Canvas实现保存图片到本地的示例代码html2canvas把div保存图片高清图的方法示例在HTML5 Canvas中放入图片和保存为图片的方法HTML5 canvas画图并保存成图片的jcanvas插件将HTML5 Canvas的内容保存为图片借助toDataURL实现

 //canvas绘制部分代码： var picurl = "http://wx.qlogo.cn/mmopen/OicsrgN57fqDxImI3icnMeSXRfVUQRueHcxRRuWG0O1Ea1bNyBPKKKLeq5FiaXFWOdsltVe1R1PtJ2EtsDHYDjHgQ/0"; var img = new Image, canvas = document.createElement("canvas"), ctx = canvas.getContext("2d"), //后台nigix代理 参见问题2 src = picurl.replace("http://wx.qlogo.cn","//wq.jd.com"); //解决 canvas 跨域 toDataURL不能读取问题 参见问题1 img.crossOrigin = "Anonymous"; //图片资源的预加载 img.onload = function() { canvas.width = img.width; canvas.height = img.height; ctx.drawImage( img, 0, 0 ); //将画好的base64图片 localStorage.setItem( "savedImageData", canvas.toDataURL("image/png") ); } img.src = src; 

 // 上传图片 参见问题3 $.ajax({ type: 'POST', url: loadJs.addToken('http://wq.jd.com/activetmp/promotepic/promoteaddpic', "j132"), data: { filename: new Date().getTime()+''+Math.floor(Math.random()*10000) + '.jpg', content: base64pic, active: "shotpic20160901" }, dataType: 'json', xhrFields: { withCredentials: true }, success: function(data) { if (picdata.id == 1 && picdata.msg) { //图片路径 此前缀路径的图片最清晰 参见问题4 var imgPre = 'http://img10.360buyimg.com/promotepic/'; //图片地址拼接的完整地址链接 var photo = imgPre + picdata.msg; $("#cardImg")[0].onload = function() { //to do 业务逻辑 }; $("#cardImg").attr("src",photo); } }, error:function(data){ } });