springboot 集成 kaptcha 验证码简单实例

言曌 2018年01月31日15:10:05 6 3475 views

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本文介绍 SpringBoot 使用 kaptcha 验证码，其实和 SpringBoot 没啥关系，主要是 kaptcha 的使用。

一、准备工作

一个 SpringBoot 项目或者 SpringMVC 项目。

引入依赖

<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>

二、加入 kaptcha 配置

方法一、

新建 CaptchaConfig.java

package com.liuyanzhao.chuyun.config;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Properties;
/**
* @author 言曌
* @date 2018/1/30 下午11:31
*/
@Configuration
public class CaptchaConfig {
@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", "宋体,楷体,微软雅黑");
Config config=new Config(properties);
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}

方法二、

1、在resources中创建一个xxx.xml文件如：

mykaptcha.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="captchaProducer" class="com.google.code.kaptcha.impl.DefaultKaptcha">
<property name="config">
<bean class="com.google.code.kaptcha.util.Config">
<constructor-arg type="java.util.Properties">
<props>
<prop key = "kaptcha.border ">yes</prop>
<prop key="kaptcha.border.color">105,179,90</prop>
<prop key="kaptcha.textproducer.font.color">blue</prop>
<prop key="kaptcha.image.width">100</prop>
<prop key="kaptcha.image.height">50</prop>
<prop key="kaptcha.textproducer.font.size">27</prop>
<prop key="kaptcha.session.key">code</prop>
<prop key="kaptcha.textproducer.char.length">4</prop>
<prop key="kaptcha.textproducer.font.names">宋体,楷体,微软雅黑</prop>
<prop key="kaptcha.textproducer.char.string">0123456789ABCEFGHIJKLMNOPQRSTUVWXYZ</prop>
<prop key="kaptcha.obscurificator.impl">com.google.code.kaptcha.impl.WaterRipple</prop>
<prop key="kaptcha.noise.color">black</prop>
<prop key="kaptcha.noise.impl">com.google.code.kaptcha.impl.DefaultNoise</prop>
<prop key="kaptcha.background.clear.from">185,56,213</prop>
<prop key="kaptcha.background.clear.to">white</prop>
<prop key="kaptcha.textproducer.char.space">3</prop>
</props>
</constructor-arg>
</bean>
</property>
</bean>
</beans>

2、在springboot启动类上引入这

@SpringBootApplication
@ImportResource(locations={"classpath:mykaptcha.xml"})
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

三、显示验证码

TestController.java

package com.liuyanzhao.chuyun.controller;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
/**
* @author 言曌
* @date 2018/1/30 下午11:37
*/
@Controller
public class TestController {
@Autowired
DefaultKaptcha defaultKaptcha;
/**
* 显示验证码
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("/defaultKaptcha")
public void defaultKaptcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
byte[] captchaChallengeAsJpeg = null;
ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
try {
//生产验证码字符串并保存到session中
String createText = defaultKaptcha.createText();
request.getSession().setAttribute("verifyCode", createText);
//使用生产的验证码字符串返回一个BufferedImage对象并转为byte写入到byte数组中
BufferedImage challenge = defaultKaptcha.createImage(createText);
ImageIO.write(challenge, "jpg", jpegOutputStream);
} catch (IllegalArgumentException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
//定义response输出类型为image/jpeg类型，使用response输出流输出图片的byte数组
captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
ServletOutputStream responseOutputStream =
response.getOutputStream();
responseOutputStream.write(captchaChallengeAsJpeg);
responseOutputStream.flush();
responseOutputStream.close();
}
/**
* 映射 test.html
* @return
*/
@GetMapping("/test")
public String test() {
return "/test";
}
/**
* 验证码输入验证
* @param model
* @param session
* @param verifyCode
* @return
*/
@GetMapping("/verifyCode")
public String imgverifyControllerDefaultKaptcha(Model model, HttpSession session, String verifyCode) {
String captchaId = (String) session.getAttribute("verifyCode");
System.out.println("验证码是：" + captchaId);
System.out.println("用户输入的是：" + verifyCode);
if (!captchaId.equals(verifyCode)) {
System.out.println("输入错误");
model.addAttribute("info", "错误的验证码");
} else {
System.out.println("输入正确");
model.addAttribute("info", "正确");
}
return "/test";
}
}

test.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>kaptcha 测试</title>
</head>
<body>
<h1 th:text="${info}"/>
<div>
<img alt="验证码" onclick="this.src='/defaultKaptcha?d='+new Date()*1" src="/defaultKaptcha"/>
</div>
<form action="/verifyCode">
<input type="text" name="verifyCode"/>
<input type="submit" value="提交"/>
</form>
</body>
</html>