{"id":167045,"date":"2024-05-08T15:54:42","date_gmt":"2024-05-08T07:54:42","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/167045.html"},"modified":"2024-05-08T15:54:46","modified_gmt":"2024-05-08T07:54:46","slug":"javascript%e5%8f%af%e4%bb%a5%e4%b8%bb%e5%8a%a8%e8%af%bb%e5%8f%96%e6%9c%ac%e5%9c%b0%e6%96%87%e4%bb%b6%e5%90%97","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/167045.html","title":{"rendered":"javascript\u53ef\u4ee5\u4e3b\u52a8\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5417"},"content":{"rendered":"

\"javascript\u53ef\u4ee5\u4e3b\u52a8\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5417\"<\/p>\n

\u7531\u4e8e\u5b89\u5168\u6027\u548c\u9690\u79c1\u7684\u8003\u8651\uff0cJavaScript\u65e0\u6cd5\u76f4\u63a5\u8bfb\u53d6\u7528\u6237\u7684\u672c\u5730\u6587\u4ef6<\/strong>\uff0c\u9664\u975e\u7528\u6237\u901a\u8fc7\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684\u673a\u5236\uff08\u5982\u6587\u4ef6\u4e0a\u4f20\u63a7\u4ef6\uff09\u4e3b\u52a8\u9009\u62e9\u6587\u4ef6\u3002\u8fd9\u662f\u4e00\u79cd\u4fdd\u62a4\u673a\u5236\uff0c\u907f\u514d\u6076\u610f\u7f51\u9875\u8bfb\u53d6\u7528\u6237\u8ba1\u7b97\u673a\u4e0a\u7684\u79c1\u4eba\u6587\u4ef6\u3002\u5c3d\u7ba1\u5982\u6b64\uff0cHTML5\u5f15\u5165\u4e86File API\uff0c\u4f7f\u5f97\u5728\u7528\u6237\u6388\u6743\u7684\u60c5\u51b5\u4e0b\uff0cJavaScript\u53ef\u4ee5\u8bfb\u53d6\u7528\u6237\u9009\u4e2d\u7684\u6587\u4ef6\u7684\u5185\u5bb9<\/strong>\u3002\u8fd9\u4e00\u53d8\u5316\u4e3a\u7f51\u9875\u5e94\u7528\u63d0\u4f9b\u4e86\u8bfb\u53d6\u548c\u5904\u7406\u672c\u5730\u6587\u4ef6\u7684\u80fd\u529b\uff0c\u5c24\u5176\u662f\u5728\u6784\u5efa\u590d\u6742\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u65f6\uff0c\u5982\u56fe\u7247\u7f16\u8f91\u5668\u6216\u5ba2\u6237\u7aef\u5b58\u50a8\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<\/p>\n

\u4e00\u3001HTML5 FILE API\u7b80\u4ecb<\/h3>\n<\/p>\n

HTML5\u7684File API\u5141\u8bb8\u7f51\u9875\u4e0e\u7528\u6237\u9009\u4e2d\u7684\u6587\u4ef6\u8fdb\u884c\u4ea4\u4e92\u3002\u8fd9\u4e2aAPI\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u63a5\u53e3\uff0c\u8ba9\u5f00\u53d1\u8005\u80fd\u591f\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u83b7\u53d6\u6587\u4ef6\u4fe1\u606f\u4ee5\u53ca\u76d1\u63a7\u6587\u4ef6\u8bfb\u53d6\u8fc7\u7a0b\u7684\u72b6\u6001\u3002\u901a\u8fc7 <input type="file"><\/code> \u63a7\u4ef6\uff0c\u7528\u6237\u53ef\u4ee5\u9009\u62e9\u4ed6\u4eec\u60f3\u8981\u4e0a\u4f20\u7684\u6587\u4ef6\uff0c\u7136\u540eJavaScript\u53ef\u4ee5\u901a\u8fc7File API\u8bfb\u53d6\u8fd9\u4e9b\u6587\u4ef6\u7684\u5185\u5bb9\u6216\u5c5e\u6027\u3002<\/p>\n<\/p>\n

\u4f7f\u7528FileReader\u8bfb\u53d6\u6587\u4ef6<\/h4>\n<\/p>\n

FileReader\u5bf9\u8c61\u4f7f\u5f97JavaScript\u80fd\u591f\u5f02\u6b65\u8bfb\u53d6\u5b58\u50a8\u5728\u7528\u6237\u8ba1\u7b97\u673a\u4e0a\u7684\u6587\u4ef6\u3002\u5f53\u7528\u6237\u9009\u62e9\u4e86\u6587\u4ef6\u540e\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528FileReader\u6765\u8bfb\u53d6\u6587\u4ef6\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u5f02\u6b65\u7684\uff0c\u610f\u5473\u7740JavaScript\u4f1a\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\uff0c\u800c\u6587\u4ef6\u8bfb\u53d6\u5728\u540e\u53f0\u8fdb\u884c\u3002FileReader\u63d0\u4f9b\u4e86\u51e0\u79cd\u8bfb\u53d6\u65b9\u6cd5\uff0c\u5305\u62ec\uff1a<\/p>\n<\/p>\n

    \n
  • readAsText(file)<\/code>\uff1a\u5c06\u6587\u4ef6\u8bfb\u53d6\u4e3a\u6587\u672c\u3002<\/li>\n
  • readAsDataURL(file)<\/code>\uff1a\u8bfb\u53d6\u6587\u4ef6\u5e76\u5c06\u6587\u4ef6\u4ee5\u6570\u636eURL\u7684\u5f62\u5f0f\u8868\u793a\u3002<\/li>\n
  • readAsArrayBuffer(file)<\/code>\uff1a\u5c06\u6587\u4ef6\u8bfb\u53d6\u4e3aArrayBuffer\uff0c\u9002\u7528\u4e8e\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/li>\n<\/ul>\n

    \u4e8c\u3001\u5728\u7f51\u9875\u4e2d\u4f7f\u7528File API\u8fdb\u884c\u6587\u4ef6\u5904\u7406<\/h3>\n<\/p>\n

    \u5b9e\u73b0\u6587\u4ef6\u8bfb\u53d6\u7684\u57fa\u672c\u6b65\u9aa4\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u73af\u8282\uff1a\u5728HTML\u4e2d\u521b\u5efa\u6587\u4ef6\u4e0a\u4f20\u63a7\u4ef6\uff0c\u4f7f\u7528JavaScript\u76d1\u542c\u63a7\u4ef6\u7684change<\/code>\u4e8b\u4ef6\uff0c\u7136\u540e\u4f7f\u7528FileReader\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

    <input type="file" id="fileInput"><\/p>\n
    <script><\/p>\n
      document.getElementById('fileInput').addEventListener('change', function(event) {<\/p>\n
        var file = event.target.files[0];<\/p>\n
        if (file) {<\/p>\n
          var reader = new FileReader();<\/p>\n
          reader.onload = function(e) {<\/p>\n
            console.log(e.target.result);<\/p>\n
          };<\/p>\n
          reader.readAsText(file);<\/p>\n
        }<\/p>\n
      });<\/p>\n
    <\/script><\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u6587\u4ef6\u5904\u7406\u7684\u9ad8\u7ea7\u5e94\u7528<\/h4>\n<\/p>\n
    \u9664\u4e86\u57fa\u672c\u7684\u6587\u4ef6\u8bfb\u53d6\u4e4b\u5916\uff0cFile API\u548cFileReader\u4e5f\u652f\u6301\u66f4\u590d\u6742\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5904\u7406\u548c\u5206\u6790\u56fe\u7247\u6587\u4ef6\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u5e76\u89e3\u6790\u6570\u636e\u3001\u5b9e\u73b0\u5ba2\u6237\u7aef\u52a0\u5bc6\u7b49\u3002\u8fd9\u4e9b\u9ad8\u7ea7\u5e94\u7528\u6269\u5c55\u4e86JavaScript\u5904\u7406\u672c\u5730\u6587\u4ef6\u7684\u80fd\u529b\uff0c\u4e3a\u5f00\u53d1\u4e30\u5bcc\u548c\u5177\u6709\u4ea4\u4e92\u6027\u7684\u7f51\u9875\u5e94\u7528\u63d0\u4f9b\u4e86\u66f4\u591a\u53ef\u80fd\u3002<\/p>\n<\/p>\n
    \u4e09\u3001\u5b89\u5168\u6027\u8003\u8651<\/h3>\n<\/p>\n
    \u5728\u4f7f\u7528JavaScript\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136\u6280\u672f\u4e0a\u53ef\u884c\uff0c\u4f46\u51fa\u4e8e\u5b89\u5168\u6027\u8003\u8651\uff0c\u7f51\u9875\u5e94\u7528\u53ea\u80fd\u5728\u7528\u6237\u663e\u5f0f\u64cd\u4f5c\u7684\u60c5\u51b5\u4e0b\u8bbf\u95ee\u672c\u5730\u6587\u4ef6\u3002\u8fd9\u610f\u5473\u7740\uff0c\u6240\u6709\u6587\u4ef6\u8bfb\u53d6\u64cd\u4f5c\u90fd\u5fc5\u987b\u7531\u7528\u6237\u89e6\u53d1\uff0c\u4f8b\u5982\u901a\u8fc7\u70b9\u51fb\u6309\u94ae\u6216\u9009\u62e9\u6587\u4ef6\u3002\u5f00\u53d1\u8005\u5e94\u9075\u5b88\u8fd9\u4e00\u539f\u5219\uff0c\u786e\u4fdd\u5e94\u7528\u5b89\u5168\uff0c\u5c0a\u91cd\u7528\u6237\u7684\u9690\u79c1\u548c\u6570\u636e\u5b89\u5168\u3002<\/p>\n<\/p>\n
    \u907f\u514d\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff08XSS\uff09<\/h4>\n<\/p>\n
    \u5904\u7406\u6765\u81ea\u7528\u6237\u7684\u6587\u4ef6\u65f6\uff0c\u5f00\u53d1\u8005\u8fd8\u9700\u8981\u8b66\u60d5\u6f5c\u5728\u7684\u5b89\u5168\u5a01\u80c1\uff0c\u5982\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff08XSS\uff09\u3002\u5f53\u8bfb\u53d6\u5e76\u5c55\u793a\u6587\u4ef6\u5185\u5bb9\u65f6\uff0c\u4e00\u5b9a\u8981\u5bf9\u5185\u5bb9\u8fdb\u884c\u9002\u5f53\u7684\u6e05\u7406\u548c\u8f6c\u4e49\uff0c\u907f\u514d\u6267\u884c\u6076\u610f\u4ee3\u7801\u3002<\/p>\n<\/p>\n
    \u56db\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n
    \u867d\u7136JavaScript\u4e0d\u80fd\u4e3b\u52a8\u201c\u8bbf\u95ee\u201d\u7528\u6237\u7684\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\uff0c\u4f46\u5229\u7528HTML5\u7684File API\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u7528\u6237\u6388\u6743\u7684\u60c5\u51b5\u4e0b\u9ad8\u6548\u5730\u8bfb\u53d6\u9009\u4e2d\u7684\u6587\u4ef6\u3002\u8fd9\u4e00\u673a\u5236\u65e2\u4fdd\u969c\u4e86\u7528\u6237\u7684\u9690\u79c1\u5b89\u5168\uff0c\u53c8\u4e30\u5bcc\u4e86\u7f51\u9875\u5e94\u7528\u7684\u529f\u80fd\u6027\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528File API\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u51fa\u529f\u80fd\u5f3a\u5927\u4e14\u7528\u6237\u53cb\u597d\u7684\u7f51\u9875\u5e94\u7528\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
    1. JavaScript\u53ef\u4ee5\u901a\u8fc7\u6587\u4ef6\u8f93\u5165\u5143\u7d20\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5417\uff1f<\/strong><\/p>\n
    \u5f53\u7528\u6237\u4f7f\u7528\u6587\u4ef6\u8f93\u5165\u5143\u7d20<input type="file"><\/code>\u9009\u62e9\u672c\u5730\u6587\u4ef6\u65f6\uff0cJavaScript\u53ef\u4ee5\u901a\u8fc7\u4e8b\u4ef6\u76d1\u542c\u6765\u8bfb\u53d6\u8be5\u6587\u4ef6\u3002\u901a\u8fc7\u76d1\u542cchange<\/code>\u4e8b\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528FileReader<\/code>\u5bf9\u8c61\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u5e76\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u6cd5\u4ec5\u9650\u4e8e\u7528\u6237\u4e3b\u52a8\u9009\u62e9\u5e76\u4e0a\u4f20\u6587\u4ef6\u3002<\/p>\n
    2. JavaScript\u53ef\u4ee5\u4f7f\u7528File API\u4e3b\u52a8\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5417\uff1f<\/strong><\/p>\n
    \u662f\u7684\uff0c\u901a\u8fc7HTML5\u7684File API\uff0cJavaScript\u53ef\u4ee5\u76f4\u63a5\u4ece\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u4e2d\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002File API\u63d0\u4f9b\u4e86\u4e00\u4e9b\u63a5\u53e3\u548c\u65b9\u6cd5\uff0c\u5982FileReader<\/code>\u5bf9\u8c61\uff0c\u7528\u4e8e\u8bfb\u53d6\u548c\u64cd\u4f5c\u672c\u5730\u6587\u4ef6\u3002\u8fd9\u4f7f\u5f97\u5f00\u53d1\u8005\u53ef\u4ee5\u901a\u8fc7JavaScript\u4e3b\u52a8\u8bfb\u53d6\u7528\u6237\u6307\u5b9a\u7684\u672c\u5730\u6587\u4ef6\uff0c\u800c\u4e0d\u9700\u8981\u7528\u6237\u4e3b\u52a8\u9009\u62e9\u6216\u4e0a\u4f20\u6587\u4ef6\u3002<\/p>\n
    3. JavaScript\u53ef\u4ee5\u4f7f\u7528AJAX\u8bf7\u6c42\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5417\uff1f<\/strong><\/p>\n
    JavaScript\u672c\u8eab\u4e0d\u80fd\u76f4\u63a5\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u5185\u5bb9\u3002\u7531\u4e8e\u5b89\u5168\u6027\u8003\u8651\uff0c\u6d4f\u89c8\u5668\u9650\u5236\u4e86JavaScript\u5728\u5ba2\u6237\u7aef\u8bbf\u95ee\u672c\u5730\u6587\u4ef6\u7684\u80fd\u529b\u3002\u8fd9\u662f\u4e3a\u4e86\u4fdd\u62a4\u7528\u6237\u7684\u9690\u79c1\u548c\u9632\u6b62\u6076\u610f\u4ee3\u7801\u6ee5\u7528\u6587\u4ef6\u7cfb\u7edf\u3002\u5982\u679c\u60a8\u9700\u8981\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\u5185\u5bb9\uff0c\u60a8\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u670d\u52a1\u5668\u7aef\u811a\u672c\uff0c\u5ba2\u6237\u7aef\u5c06\u6587\u4ef6\u4e0a\u4f20\u81f3\u670d\u52a1\u5668\uff0c\u7136\u540e\u901a\u8fc7AJAX\u8bf7\u6c42\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5e76\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u8fdb\u884c\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u7531\u4e8e\u5b89\u5168\u6027\u548c\u9690\u79c1\u7684\u8003\u8651\uff0cJavaScript\u65e0\u6cd5\u76f4\u63a5\u8bfb\u53d6\u7528\u6237\u7684\u672c\u5730\u6587\u4ef6\uff0c\u9664\u975e\u7528\u6237\u901a\u8fc7\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684\u673a\u5236\uff08\u5982\u6587\u4ef6\u4e0a […]","protected":false},"author":3,"featured_media":167047,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/167045"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=167045"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/167045\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/167047"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=167045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=167045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=167045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}