/*
     * 上传文件
     */
    public String uploadFile(File upload, String uploadFileName,
            String directory) {
        String path = "upload";

        String filePath = "";
        try {

            HttpServletRequest request = ServletActionContext.getRequest();

            String fileName = uploadFileName;

            // 获取物理路径
            String sPath = request.getRealPath(path+File.separator + directory)+File.separator;
            // 获取网络地址
            filePath = path + "/" + directory
                    + "/" + fileName;

            String outputFileName = sPath + fileName;

            File outputPathFile = new File(sPath);
            if (!outputPathFile.exists()) {
                outputPathFile.mkdirs();
            }

            // 保存文件
            File outputFile = new File(outputFileName);
            java.io.InputStream is = new FileInputStream(upload);
            java.io.OutputStream os = new java.io.FileOutputStream(outputFile);

            if (outputFile.exists())
                outputFile.delete();

            byte buffer[] = new byte[8192];
            int count = 0;
            while ((count = is.read(buffer)) > 0) {
                os.write(buffer, 0, count);
            }

            os.close();
            is.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return filePath;
    }

------解决方案--------------------

  String filePath = "images/"+fileName;