前端插件——头像截图上传插件的使用（带后台）

效果图：实现上传头像，右边是预览，有三个大小，可以对头像进行裁剪

HTML：

toParentData 和 img 返回的是图片裁剪后的base64编码。其中toParentData用于业务需求，可以忽略。

<!DOCTYPE html>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<c:set var="BASE" value="${pageContext.request.contextPath}"/>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%> 
    <meta charset="UTF-8">
   <title>头像编辑上传</title>
    <link rel="stylesheet" href="${BASE}/www/css/userinfo/headImg_style.css" type="text/css" />

    <!-- end -->
   <script>var BASE = "${BASE}";</script>    
    </head>
    
<body>
<script type="text/javascript" src="${BASE}/www/js/jquery/jquery-1.11.1.min.js"></script> 
<script type="text/javascript" src="${BASE}/www/js/userinfo/headImg_cropbox.js"></script>
<div class="container">
  <div class="imageBox">
    <div class="thumbBox"></div>
    <div class="spinner" style="display: none">Loading...</div>
  </div>
  <div class="action"> 
    <!-- <input type="file" >-->
    <div class="new-contentarea tc"> <a href="javascript:void(0)" class="upload-img">
      <label for="upload-file">上传图像</label>
      </a>
      <input type="file" class="" name="upload-file" id="upload-file" />
    </div>
    <input type="button" id="btnCrop"  class="Btnsty_peyton" value="裁切">
    <input type="button" id="btnZoomIn" class="Btnsty_peyton" value="+"  >
    <input type="button" id="btnZoomOut" class="Btnsty_peyton" value="-" >
  </div>
  <div class="cropped"></div>
</div>
<script type="text/javascript">
var toParentData ='';
$(window).load(function() {
    var options =
    {
        thumbBox: '.thumbBox',
        spinner: '.spinner',
        imgSrc: ''
    }
    var cropper = $('.imageBox').cropbox(options);
    $('#upload-file').on('change', function(){
        var reader = new FileReader();
        reader.onload = function(e) {
            options.imgSrc = e.target.result;
            cropper = $('.imageBox').cropbox(options);
        }
        reader.readAsDataURL(this.files[0]);
        this.files = [];
    })
    $('#btnCrop').on('click', function(){
        var img = cropper.getDataURL();
        toParentData = cropper.getDataURL();
        $('.cropped').html('');
        $('.cropped').append('<img src="'+img+'" align="absmiddle" style="width:64px;margin-top:4px;border-radius:64px;box-shadow:0px 0px 12px #7E7E7E;" ><p>64px*64px</p>');
        $('.cropped').append('<img src="'+img+'" align="absmiddle" style="width:128px;margin-top:4px;border-radius:128px;box-shadow:0px 0px 12px #7E7E7E;"><p>128px*128px</p>');
        $('.cropped').append('<img src="'+img+'" align="absmiddle" style="width:180px;margin-top:4px;border-radius:180px;box-shadow:0px 0px 12px #7E7E7E;"><p>180px*180px</p>');
    })
    $('#btnZoomIn').on('click', function(){
        cropper.zoomIn();
    })
    $('#btnZoomOut').on('click', function(){
        cropper.zoomOut();
    })
});

    function getBase64(){
        return toParentData;
    }
</script>

</body>
</html>

CSS代码

@charset "utf-8";
.container {
    width: 400px;
    margin: 40px auto 0 auto;
    position: relative;
    font-family: 微软雅黑;
    font-size: 12px;
}
.container p {
    line-height: 12px;
    line-height: 0px;
    height: 0px;
    margin: 10px;
    color: #bbb
}
.action {
    width: 400px;
    height: 30px;
    margin: 10px 0;
}
.cropped {
    position: absolute;
    right: -230px;
    top: 0;
    width: 200px;
    border: 1px #ddd solid;
    height: 460px;
    padding: 4px;
    box-shadow: 0px 0px 12px #ddd;
    text-align: center;
}
.imageBox {
    position: relative;
    height: 400px;
    width: 400px;
    border: 1px solid #aaa;
    background: #fff;
    overflow: hidden;
    background-repeat: no-repeat;
    cursor: move;
    box-shadow: 4px 4px 12px #B0B0B0; 
}
.imageBox .thumbBox {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    margin-top: -100px;
    margin-left: -100px;
    box-sizing: border-box;
    border: 1px solid rgb(102, 102, 102);
    box-shadow: 0 0 0 1000px rgba(0, 0, 0, 0.5);
    background: none repeat scroll 0% 0% transparent;
}
.imageBox .spinner {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    text-align: center;
    line-height: 400px;
    background: rgba(0,0,0,0.7);
}
.Btnsty_peyton{ float: right;
   width: 66px;
  display: inline-block;
  margin-bottom: 10px;
  height: 57px;
  line-height: 57px;
  font-size: 20px;
  color: #FFFFFF;
  margin:0px 2px;
  background-color: #f38e81;
  border-radius: 3px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0px 0px 5px #B0B0B0;
  border: 0px #fff solid;}
/*选择文件上传*/
.new-contentarea {
    width: 165px;
    overflow:hidden;
    margin: 0 auto;
    position:relative;float:left;
}
.new-contentarea label {
    width:100%;
    height:100%;
    display:block;
}
.new-contentarea input[type=file] {
    width:188px;
    height:60px;
    background:#333;
    margin: 0 auto;
    position:absolute;
    right:50%;
    margin-right:-94px;
    top:0;
    right/*\**/:0px\9;
    margin-right/*\**/:0px\9;
    width/*\**/:10px\9;
    opacity:0;
    filter:alpha(opacity=0);
    z-index:2;
}
a.upload-img{
    width:165px;
    display: inline-block;
    margin-bottom: 10px;
    height:57px;
    line-height: 57px;
    font-size: 20px;
    color: #FFFFFF;
    background-color: #f38e81;
    border-radius: 3px;
    text-decoration:none;
    cursor:pointer;
    border: 0px #fff solid;
    box-shadow: 0px 0px 5px #B0B0B0;
}
a.upload-img:hover{
    background-color: #ec7e70;
}

.tc{text-align:center;}
/*www.jq22.com*/

View Code