SpringMVC上传图片代码

来源：互联网发布：淘宝远程安装软件编辑：程序博客网时间：2024/06/13 06:24

// 上传图纸

   @RequestMapping(value = "/uploadPaper.do")
   public @ResponseBody
   Object uploadPoster(HttpServletRequest request, HttpServletResponse response)
           throws Exception {
       HttpJson httpJson = new HttpJson();
       System.out.println("开始上传照片");
       String customerId = request.getParameter("computecustomerId");
       String ret_fileName = null;// 返回给前端已修改的图片名称
       String base64Img = request.getParameter("base64");
       // 临时文件路径
       // String dirTemp = "\\upload\\temp";
       String dirTemp = "\\upload";
       String uploadImg = "\\upload";

       try {
           request.setCharacterEncoding("UTF-8");
       } catch (UnsupportedEncodingException e1) {
           // TODO Auto-generated catch block
           e1.printStackTrace();
           httpJson.setMsg("上传图片失败");
           httpJson.setSuccess(false);
           return httpJson;
       }
       // response.setContentType("text/html; charset=UTF-8");
       // PrintWriter out = response.getWriter();

       String realPath = request.getServletContext().getRealPath("");
       String tempPath = request.getServletContext().getRealPath("/")
               + dirTemp;
       File file_normer = new File(realPath + uploadImg+"/"+customerId);
       if (!file_normer.exists()) {
           file_normer.mkdirs();
       }
       // 用于设置图片过大，存入临时文件
       DiskFileItemFactory factory = new DiskFileItemFactory();
       factory.setSizeThreshold(20 * 1024 * 1024); // 设定使用内存超过5M时，将产生临时文件并存储于临时目录中。
       factory.setRepository(new File(tempPath)); // 设定存储临时文件的目录。

       ServletFileUpload upload = new ServletFileUpload(factory);
       upload.setHeaderEncoding("UTF-8");
       if (base64Img == null) // 图像数据为空
           return false;
       base64Img = base64Img.replaceAll("data:image/jpeg;base64,", "");
       BASE64Decoder decoder = new BASE64Decoder();
       try {
           // Base64解码
           byte[] b = decoder.decodeBuffer(base64Img);
           for (int i = 0; i < b.length; ++i) {
               if (b[i] < 0) {// 调整异常数据
                   b[i] += 256;
               }
           }
           // 生成jpeg图片
           ret_fileName = new String((DateHandler.dateToStr(new Date(),"yyyyMMddhhmmss")+".jpg").getBytes("gb2312"), "ISO8859-1" ) ;
           File file = new File(realPath + uploadImg+"/"+ customerId + "/" + ret_fileName);
           OutputStream out = new FileOutputStream(file);
           out.write(b);
           out.flush();
           out.close();
       } catch (Exception e) {
           e.printStackTrace();
       }

       String image_url = request.getSession().getServletContext()   .getContextPath()+ "/upload/" + customerId + "/" + ret_fileName;
       // 将已修改的图片url对应的id返回前端
       httpJson.setMsg("上传图片成功");
       httpJson.setSuccess(true);
       httpJson.setObj(image_url);
       return JSONObject.fromObject(httpJson);
   }

0 0