Java——使用springboot2.0+kaptcha進行驗證碼校驗
阿新 • • 發佈：2018-12-21
pom檔案
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.captcha</groupId> <artifactId>captcha</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>captcha</name> <description>Captcha project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.0.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <!-- web層 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- 頁面渲染jar包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <!--kaptcha驗證碼生成器 --> <dependency> <groupId>com.github.axet</groupId> <artifactId>kaptcha</artifactId> <version>0.0.9</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
響應的R類
package com.captcha.demo; import java.util.List; public class R { private String retCode; private String retMsg; private Object retBean; private List<Object> retBeans; public String getRetCode() { return retCode; } public void setRetCode(String retCode) { this.retCode = retCode; } public String getRetMsg() { return retMsg; } public void setRetMsg(String retMsg) { this.retMsg = retMsg; } public Object getRetBean() { return retBean; } public void setRetBean(Object retBean) { this.retBean = retBean; } public List<Object> getRetBeans() { return retBeans; } public void setRetBeans(List<Object> retBeans) { this.retBeans = retBeans; } }
配置的檔案application.yml
spring:
thymeleaf:
prefix: classpath:/templates/
check-template-location: true
suffix: .html
encoding: UTF-8
mode: LEGACYHTML5
cache: falseh5頁面
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>登陸</title> </head> <body> <div class='loginDiv'> <h1 align="center">歡迎登陸</h1> <form action="userLogin" method="get"> <div > <label >驗證碼</label> <div > <input type="text" name="kaptcha" placeholder="請輸入驗證碼" autocomplete="off"> <img src="captcha.jpg" onclick="refresh(this)" > </div> </div> <div > <div > <button >立即提交</button> </div> </div> </form> </div> <script> function refresh(obj) { obj.src = "captcha.jpg?t=" + new Date().getMilliseconds(); } </script> </body> </html>
需注入的依賴類
package com.captcha.demo;
import java.util.Properties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
@Configuration
public class KaptchaConfig {
@Bean
public DefaultKaptcha defaultKaptcha(){
Properties properties = new Properties();
properties.setProperty("kaptcha.border","no");
properties.setProperty("kaptcha.textproducer.font.color","black");
properties.setProperty("kaptcha.textproducer.char.space","5");
Config config = new Config(properties);
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}最後是web層的Controller Demo
package com.captcha.demo;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.google.code.kaptcha.impl.DefaultKaptcha;
@Controller
public class CaptchDemo {
@Autowired
private DefaultKaptcha defaultKaptcha;
@RequestMapping("/captcha.jpg")
@ResponseBody
public R applyCheckCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
R r = new R();
response.setHeader("Cache-Control", "no-store, no-cache");
response.setContentType("image/jpeg");
// 生成文字驗證碼
String text = defaultKaptcha.createText();
// 生成圖片驗證碼
BufferedImage image = defaultKaptcha.createImage(text);
// 儲存到session
request.getSession().setAttribute("CHECK CODE", text);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(image, "jpg", out);
return r;
}
@ResponseBody
@RequestMapping(value = "/userLogin")
public String userLogin(HttpServletRequest request) {
String kaptcha = request.getParameter("kaptcha");
String s = request.getSession().getAttribute("CHECK CODE").toString();
if (StringUtils.isEmpty(kaptcha) || !s.equals(kaptcha)) {
return "failure";
}
return "success";
}
@RequestMapping(value = "/login")
public String login() {
return "/login";
}
}
以上就是使用springboot建立的驗證碼生成與驗證全過程，如果有什麼問題可在下面評論提出，謝謝！