Shulou(Shulou.com)06/01 Report--

Editor to share with you how Java to achieve sliding CAPTCHA, I hope you will learn something after reading this article, let's discuss it together!

Function: java to achieve sliding CAPTCHA

The project is based on springboot,maven

Development tools: using idea

1. Effect demonstration

two。 The backend code control layer @ Controllerpublic class SliderCodeController {@ Autowired ResourceLoader resourceLoader; @ Autowired private FileUtil fileUtil; / / sets the horizontal axis location cache public static Cache

Cacheg = CacheBuilder.newBuilder () .expireAfterWrite (60, TimeUnit.SECONDS) .maximumSize (666666) .build (); @ GetMapping @ RequestMapping ("index") public String test (HttpServletRequest request, Model model) throws IOException {return "index";} @ GetMapping @ RequestMapping ("getImg") public @ ResponseBody Map

GetPic (HttpServletRequest request) throws IOException {try {File targetFile = fileUtil.getFile ("target"); File tempImgFile = fileUtil.getFile ("temp"); Map

ResultMap = VerifyImageUtil.pictureTemplatesCut (tempImgFile, targetFile); / / generate the serial number. Use the timestamp instead of String lno = Calendar.getInstance (). GetTimeInMillis () + "; cacheg.put (lno, Integer.valueOf (resultMap.get (" xWidth ") +")); resultMap.put ("capcode", lno) / / remove Abscissa to the front end resultMap.remove ("xWidth"); return resultMap;} catch (Exception e) {e.printStackTrace (); return null;}} @ GetMapping @ RequestMapping ("checkImgCode") public @ ResponseBody Map

Checkcapcode (@ RequestParam ("xpos") int xpos, @ RequestParam ("capcode") String capcode, HttpServletRequest request) throws IOException {Map

Result = new HashMap

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.