flex上传图片到java服务器

今天弄flex上传图片到java，现在弄成功，中间也经常一点小波折，现记录一下。重点在java侧的实现。

flex侧：文件上载到在url参数中传递的URL。该URL必须是配置为接受上载的服务器脚本。Flash Player使用HTTP POST方法上载文件。处理上载的服务器脚本应收到包含下列元素的POST请求：

Content-Type，属于multipart/form-data

Content-Disposition,其name属性默认情况下设置为“Filedata”，filename属性设置为原始文件的名称

文件的二进制内容

java侧，用spring MVC实现，接收到图片，先存储到本地，然后上传到ftp，上代码：

 

@Controller
public class FlashController extends BaseController{

    // 限制文件的上传大小
    private int maxPostSize = 100 * 1024 * 1024;
    public static String p_w_picpathPath = null;
    public static String p_w_picpathCdnPath = null;

    @SuppressWarnings("unchecked")
    @RequestMapping("/uploadImage")
    @ResponseBody
    public String uploadImage(HttpServletRequest request, HttpServletResponse response) {
        try {
            if(p_w_picpathPath == null) {
                p_w_picpathPath = Config.getConfig("message.p_w_picpath.path");
            }
            if(p_w_picpathCdnPath == null) {
                p_w_picpathCdnPath = Config.getConfig("message.p_w_picpath.cdn.dir");
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            LoggerUtil.error("读取聊天图片的存储地址出错",e);
        }
        String productId = request.getParameter("productId");
        if(StringUtils.isBlank(productId)) {
            productId = "default";
        }
        LoggerUtil.debug("收到flash存储聊天图片的请求，productId:" + productId);
        LoggerUtil.outInInfo("收到flash存储聊天图片的请求，productId:" + productId);

        // We use the FileUpload package provided by Apache to process the request.
        DiskFileItemFactory factory = new DiskFileItemFactory();
        factory.setSizeThreshold(4096);
        ServletFileUpload upload = new ServletFileUpload(factory);
        upload.setSizeMax(maxPostSize);
        String fileName = null;
        try {
            request.setCharacterEncoding("UTF-8");
            List fileItems = upload.parseRequest(request);
            Iterator iter = fileItems.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();
                if (!item.isFormField()) {
                    fileName = item.getName();
                    //转换文件名
                    String fileType = fileName.substring(fileName.lastIndexOf("."));
                    fileName = ImageUtils.getCreateImageFileName("","","",fileType);
                    item.write(new File(p_w_picpathPath + fileName));
                }
            }
        } catch (FileUploadException e) {
            LoggerUtil.error("[在线客服]用户上传图片失败", e);
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
              LoggerUtil.error("[在线客服]用户上传图片失败", e);
        } catch (IOException e) {
            // TODO Auto-generated catch block
              LoggerUtil.error("[在线客服]用户上传图片失败", e);
        } catch (Exception e) {
            // TODO Auto-generated catch block
              LoggerUtil.error("[在线客服]用户上传图片失败", e);
        }

        //把图片上传到CDN
        FTPUtils ftpUtils = new FTPUtils("config");
        try {
            boolean result = ftpUtils.connect();
            if(!result) {
                LoggerUtil.alarmInfo("连接FTP服务器失败");
                return "error";
            }
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            LoggerUtil.error("连接FTP服务器失败", e1);
            return "error";
        }

        String ftpName = p_w_picpathCdnPath + productId + "/" + DateUtil.formatDate(new Date(),"yyyyMM") + "/" + fileName;
        String srcImagePath = p_w_picpathPath+fileName;
        int uploadResult = Im4JavaUtils.uploadJPGImageByIm4Java(ftpUtils, srcImagePath, ftpName, ImageUtils.IMAGE_SIZE_TYPE_ORIG);
        LoggerUtil.debug("上传结果：" + uploadResult);
        if(uploadResult != FTPUtils.UPLOADSTATUS_UPLOAD_FILE_SUCESS) {
            return "error";
        }
        String result = ftpUtils.getFtpHttpUrl()+ productId + "/" + DateUtil.formatDate(new Date(),"yyyyMM") + "/" + fileName;
        LoggerUtil.debug(result);
        return result;
    }
}

附上两个很好的参考网址：

http://www.adobe.com/devnet/flex/articles/file_upload.html

http://blog.csdn.net/duanjingyu/article/details/5539690