{"id":3174,"date":"2024-11-10T10:44:25","date_gmt":"2024-11-10T02:44:25","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3174\/"},"modified":"2024-11-10T10:44:25","modified_gmt":"2024-11-10T02:44:25","slug":"js%e5%a6%82%e4%bd%95%e5%8f%96json%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3174\/","title":{"rendered":"js\u5982\u4f55\u53d6json\u6570\u636e"},"content":{"rendered":"<blockquote><p>\n  \u8981\u83b7\u53d6 json \u6570\u636e\uff0cjavascript \u63d0\u4f9b\u4e86\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u4f7f\u7528 xmlhttprequest \u5bf9\u8c61\uff1a\u521b\u5efa xmlhttprequest \u5bf9\u8c61\u6253\u5f00 http \u8bf7\u6c42\u8bbe\u7f6e\u63a5\u53d7 json \u6570\u636e\u7684\u8bf7\u6c42\u5934\u53d1\u9001\u8bf7\u6c42\u76d1\u542c\u670d\u52a1\u5668\u54cd\u5e94\u5e76\u63d0\u53d6 json \u6570\u636e\u4f7f\u7528 fetch() \u65b9\u6cd5\uff1a\u4f7f\u7528 fetch() \u65b9\u6cd5\u53d1\u9001\u8bf7\u6c42\u7b49\u5f85\u670d\u52a1\u5668\u54cd\u5e94\u5c06\u54cd\u5e94\u8f6c\u6362\u4e3a json \u6570\u636e\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/08\/2024110806123038395.jpg\" class=\"aligncenter\" title=\"js\u5982\u4f55\u53d6json\u6570\u636e\u63d2\u56fe\" alt=\"js\u5982\u4f55\u53d6json\u6570\u636e\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6 JSON \u6570\u636e<\/strong><\/p>\n<p>\u83b7\u53d6 JSON \u6570\u636e\u662f JavaScript \u4e2d\u4e00\u9879\u5e38\u89c1\u4e14\u91cd\u8981\u7684\u4efb\u52a1\uff0c\u53ef\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u52a0\u8f7d\u6570\u636e\u6216\u4e0e API \u4ea4\u4e92\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6 JSON \u6570\u636e\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 XMLHttpRequest \u5bf9\u8c61<\/strong><\/p>\n<p>\u8fd9\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u5b83\u6d89\u53ca\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u521b\u5efa\u4e00\u4e2a XMLHttpRequest \u5bf9\u8c61\u3002<\/li>\n<li>\u6253\u5f00\u4e00\u4e2a HTTP \u8bf7\u6c42\uff0c\u6307\u5b9a\u8bf7\u6c42\u65b9\u6cd5 (GET \u6216 POST) \u548c URL\u3002<\/li>\n<li>\u8bbe\u7f6e\u8bf7\u6c42\u5934\uff0c\u6307\u5b9a\u63a5\u53d7 JSON \u6570\u636e (Accept: application\/json)\u3002<\/li>\n<li>\u53d1\u9001\u8bf7\u6c42\u3002<\/li>\n<li>\u76d1\u542c\u670d\u52a1\u5668\u54cd\u5e94\uff0c\u5e76\u63d0\u53d6\u7ed3\u679c\u4e2d\u7684 JSON \u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>2. \u4f7f\u7528 fetch() \u65b9\u6cd5<\/strong><\/p>\n<p>fetch() \u65b9\u6cd5\u662f\u4e00\u4e2a\u8f83\u65b0\u7684\u65b9\u6cd5\uff0c\u5b83\u7b80\u5316\u4e86 XMLHttpRequest \u5bf9\u8c61\u7684\u4f7f\u7528\u3002\u5b83\u9075\u5faa\u7c7b\u4f3c\u7684\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 fetch() \u65b9\u6cd5\u53d1\u9001\u8bf7\u6c42\uff0c\u6307\u5b9a\u8bf7\u6c42 URL\u3002<\/li>\n<li>\u7b49\u5f85\u670d\u52a1\u5668\u54cd\u5e94\u3002<\/li>\n<li>\u5c06\u54cd\u5e94\u8f6c\u6362\u4e3a JSON \u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>\/\/ XMLHttpRequest \u5bf9\u8c61\nconst xhr = new XMLHttpRequest();\nxhr.open(\"GET\", \"data.json\");\nxhr.setRequestHeader(\"Accept\", \"application\/json\");\nxhr.send();\n\nxhr.onreadystatechange = function() {\n  if (xhr.readyState === 4 &amp;&amp; xhr.status === 200) {\n    const data = JSON.parse(xhr.responseText);\n    \/\/ \u5904\u7406\u6570\u636e...\n  }\n};\n\n\/\/ fetch() \u65b9\u6cd5\nfetch(\"data.json\")\n.then(response =&gt; response.json())\n.then(data =&gt; {\n  \/\/ \u5904\u7406\u6570\u636e...\n})\n.catch(error =&gt; {\n  \/\/ \u5904\u7406\u9519\u8bef...\n});<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u786e\u4fdd\u670d\u52a1\u5668\u4ee5 JSON \u683c\u5f0f\u63d0\u4f9b\u6570\u636e\u3002<\/li>\n<li>\u5728\u5904\u7406 JSON \u6570\u636e\u4e4b\u524d\uff0c\u9700\u8981\u5c06\u5176\u89e3\u6790\u4e3a JavaScript \u5bf9\u8c61\u3002<\/li>\n<li>\u5bf9\u4e8e\u5f02\u6b65\u8bf7\u6c42\uff0c\u4f60\u9700\u8981\u4f7f\u7528\u56de\u8c03\u51fd\u6570\u6216 Promise \u6765\u5904\u7406\u7ed3\u679c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjs\u5982\u4f55\u53d6json\u6570\u636e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u83b7\u53d6 json \u6570\u636e\uff0cjavascript \u63d0\u4f9b\u4e86\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u4f7f\u7528 xmlhttprequest \u5bf9\u8c61\uff1a\u521b\u5efa xmlhttprequest \u5bf9\u8c61\u6253\u5f00 http \u8bf7\u6c42\u8bbe\u7f6e\u63a5\u53d7 json \u6570\u636e\u7684\u8bf7\u6c42\u5934\u53d1\u9001\u8bf7\u6c42\u76d1\u542c\u670d\u52a1\u5668\u54cd\u5e94\u5e76\u63d0\u53d6 json \u6570\u636e\u4f7f\u7528 fetch() \u65b9\u6cd5\uff1a\u4f7f\u7528 fetch() \u65b9\u6cd5\u53d1\u9001\u8bf7\u6c42\u7b49\u5f85\u670d\u52a1\u5668\u54cd\u5e94\u5c06\u54cd\u5e94\u8f6c\u6362\u4e3a json \u6570\u636e \u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6 JSON \u6570\u636e \u83b7\u53d6 JSON \u6570\u636e\u662f JavaScript \u4e2d\u4e00\u9879\u5e38\u89c1\u4e14\u91cd\u8981\u7684\u4efb\u52a1\uff0c\u53ef\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u52a0\u8f7d\u6570\u636e\u6216\u4e0e API \u4ea4\u4e92\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528 JavaScript \u83b7\u53d6 JSON \u6570\u636e\uff1a 1. \u4f7f\u7528 XMLHttpRequest \u5bf9\u8c61 \u8fd9\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u5b83\u6d89\u53ca\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u521b\u5efa\u4e00\u4e2a XMLHttpRequest \u5bf9\u8c61\u3002 \u6253\u5f00\u4e00\u4e2a HTTP \u8bf7\u6c42\uff0c\u6307\u5b9a\u8bf7\u6c42\u65b9\u6cd5 (GET \u6216 POST) \u548c URL\u3002 \u8bbe\u7f6e\u8bf7\u6c42\u5934\uff0c\u6307\u5b9a\u63a5\u53d7 JSON \u6570\u636e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3174","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3174","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=3174"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3174\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}