JQuery上传插件Uploadify

一：官网

http://www.uploadify.com/

二：引用

<link href="plug-in/uploadify3.2.1/uploadify.css" rel="stylesheet" />
<script type="text/javascript" src="plug-in/uploadify3.2.1/jquery.uploadify.min.js"></script>

三：例子

（1）前台页面

<tr>
        <td align="right">
            <label class="Validform_label"> 主题图: </label>
        </td>
        <td class="value">
             <input id="subjectMap" name="subjectMap" type="hidden" datatype="*" />
             <table>
                <tr>
                    <td>
                        <input type="file" name="upload_org_code" id="upload_org_code"/>
                    </td>
                    <td>
                       <img  id="upload_org_code_img" src="" width="216" height="135">
                       <a  id="del" style="display: none;" href="#" onclick="del()">删除</a>
                    </td>
                </tr>
             </table>
             <span class="Validform_checktip">建议尺寸：720*360</span>
        </td>
</tr>

（2）上传JS

setTimeout(function(){
         $("#upload_org_code").uploadify({
                    'height'        : 27,
                    'width'         : 80,
                    'buttonText'    : '图片上传',
                    'swf'           : 'plug-in/uploadify3.2.1/uploadify.swf',
                    'uploader'      : 'rouletteController.do?objUpload',
                    'auto'          : true,
                    'multi'         : false,
                    'removeCompleted':true,
                    'removeTimeout' : 1,
                    'cancelImg'     : 'plug-in/uploadify3.2.1/uploadify-cancel.png',
                    'fileTypeExts'  : '*.jpg;*.jpge;*.gif;*.png',
                    'fileSizeLimit' : '2MB',
                    'onUploadSuccess':function(file,data,response){
                        var json = eval('(' + data + ')');
                        var url=json.attributes.visiturl+json.attributes.fileName;
                        $("#upload_org_code_img").attr("src",url);
                        $("#subjectMap").val(json.attributes.fileName);
                        $("#del").attr("style","display: block;");
                    },
                    //加上此句会重写onSelectError方法【需要重写的事件】
                    'overrideEvents': ['onSelectError', 'onDialogClose'],
                    //返回一个错误，选择文件的时候触发
                    'onSelectError':function(file, errorCode, errorMsg){
                        switch(errorCode) {
                            case -110:
                                alert("文件 ["+file.name+"] 大小超出系统限制的" +
　　　　　　　　　　　　　　　　　　　　jQuery('#upload_org_code').uploadify('settings', 'fileSizeLimit') + "大小！");
                                break;
                            case -120:
                                alert("文件 ["+file.name+"] 大小异常！");
                                break;
                            case -130:
                                alert("文件 ["+file.name+"] 类型不正确！");
                                break;
                        }
                    },
                });
           },10)

（3）上传后台代码

/****
     * 图片上传
     **/
    @RequestMapping(params = "objUpload")
    @ResponseBody
    public AjaxJson objUpload(HttpServletRequest request) throws Exception {
        AjaxJson j = new AjaxJson();
        Map<String, Object> attributes = new HashMap<String, Object>();
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
        String tomcaturl = PropertiesConfig.getStringConfig("tomcaturl");
        String roulette_sub_url = PropertiesConfig.getStringConfig("roulette_sub_url");
        String visiturl = PropertiesConfig.getStringConfig("visiturl");
        // 创建文件夹
        File file = new File(tomcaturl+roulette_sub_url);
        if (!file.exists()) {
            file.mkdirs();
        }
        String fileName = null;
        //String path = null;
        for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
            // 上传文件名
            MultipartFile mf = entity.getValue();
            fileName = mf.getOriginalFilename();
            String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1)
                    .toLowerCase();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            String newFileName = "roulette_" + df.format(new Date()) +"_bak"+ "." + fileExt;
            File uploadFile = new File(tomcaturl+roulette_sub_url+newFileName);
            try {
                FileCopyUtils.copy(mf.getBytes(), uploadFile);
                fileName = roulette_sub_url+newFileName;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        attributes.put("visiturl", visiturl);
        attributes.put("fileName", fileName);
        j.setAttributes(attributes);
        return j;
    }