今天要写上传图片功能，研究了一下cropper。将图片上传服务器并保存到本地
html
<html>
<head>
<title>基于cropper.js的图片裁剪</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="format-detection" content="telephone=no">
<link rel="stylesheet" href="/css/ImgCropping.css">
<link rel="stylesheet" href="/css/cropper.min.css">
</head>
<body style="background: #eee">
<button id="replaceImg" class="l-btn">更换图片</button>
<div style="width: 320px;height:136.23px;border: solid 1px #555;margin-top: 10px">
<img id="finalImg" name="file" src="" width="100%">
</div>
<button type="button" onclick="update()">submit</button>
<!--图片裁剪框 start-->
<div style="display: none" class="tailoring-container">
<div class="black-cloth" onclick="closeTailor(this)"></div>
<div class="tailoring-content">
<div class="tailoring-content-one">
<label title="上传图片" for="chooseImg" class="l-btn choose-btn">
<input type="file" accept="image/jpg,image/jpeg,image/png" name="file" id="chooseImg" class="hidden" onchange="selectImg(this)">
选择图片
</label>
<div class="close-tailoring" onclick="closeTailor(this)">×</div>
</div>
<div class="tailoring-content-two">
<div class="tailoring-box-parcel">
<img id="tailoringImg">
</div>
<div class="preview-box-parcel">
<p>图片预览：</p>
<div class="square previewImg"></div>
<div class="circular previewImg"></div>
</div>
</div>
<div class="tailoring-content-three">
<button class="l-btn cropper-reset-btn">复位</button>
<button class="l-btn cropper-rotate-btn">旋转</button>
<button class="l-btn cropper-scaleX-btn">换向</button>
<button class="l-btn sureCut" id="sureCut">确定</button>
</div>
</div>
</div>
<!--图片裁剪框 end-->
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script src="/js/cropper.min.js"></script>
<script>
function update() {
var cas = $('#tailoringImg').cropper('getCroppedCanvas');
cas = cas.toDataURL('image/jpg');
console.log(cas)
$("#registerForm").attr("enctype","multipart/form-data");
var formData = new FormData($("#registerForm")[0]);
formData.append("imgBase64",encodeURIComponent(cas));
formData.append("fileFileName","photo.jpg");
console.log(formData)
$.ajax({
url: "/update",
type: 'POST',
data: formData,
timeout : 10000, //超时时间设置，单位毫秒
async: true,
cache: false,
contentType: false,
processData: false,
success: function (result) {
console.log(result)
window.location="/success";
},
error: function (returndata) {
}
});
}
//弹出框水平垂直居中
(window.onresize = function () {
var win_height = $(window).height();
var win_width = $(window).width();
if (win_width <= 768){
$(".tailoring-content").css({
"top": (win_height - $(".tailoring-content").outerHeight())/2,
"left": 0
});
}else{
$(".tailoring-content").css({
"top": (win_height - $(".tailoring-content").outerHeight())/2,
"left": (win_width - $(".tailoring-content").outerWidth())/2
});
}
})();
//弹出图片裁剪框
$("#replaceImg").on("click",function () {
$(".tailoring-container").toggle();
});
//图像上传
function selectImg(file) {
if (!file.files || !file.files[0]){
return;
}
var reader = new FileReader();
reader.onload = function (evt) {
var replaceSrc = evt.target.result;
//更换cropper的图片
$('#tailoringImg').cropper('replace', replaceSrc,false);//默认false，适应高度，不失真
}
reader.readAsDataURL(file.files[0]);
}
//cropper图片裁剪
$('#tailoringImg').cropper({
aspectRatio: 790/340,//默认比例
preview: '.previewImg',//预览视图
guides: false, //裁剪框的虚线(九宫格)
autoCropArea: 0.5, //0-1之间的数值，定义自动剪裁区域的大小，默认0.8
movable: false, //是否允许移动图片
dragCrop: true, //是否允许移除当前的剪裁框，并通过拖动来新建一个剪裁框区域
movable: true, //是否允许移动剪裁框
resizable: true, //是否允许改变裁剪框的大小
zoomable: false, //是否允许缩放图片大小
mouseWheelZoom: false, //是否允许通过鼠标滚轮来缩放图片
touchDragZoom: true, //是否允许通过触摸移动来缩放图片
rotatable: true, //是否允许旋转图片
crop: function(e) {
// 输出结果数据裁剪图像。
}
});
//旋转
$(".cropper-rotate-btn").on("click",function () {
$('#tailoringImg').cropper("rotate", 45);
});
//复位
$(".cropper-reset-btn").on("click",function () {
$('#tailoringImg').cropper("reset");
});
//换向
var flagX = true;
$(".cropper-scaleX-btn").on("click",function () {
if(flagX){
$('#tailoringImg').cropper("scaleX", -1);
flagX = false;
}else{
$('#tailoringImg').cropper("scaleX", 1);
flagX = true;
}
flagX != flagX;
});
//裁剪后的处理
$("#sureCut").on("click",function () {
if ($("#tailoringImg").attr("src") == null ){
return false;
}else{
var cas = $('#tailoringImg').cropper('getCroppedCanvas');//获取被裁剪后的canvas
var base64url = cas.toDataURL('image/png'); //转换为base64地址形式
$("#finalImg").prop("src",base64url);//显示为图片的形式
//关闭裁剪框
closeTailor();
}
});
//关闭裁剪框
function closeTailor() {
$(".tailoring-container").toggle();
}
</script>
</body>
</html>
然后是控制器
@RequestMapping(value = "/update", method = RequestMethod.POST)
@ResponseBody
public String update(String imgBase64,String fileFileName) throws UnsupportedEncodingException {
imgBase64 = URLDecoder.decode(imgBase64,"UTF-8");
System.out.println(imgBase64+","+fileFileName);
imgBase64 = imgBase64.substring(22);
BASE64Decoder decoder = new BASE64Decoder();
try {
// Base64解码
byte[] b = decoder.decodeBuffer(imgBase64);
for (int i = 0; i < b.length; ++i) {
if (b[i] < 0) {
b[i] += 256;
}
}
OutputStream out = new FileOutputStream("D:/image/headPortrait/photo.jpg");
out.write(b);
out.flush();
out.close();
} catch (Exception e) {
return "false";
}
return "hi";
}
下面是我的demo
demo
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