9ad8（\u540c\u4f1a\u8bdd\u5185）<\/td>\n\u4e2d\u7b49<\/td>\n\u4e34\u65f6\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          💡 \u5efa\u8bae：\u5bf9\u4e8e\u9891\u7e41\u8bfb\u5199\u7684\u573a\u666f，\u4f18\u5148\u4f7f\u7528 LocalStorage；\u82e5\u6d89\u53ca\u7f51\u7edc\u8bf7\u6c42，\u5e94\u5c3d\u91cf\u51cf\u5c11 Cookie \u5927\u5c0f\u3002<\/p>\n

          \n
          \u516d\u3001\u603b\u7ed3：\u5982\u4f55\u9009\u62e9？<\/h5>\n\n\u573a\u666f\u9700\u6c42\u63a8\u8350\u65b9\u6848<\/tr>\n\n\n\n\n\n\n
          \u9700\u8981\u670d\u52a1\u5668\u8bfb\u53d6<\/td>\n\u2705 Cookie<\/td>\n<\/tr>\n
          \u957f\u671f\u4fdd\u5b58\u7528\u6237\u504f\u597d<\/td>\n\u2705 LocalStorage<\/td>\n<\/tr>\n
          \u4ec5\u5f53\u524d\u4f1a\u8bdd\u6709\u6548<\/td>\n\u2705 SessionStorage<\/td>\n<\/tr>\n
          \u6570\u636e\u91cf\u5927\u4e14\u4e0d\u9700\u4e0a\u4f20<\/td>\n\u2705 LocalStorage<\/td>\n<\/tr>\n
          \u5fc5\u987b\u968f\u8bf7\u6c42\u53d1\u9001<\/td>\n\u2705 Cookie<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          \n
          \u4e03\u3001\u8fdb\u9636\u6280\u5de7：\u5c01\u88c5\u901a\u7528\u5b58\u50a8\u5de5\u5177<\/h5>\n

          \u4e3a\u7edf\u4e00\u7ba1\u7406，\u53ef\u5c01\u88c5\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u5b58\u50a8\u7c7b：<\/p>\n

          class StorageManager {
          \n constructor(type = 'local') {
          \n this.storage = type === 'session' ? sessionStorage : localStorage;
          \n }<\/p>\n

          set(key, value) {
          \n this.storage.setItem(key, JSON.stringify(value));
          \n }<\/p>\n

          get(key) {
          \n const item = this.storage.getItem(key);
          \n return item ? JSON.parse(item) : null;
          \n }<\/p>\n

          remove(key) {
          \n this.storage.removeItem(key);
          \n }<\/p>\n

          clear() {
          \n this.storage.clear();
          \n }
          \n}<\/p>\n

          \/\/ \u4f7f\u7528\u793a\u4f8b
          \nconst userStore = new StorageManager('local');
          \nuserStore.set('userInfo', { name: 'Alice', age: 25 });
          \nconsole.log(userStore.get('userInfo')); \/\/ { name: 'Alice', age: 25 }<\/p>\n

          \n

          \u7ed3\u8bed<\/h4>\n

          \u7406\u89e3 Cookie\u3001LocalStorage \u4e0e SessionStorage \u7684\u672c\u8d28\u5dee\u5f02，\u662f\u6784\u5efa\u5065\u58ee\u524d\u7aef\u67b6\u6784\u7684\u5173\u952e\u4e00\u6b65\u3002\u5b83\u4eec\u5e76\u975e\u4e92\u65a5，\u800c\u662f\u4e92\u8865\u3002\u5408\u7406\u642d\u914d\u4f7f\u7528，\u624d\u80fd\u5728\u6027\u80fd\u3001\u5b89\u5168\u4e0e\u7528\u6237\u4f53\u9a8c\u4e4b\u95f4\u53d6\u5f97\u6700\u4f73\u5e73\u8861\u3002\u4e0b\u6b21\u8bbe\u8ba1\u6570\u636e\u5b58\u50a8\u65b9\u6848\u65f6，\u8bf7\u5148\u95ee\u81ea\u5df1：\u8fd9\u4e2a\u6570\u636e\u662f\u5426\u9700\u8981\u968f\u8bf7\u6c42\u53d1\u9001？\u662f\u5426\u9700\u8981\u957f\u671f\u4fdd\u7559？\u662f\u5426\u53ea\u5c5e\u4e8e\u5f53\u524d\u4f1a\u8bdd？\u7b54\u6848\u5c31\u5728\u5176\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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