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| window.onload=function(){
document.getElementById("id-face").addEventListener("change", function(){
onFileChange(this,"face-result","face-empty-result")
});
document.getElementById("id-back").addEventListener("change", function(){
onFileChange(this,"back-result","back-empty-result")
});
document.getElementsByClassName("btn")[0].addEventListener("click", function(){
submit();
});
};
/**
* 选中图片时的处理
* @param {*} fileObj input file元素
* @param {*} el //选中后用于显示图片的元素ID
* @param {*} btnel //未选中图片时显示的按钮区域ID
*/
function onFileChange(fileObj,el,btnel){
var windowURL = window.URL || window.webkitURL;
var dataURL;
var imgObj = document.getElementById(el);
document.getElementById(btnel).style.display="none";
imgObj.style.display="block";
if (fileObj && fileObj.files && fileObj.files[0]) {
dataURL = windowURL.createObjectURL(fileObj.files[0]);
imgObj.src=dataURL;
} else {
dataURL = fileObj.value;
imgObj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
imgObj.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = dataURL;
}
}
/**
* 将图片压缩后返回base64格式的数据
* @param {*} image img元素
* @param {*} width 压缩后图片宽度
* @param {*} height 压缩后图片高度
* @param {*} qua //图片质量1-100
*/
function compressImageTobase64(image,width,height,qua){
var quality = qua ? qua / 100 : 0.8;
var canvas = document.createElement("canvas"),
ctx = canvas.getContext('2d');
var w = image.naturalWidth,
h = image.naturalHeight;
canvas.width = width||w;
canvas.height = height||h;
ctx.drawImage(image, 0, 0, w, h, 0, 0, width||w, height||h);
var data = canvas.toDataURL("image/jpeg", quality);
return data;
}
//提交
function submit(){
//1、form提交
//document.getElementById("mainForm").submit();
//2、压缩后ajax提交
var face_data=compressImageTobase64(document.getElementById("face-result"),200,100,90);
var back_data=compressImageTobase64(document.getElementById("back-result"),200,100,90);
var formData = new FormData();
formData.append("face",face_data);
formData.append("back",back_data);
//需引入jQuery
$.ajax({
url:"/地址",
type: 'POST',
cache: false,
data: formData,
timeout:180000,
processData: false,
contentType: false,
success:function(r){
},
error:function(r){
}
});
}
|
