文章目录
简介
Kaptcha 是一个可高度配置的实用验证码生成工具，可*配置的选项如：
- 验证码的字体
- 验证码字体的大小
- 验证码字体的字体颜色
- 验证码内容的范围(数字，字母，中文汉字！)
- 验证码图片的大小，边框，边框粗细，边框颜色
- 验证码的干扰线
- 验证码的样式(鱼眼样式、3D、普通模糊)
原文链接 （详细配置表）
准备
- 新建一个SpringBoot项目
- 导入包
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>
代码实现
1. KaptchaConfig
package com.zhx.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;
@Configuration
public class KaptchaConfig {
@Bean(name = "kaptcha")
public DefaultKaptcha getDefaultKaptcha() {
DefaultKaptcha kaptcha = new DefaultKaptcha();
Properties properties = new Properties();
// 图片边框
properties.setProperty("kaptcha.border", "yes");
// 边框颜色
properties.setProperty("kaptcha.border.color", "105,179,90");
// 字体颜色
properties.setProperty("kaptcha.textproducer.font.color", "red");
// 图片宽
properties.setProperty("kaptcha.image.width", "110");
// 图片高
properties.setProperty("kaptcha.image.height", "40");
// 字体大小
properties.setProperty("kaptcha.textproducer.font.size", "30");
// session key
properties.setProperty("kaptcha.session.key", "code");
// 验证码长度
properties.setProperty("kaptcha.textproducer.char.length", "4");
// 字体
properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
Config config = new Config(properties);
kaptcha.setConfig(config);
return kaptcha;
}
}
2. KaptchaController
KaptchaController.java
package com.zhx.controller;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
/**
* @author:ZhangHaiXia
* @Date: 2022/3/2
* @Description:
*/
@Controller
public class KaptchaController {
/**
* 验证码工具
*/
@Autowired
DefaultKaptcha kaptcha;
/**
* 返回首页
* @return
*/
@GetMapping(value = "/toLogin")
public String index() {
return "login";
}
@GetMapping("/getVerifyCode")
public void getVerifyCode(HttpServletRequest request, HttpServletResponse response) throws Exception {
byte[] verifyCode = null;
ByteArrayOutputStream tempOut = new ByteArrayOutputStream();
try {
// 将生成的验证码保存在session中
String text = kaptcha.createText();
request.getSession().setAttribute("rightCode", text);
BufferedImage bi = kaptcha.createImage(text);
//使用ImageIo将流写入到tempOut中
ImageIO.write(bi, "jpg", tempOut);
} catch (Exception e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
//将tempOut中的流转换为字节数组
verifyCode = tempOut.toByteArray();
//设置响应头
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
//响应回前端
ServletOutputStream out = response.getOutputStream();
out.write(verifyCode);
out.flush();
out.close();
}
/**
* 验证码校验工具
*/
@PostMapping(value = "/login")
public ModelAndView verifyCheck(HttpServletRequest request, HttpServletResponse response) {
ModelAndView model = new ModelAndView();
String rightCode = (String) request.getSession().getAttribute("rightCode");
String tryCode = request.getParameter("tryCode");
if (!rightCode.equals(tryCode)) {
model.addObject("info", "验证码错误,请再输一次!");
model.setViewName("login");
} else {
model.addObject("info", "登陆成功");
model.setViewName("index");
}
return model;
}
}
3. login.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head lang="en">
<meta charset="UTF-8">
<title>Insert title here</title>
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<style type="text/css">
body {
padding: 10px;
}
#text1,#text2 {
width: 100%;
}
#login{
width: 300px;
margin:0px auto;
padding-top: 60px;
}
#flushimg{
text-decoration: underline;
}
#butt{
width: 60%;
}
</style>
</head>
<body>
<div id="login">
<form action="/login" method="post">
<h2 align="center">L O G I N</h2><br/><br/>
<input type="text" name="userName" class="form-control" id="text1" required autofocus placeholder="-----请输入用户名-----"/><br/>
<input type="password" name="userName" class="form-control" id="text2" required placeholder="----请输入用户密码----"/><br/>
<div id="flushimg">
<img alt="验证码" onclick="this.src='/getVerifyCode'" src="/getVerifyCode" />
<a>看不清？点击图片刷新一下</a>
</div>
<input type="text" name="tryCode" class="form-control" required placeholder="-----请输入验证码-----" />
<h4 th:text="${info}" style="color: red"></h4>
<input type="checkbox" name="rememberMe"/>记住我<br/>
<div style="width: 100%;text-align: center;"><input type="submit" value="登 录" id="butt" class="btn btn-success" /></div>
</form>
</div>
</body>
</html>
4. index.html 登录成功
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>验证成功！</h2>
</body>
</html>