SpringBoot使用kaptcha验证码

1. 1.引入kaptcha所需要的jar包

4. com.github.penggle

5. kaptcha

6. 2.3.2

9. 2.配置kapcha

11. @Configuration

12. public class CaptchaConfig {

13. @Bean(name="captchaProducer")

14. public DefaultKaptcha getKaptchaBean(){

15. DefaultKaptcha defaultKaptcha=new DefaultKaptcha();

16. Properties properties=new Properties();

17. properties.setProperty("kaptcha.border", "yes");

18. properties.setProperty("kaptcha.border.color", "105,179,90");

19. properties.setProperty("kaptcha.textproducer.font.color", "blue");

20. properties.setProperty("kaptcha.image.width", "125");

21. properties.setProperty("kaptcha.image.height", "45");

22. properties.setProperty("kaptcha.session.key", "code");

23. properties.setProperty("kaptcha.textproducer.char.length", "4");

24. properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");

25. Config config=new Config(properties);

26. defaultKaptcha.setConfig(config);

27. return defaultKaptcha;

28. }

29. }

31. 3.Controller中这样使用

33. @RequestMapping(value = "/captcha-image")

34. public ModelAndView getKaptchaImage(HttpServletRequest request,

35. HttpServletResponse response) throws Exception {

36. response.setDateHeader("Expires", 0);

37. response.setHeader("Cache-Control",

38. "no-store, no-cache, must-revalidate");

39. response.addHeader("Cache-Control", "post-check=0, pre-check=0");

40. response.setHeader("Pragma", "no-cache");

41. response.setContentType("image/jpeg");

42. String capText = captchaProducer.createText();

43. System.out.println("capText: " + capText);

44. try {

45. String uuid=UUIDUtils.getUUID32().trim().toString();

46. redisTemplate.opsForValue().set(uuid, capText,60*5,TimeUnit.SECONDS);

47. Cookie cookie = new Cookie("captchaCode",uuid);

48. response.addCookie(cookie);

49. } catch (Exception e) {

50. e.printStackTrace();

51. }

52. BufferedImage bi = captchaProducer.createImage(capText);

53. ServletOutputStream out = response.getOutputStream();

54. ImageIO.write(bi, "jpg", out);

55. try {

56. out.flush();

57. } finally {

58. out.close();

59. }

60. return null;

61. }

63. 4.前台这样用

65. 

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