怎么得到图片的base64编码 - 技术问答如题 谢谢了 如何把img元素里面的图片的base64编码获取
\u600e\u4e48\u5f97\u5230\u56fe\u7247\u7684base64\u7f16\u7801 - \u6280\u672f\u95ee\u7b54\u8981\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\uff0c\u8981\u4f7f\u7528canvas\u6765\u505a\uff0cCanvas\u91cc\u9762\u63d0\u4f9b\u4e86\u4e00\u4e2atoDataURL\u7684\u63a5\u53e3\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u63a5\u53e3\u83b7\u5f97\u56fe\u7247\u7684base64\u3002
\u6240\u4ee5\u601d\u8def\u662f\uff1a
\u83b7\u5f97canvas\u5bf9\u8c61
\u52a0\u8f7d\u56fe\u7247\u5230canvas\u5bf9\u8c61\u91cc\u9762
\u4ececanvas\u5bf9\u8c61\u4e2d\u83b7\u53d6base64\u6570\u636e
\u7ed9\u4e2a\u4f8b\u5b50\uff1a
Document
function getBase64Image(img) {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, img.width, img.height);
var dataURL = canvas.toDataURL("image/png");
return dataURL
// return dataURL.replace("data:image/png;base64,", "");
}
function main() {
var img = document.createElement('img');
img.src = './images/yeoman.png';
img.onload =function() {
var data = getBase64Image(img);
console.log(data);
}
document.body.appendChild(img);
}
main()
\u7136\u540e\u53ef\u4ee5\u5728\u63a7\u5236\u53f0\u770b\u5230base64\u7684\u6570\u636e\u3002
\u6211\u89c9\u5f97\u5b9a\u4e49\u4e00\u4e2ajava\u7c7b\u64cd\u4f5c\u6587\u4ef6\uff0c\u7528js\u53bb\u8c03\u7528\u5b83\uff0c\u6700\u76f4\u63a5\u6700\u7b80\u5355\u3002
\u5982\u679c\u4e0d\u7528file:// \u8bbf\u95ee\u7684\u8bdd\uff0c\u5012\u662f\u8fd8\u53ef\u4ee5\u4f7f\u7528CORS\u89e3\u51b3\u8de8\u57df\u3001canvas\u7684getImageData\u3001toDataURL\u4e4b\u7c7b\u7684\u65b9\u6cd5\u8bfb\u53d6\u6570\u636e\u3002
满意请采纳
就是直接将图片文件的编码base64_encode啊, 不信你这样试试.[php] 查看原帖>>
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绛旓細String s = new sun.misc.BASE64Encoder().encode(url.getByte());
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