识别图片数字-验证码

 
 


 
 
 
 

 


 

 
 
 

 java 通过 JNI 调用开源的OCR 来识别验证码， 这样不要通过调用exe 生成临时文件来获得验证码

 

 

 //演示程序

 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
   throws ServletException, IOException {
  
  String url = req.getParameter("j_imgurl");
  InputStream instream = InitEnv.class.getResourceAsStream(InitEnv.CERTPATH);
  ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
  String protocol = "http";
  byte[] b = null;
  try {
   if(url.startsWith("https")){
       protocol = "https";
   }
   PicUtil.getPic(protocol,url,InitEnv.PORT, InitEnv.PWD, instream, outputStream);
   b = outputStream.toByteArray();
   ImageFilter imageFilter = new ImageFilter(new ByteArrayInputStream(b));
   outputStream.close();
   ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 
   ImageIOHelper.createImage(imageFilter.changeGrey(), byteArrayOutputStream);
   byte[] imgData = byteArrayOutputStream.toByteArray();
   byteArrayOutputStream.close();
   
   if(imgData == null || imgData.length <=0){
        return ;
   }

   TesseractEntity tesseractEntity =new TesseractEntity();
   tesseractEntity.setImgByte(imgData);
   tesseractEntity.setIdentifyingCode("-1");
   tesseractEntity.setLength(imgData.length);
   tesseractEntity.setPath(InitEnv.unZipOcrPath);
   tesseractEntity.setLang_option("eng");
   

   //调用JNI 获得图片文字
   String result = AnalysePictureEx.analysePicEx(tesseractEntity);
   String uuid = UUID.randomUUID().toString();
   ImageData.imags.put(uuid, b );
   

   //获得验证码
   req.setAttribute("identifyingCode", tesseractEntity.getIdentifyingCode());
   req.setAttribute("uuid", uuid);
         RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/result.jsp");
         requestDispatcher.forward(req, resp);
   
  } catch (Exception e) {
     e.printStackTrace();
  }
 }  
  
     
  
 

1、 iOCR.war放到 tomcat 下。

 

2、访问http://127.0.0.1:8080/iOCR/

 

3、输入图片的URL地址。

 

4、得到图片数字

 

注： 在XP下可以通过