1. 1.引入kaptcha所需要的jar包
  3. <dependency>
  4. <groupId>com.github.penggle</groupId>
  5. <artifactId>kaptcha</artifactId>
  6. <version>2.3.2</version>
  7. </dependency>
  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. <img style="height:22px;" id="codeImg" alt="点击更换"     title="点击更换" src="code/captcha-image" />