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This article mainly introduces how to use kaptcha in SpringBoot to achieve Captcha related knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe everyone will have some gains after reading this article on how to use kaptcha in SpringBoot to achieve Captcha, let's take a look at it together.

1. kaptcha related introduction

Kaptcha is a SimpleCaptcha based Captcha open source project.

2. integration scheme

① Configuration dependencies in pom.xml

com.github.penggle kaptcha 2.3.2

② Configure Captcha Kaptcha related settings

@Configurationpublic class kaptchaConfig { @Bean(name="captchaProducer") public DefaultKaptcha getKaptchaBean(){ DefaultKaptcha defaultKaptcha=new DefaultKaptcha(); Properties properties=new Properties(); properties.setProperty("kaptcha.border", "yes"); properties.setProperty("kaptcha.border.color", "105,179,90"); properties.setProperty("kaptcha.textproducer.font.color", "blue"); properties.setProperty("kaptcha.image.width", "125"); properties.setProperty("kaptcha.image.height", "45"); properties.setProperty("kaptcha.session.key", "code"); properties.setProperty("kaptcha.textproducer.char.length", "4"); properties.setProperty("kaptcha.textproducer.font.names", "Arial, Regular Style, Microsoft Elegant Black"); Config config=new Config(properties); defaultKaptcha.setConfig(config); return defaultKaptcha; }}

or

Create myKaptcher.xml file under resources

yes 105,179,90 blue 100 50 27 code 4 Regular font, Microsoft elegant black 23456789ABCEFGHJKMNOPQRSTUVWXYZ com.google.code.kaptcha.impl.WaterRipple black com.google.code.kaptcha.impl.NoNoise 185,56,213 white 3

Then load the configuration in the startup class Application

@EnableTransactionManagement//Start annotation transaction management, equivalent to @SpringBootApplication@EnableScheduling//Start annotation timed task @MapperScan(basePackages = "com.shawn.mapper")@ImportResource(locations={"classpath:mykaptcha.xml"})public class Application extends SpringBootServletInitializer { public void static main(String[] args) throws Exception {void SpringApplication.run(Application.class, args); }}

Both configurations are available in springboot;

③KaptchaController

@CommonsLog@Controllerpublic class KaptchaController extends BaseController { @Autowired private Producer captchaProducer; @GetMapping("/getKaptchaImage") public void getKaptchaImage() throws Exception { response.setDateHeader("Expires", 0); // Set standard HTTP/1.1 no-cache headers. response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate"); // Set IE extended HTTP/1.1 no-cache headers (use addHeader). response.addHeader("Cache-Control", "post-check=0, pre-check=0"); // Set standard HTTP/1.0 no-cache header. response.setHeader("Pragma", "no-cache"); // return a jpeg response.setContentType("image/jpeg"); // create the text for the image String capText = captchaProducer.createText(); // store the text in the session //request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText); //Save Captcha to session session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText); log.info(capText); // create the image with the text BufferedImage bi = captchaProducer.createImage(capText); ServletOutputStream out = response.getOutputStream(); // write the data out ImageIO.write(bi, "jpg", out); try { out.flush(); } finally { out.close(); } }} About "How to use kaptcha to implement Captcha in SpringBoot" The content of this article is introduced here, thank you for reading! I believe everyone has a certain understanding of "how to use kaptcha to implement Captcha in SpringBoot." If you want to learn more, please pay attention to the industry information channel.

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