<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <meta name="viewport" content="width=device-width,initial-scale=1" /> <title>ArrayBuffer and Base64</title> </head> <body> <img id="bbf" src="" /> <img id="bbf2" src="" /> <script> /** * Base64字符串转成ArrayBuffer数组 * @param {String} base64 */ function base64ToArrayBuffer(base64) { var binary_string = window.atob(base64); var len = binary_string.length; var bytes = new Uint8Array(len); for (var i = 0; i < len; i++){ bytes[i] = binary_string.charCodeAt(i); } return bytes.buffer; } /** * ArrayBuffer数组转成Base64字符串 * @param {ArrayBuffer} buffer */ function arrayBufferToBase64(buffer){ var binary = ''; var bytes = new Uint8Array(buffer); var len = bytes.byteLength; for (var i = 0; i < len; i++){ binary += String.fromCharCode(bytes[i]); } return window.btoa( binary ); } window.onload = function(){ var buff = base64ToArrayBuffer(base64Img.split(',')[1]); var _blob = new Blob([buff]); var imageURI = window.URL.createObjectURL(_blob); var imgobj = document.getElementById("bbf"); imgobj.onload = function(){window.URL.revokeObjectURL(this.src);};//清除释放 imgobj.setAttribute("src", imageURI); var imgobj = document.getElementById("bbf2"); imgobj.setAttribute("src", base64Img); } var base64Img = "data:image/gif;base64,R0lGODlhGAAYAPfaAOtxR/FJAPdPAPlRAO5GAPNLAP/9/PtUAP6UW/RMAO9HAO1EAOY9AP/axuhAAPZOAOVGD/VNAPhQAPdOAO9GAPlSAOU9AOpBAPNKAP6WXutCAPpTAOlhM/+icOtiLvtrI/l0NPh0N+17U/ZyN/6sgf7s5P+whe9UFu15UOdGDPyMVPGZe/6tgfmIVPyRXedLE/lfFP6ERPdWC/6hb/d6QvJUD/JtNO1GA/+yieplOP1kEv7l2P6QWOpIC/VpK+ZRHf/v6PdsLf1uI/uQXfvi2v2aZ/yHTOU+Av6aZvi/qPqOW/qDS/6CQvFNBvuES/9tHu+FX/5qGv6SWPexlP/h0f/Bn/18OexHB/dYD/eBTPtoH/qGUP+ugvl9Q+lBAeZMGPyKUf/ezP+ga+ZHEOtMDvzo4ehfMOtkM/97NPyid//BoPpSAPlwMP7j1eM7AeRCCuVDCuZQHPJkKv3o3+lBAPjPwf7Iq/ppI/6JTf/IquRBCf/j1PSRaf2PVuplN/2yjf6FRuM6AOtgLfvg1fyERvpgFv/FpeM8AupICfuIUPhaEvxzLfuaavZYEOY/A/W8qP6JS+pHCOc+AP7VwPt8Pfyaafzq5Pzl3PvYye1fJ/1+POtfKvS0nv/u5PtlGehECP2UYOdCBvx1MPNyPft+QuxWHPCXeOpCAP3KseQ+Bf2cavyyjvdSBP6bZelSGuZBBuVKFf6da+tuQ/Z8R/yRW/RQBvVwNf/GpvtVAPFkKf+5kvuke/+8l/fGtP6OU/eacu1mMv/Gp+pDAv+whO5kL+ZMF/+7l/7Dpf1YA/ypgfx6OOdZKPRLAOhSG/+zivBXGPBNCf+bZPNpLf/n2/NMAf6YY/94LvyHS/ZjIP7QuAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAANoALAAAAAAYABgAAAj/ALUJHEiwoMGDCBMqXMiwocOHBHdcQ6YDUgOCbYYEkcZn0EFUyrJ12qPLWhWBxzw5aTErF6JeBUvcATKNSpgGatDwMiYEFCMlWUYRc2SJ4K5kk+wYCpbn1rAnUaqpcrGFho1MKVYQZLPqDwkWJnA44xItAxJaibqMkFMqlBmCWNJUKhJrRocOYlpl6GOEVAgfzyJZgECw0RIwKnggWCzFFx5ClEBgq3HDwRE9BG0pgqFlkRUmgGJoEvWhkAxqCjRIgpOD4K9arAZsOHAAF+0NAwQkCLDAy4tipgjOCZBggoQBFdZUGCBhwm4Cwlz5eVOGoAFMTQpEeCCg+4MIBQIQZLjiAcWXOgYMToEWAEMBZgUwBFCwgMwmKD84ITSQ5AQBCgpQQMACGvQgiAhxPLLQJcBccMoFdDjwSTOycEBEQwacwQADFrwyxjIcQKQNAIe4AQEsAIgoEACBpJKiiiu+CKNDAQEAOw=="; </script> </body> </html>