java-上传图片

<div class="fitem">
　　<label style="width: 80px;"><b>图片上传:</b></label>
　　<input type="file" name="fileToUpload" id="fileToUpload" style="width:250px;margin-left: 5px;" /> 
　　<a href="javascript:void(0)" class="easyui-linkbutton c6" data-options="iconCls:'icon-ok'" onclick="return uploadFile()">上传</a>
</div>

function uploadFile() {
      var f=$("#fileToUpload").val();
        if(!/.(gif|jpg|jpeg|png|JPG|PNG)$/.test(f))
        {
            alert("图片类型必须是.(gif|jpg|jpeg|png|JPG|PNG)中的一种");
            return false;
        }
    var getTimestamp = new Date().getTime(); // 时间戳
    $.ajaxFileUpload({
        url : jum.getRootPath() + "/content/uploadPictureMgn.do?timer="
                + getTimestamp,
        secureuri : false,
        dataType: 'json',
        fileElementId : 'fileToUpload', // 文件选择框的id属性
        success : function(data) {
            if(data.success){
                $("#hidPicUrl").textbox('setValue', data.fileName);
                $("#img").attr("src", data.picRootUrl + "/" + data.fileName);
                $.messager.alert("发送结果", "上传成功！", "info");
                return true;
            }else{
                $.messager.alert("发送结果", "上传失败！", "info");
                return false;
            }
        },
        error : function(data) {
            $.messager.alert("发送结果", "上传异常失败", "info");
            return false;
        }
    });

    @RequestMapping(value="content/uploadPictureMgn.do", method=RequestMethod.POST)  
    public void upload(HttpServletRequest request, PrintWriter out) {
        Map<String, Object> resultMap = new HashMap<String, Object>();
        try {
            // 服务绝对路径
            MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
            //得到图片保存目录的真实路径
            String logoRealPathDir = SysConfigUtil.getConfigMsg("pictureMgUrl");
            //根据真实路径创建目录
            File logoSaveFile = new File(logoRealPathDir);
            if (!logoSaveFile.exists())
                logoSaveFile.mkdirs();
            //页面控件的文件流 
            MultipartFile multipartFile = multipartRequest
                    .getFile("fileToUpload");
            // 文件类型
            String fileType = multipartFile.getContentType().toLowerCase();
            // 获取文件的后缀
            String suffix = multipartFile.getOriginalFilename().substring(
                    multipartFile.getOriginalFilename().lastIndexOf("."));
            if (suffix.equals("")) {
                throw new IllegalArgumentException("文件无扩展名！");
            } else if (!(fileType.equalsIgnoreCase("image/gif")
                    || fileType.equalsIgnoreCase("image/jpg")
                    || fileType.equalsIgnoreCase("image/jpeg")
                    || fileType.equalsIgnoreCase("image/png"))) {
                throw new IllegalArgumentException("文件类型错误！");
            }

            //拼成完整的文件保存路径加文件
            String name = +System.currentTimeMillis() + suffix;
            String fileName = logoRealPathDir + File.separator + name;
            File file = new File(fileName);
            // String dataPath = file.getPath();
            multipartFile.transferTo(file);
            resultMap.put("fileName", name);
            resultMap.put("picRootUrl",
                    SysConfigUtil.getConfigMsg("picRootUrl"));
            resultMap.put("success", true);
        } catch (IllegalStateException e) {
            e.printStackTrace();
            resultMap.put("success", false);
        } catch (IOException e) {
            e.printStackTrace();
            resultMap.put("success", false);
        } catch (Exception e) {
            e.printStackTrace();
            resultMap.put("success", false);
        }
        
        JSONObject jsonObject = JSONObject.fromObject(resultMap);
        String jsonStr = jsonObject.toString();
        out.write(jsonStr);
        out.flush();
    }

 

}