html5+jquery上传图片拖拽裁剪插件，主要用于实现头像上传裁剪，放大缩小图片左右旋转图片
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jquery头像上传裁剪特效代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>html5上传图片拖拽裁剪插件_jquery裁剪头像上传</title>
<script src="head/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<link href="head/cropper.min.css" rel="stylesheet">
<link href="head/sitelogo.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="css/font-awesome.min.css">
<script src="head/bootstrap.min.js"></script>
<script src="head/cropper.js"></script>
<script src="head/sitelogo.js"></script>
<style type="text/css">
.avatar-btns button {
height: 35px;
}
</style>
</head>
<body>
<center>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#avatar-modal" style="margin: 10px;">修改头像</button>
</center>
<div class="user_pic" style="margin: 10px;">
<img src="">
</div>
<div class="modal fade" id="avatar-modal" aria-hidden="true" aria-labelledby="avatar-modal-label" role="dialog" tabindex="-1">
<div class="modal-dialog modal-lg">
<div class="modal-content">
<!--<form class="avatar-form" action="upload-logo.php" enctype="multipart/form-data" method="post">-->
<form class="avatar-form">
<div class="modal-header">
<button class="close" data-dismiss="modal" type="button">×</button>
<h4 class="modal-title" id="avatar-modal-label">上传图片</h4>
</div>
<div class="modal-body">
<div class="avatar-body">
<div class="avatar-upload">
<input class="avatar-src" name="avatar_src" type="hidden">
<input class="avatar-data" name="avatar_data" type="hidden">
<label for="avatarInput" style="line-height: 35px;">图片上传</label>
<button class="btn btn-danger" type="button" style="height: 35px;" onClick="$('input[id=avatarInput]').click();">请选择图片</button>
<span id="avatar-name"></span>
<input class="avatar-input hide" id="avatarInput" name="avatar_file" type="file"></div>
<div class="row">
<div class="col-md-9">
<div class="avatar-wrapper"></div>
</div>
<div class="col-md-3">
<div class="avatar-preview preview-lg" id="imageHead"></div>
<!--<div class="avatar-preview preview-md"></div>
<div class="avatar-preview preview-sm"></div>-->
</div>
</div>
<div class="row avatar-btns">
<div class="col-md-4">
<div class="btn-group">
<button class="btn btn-danger fa fa-undo" data-method="rotate" data-option="-90" type="button" title="Rotate -90 degrees"> 向左旋转</button>
</div>
<div class="btn-group">
<button class="btn btn-danger fa fa-repeat" data-method="rotate" data-option="90" type="button" title="Rotate 90 degrees"> 向右旋转</button>
</div>
</div>
<div class="col-md-5" style="text-align: right;">
<button class="btn btn-danger fa fa-arrows" data-method="setDragMode" data-option="move" type="button" title="移动">
<span class="docs-tooltip" data-toggle="tooltip" title="" data-original-title="$().cropper("setDragMode", "move")">
</span>
</button>
<button type="button" class="btn btn-danger fa fa-search-plus" data-method="zoom" data-option="0.1" title="放大图片">
<span class="docs-tooltip" data-toggle="tooltip" title="" data-original-title="$().cropper("zoom", 0.1)">
<!--<span class="fa fa-search-plus"></span>-->
</span>
</button>
<button type="button" class="btn btn-danger fa fa-search-minus" data-method="zoom" data-option="-0.1" title="缩小图片">
<span class="docs-tooltip" data-toggle="tooltip" title="" data-original-title="$().cropper("zoom", -0.1)">
<!--<span class="fa fa-search-minus"></span>-->
</span>
</button>
<button type="button" class="btn btn-danger fa fa-refresh" data-method="reset" title="重置图片">
<span class="docs-tooltip" data-toggle="tooltip" title="" data-original-title="$().cropper("reset")" aria-describedby="tooltip866214">
</button>
</div>
<div class="col-md-3">
<button class="btn btn-danger btn-block avatar-save fa fa-save" type="button" data-dismiss="modal"> 保存修改</button>
</div>
</div>
</div>
</div>
</form>
</div>
</div>
</div>
<div class="loading" aria-label="Loading" role="img" tabindex="-1"></div>
<script src="head/html2canvas.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
//做个下简易的验证 大小 格式
$('#avatarInput').on('change', function(e) {
var filemaxsize = 1024 * 5;//5M
var target = $(e.target);
var Size = target[0].files[0].size / 1024;
if(Size > filemaxsize) {
alert('图片过大，请重新选择!');
$(".avatar-wrapper").childre().remove;
return false;
}
if(!this.files[0].type.match(/image.*/)) {
alert('请选择正确的图片!')
} else {
var filename = document.querySelector("#avatar-name");
var texts = document.querySelector("#avatarInput").value;
var teststr = texts; //你这里的路径写错了
testend = teststr.match(/[^\\]+\.[^\(]+/i); //直接完整文件名的
filename.innerHTML = testend;
}
});
$(".avatar-save").on("click", function() {
var img_lg = document.getElementById('imageHead');
// 截图小的显示框内的内容
html2canvas(img_lg, {
allowTaint: true,
taintTest: false,
onrendered: function(canvas) {
canvas.id = "mycanvas";
//生成base64图片数据
var dataUrl = canvas.toDataURL("image/jpeg");
var newImg = document.createElement("img");
newImg.src = dataUrl;
imagesAjax(dataUrl)
}
});
})
function imagesAjax(src) {
var data = {};
data.img = src;
data.jid = $('#jid').val();
$.ajax({
url: "upload-logo.php",
data: data,
type: "POST",
dataType: 'json',
success: function(re) {
if(re.status == '1') {
$('.user_pic img').attr('src',src );
}
}
});
}
</script>
</body>
</html>
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