上传图片 带图片预览功能

设置预览块的css

<style type="text/css"> #uploadPreview { width: 220px; height: 138px; background-position: center center; background-size: cover; border: 4px solid #fff; -webkit-box-shadow: 0 0 1px 1px rgba(0, 0, 0, .3); display: inline-block; } </style>

预览块js

<script type="text/javascript"> $(function(){ $("#uploadImage").on("change", function(){ // Get a reference to the fileList var files = !!this.files ? this.files : []; // If no files were selected, or no FileReader support, return if (!files.length || !window.FileReader) return; // Only proceed if the selected file is an image if (/^image/.test( files[0].type)){ // Create a new instance of the FileReader var reader = new FileReader(); // Read the local file as a DataURL reader.readAsDataURL(files[0]); // When loaded, set image data as background of div reader.onloadend = function(){ //$("#uploadPreview").css("background-image", "url("+this.result+")"); $("#uploadPreview").attr("src", this.result); } } }); }); </script>

jsp代码

<img src="" alt="" id="uploadPreview"/>
<input type="text" class="cover-bg" value="选择文件"/>
<input id="uploadImage" class="uploadInput" type="file" name="file"/>