spring boot 集成 kaptcha

kaptcha是一个开源的验证码实现库

1.添加依赖

<dependency>
    <groupId>com.github.axet</groupId>
    <artifactId>kaptcha</artifactId>
    <version>0.0.9</version>
</dependency>

2.添加配置类

配置验证码的生成属性

package com.dream.road.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
    public DefaultKaptcha producer() {
        Properties properties = new Properties();
        // 设置边框
        properties.put("kaptcha.border", "yes");
        // 设置边框颜色
        properties.put("kaptcha.border.color", "105,179,90");
        // 设置字体颜色
        properties.put("kaptcha.textproducer.font.color", "black");
        // 设置图片宽度
        properties.put("kaptcha.image.width", "160");
        // 设置图片高度
        properties.put("kaptcha.image.height", "50");
        //设置字体尺寸
        properties.put("kaptcha.textproducer.font.size", "30");
        // 设置验证码长度
        properties.put("kaptcha.textproducer.char.length", "5");
        // 设置字体
        properties.put("kaptcha.textproducer.font.names", "宋体,楷体,黑体");

        Config config = new Config(properties);
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

参数:

  kaptcha.border:图片边框,值:yes , no

  kaptcha.border.color:边框颜色,值: r,g,b (and optional alpha) 或者 white,black,blue

  kaptcha.image.width:图片宽

  kaptcha.image.height:图片高

  kaptcha.textproducer.char.length:验证码长度

  kaptcha.textproducer.font.names:字体

  kaptcha.textproducer.font.size:字体大小

  kaptcha.textproducer.font.color:字体颜色

  kaptcha.textproducer.char.space:文字间隔

  kaptcha.background.clear.from:背景颜色渐变,开始颜色

  kaptcha.background.clear.to:背景颜色渐变,结束颜色

3.生成验证码api

package com.dream.road.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

@RestController
public class LoginController {

    @Autowired
    private Producer producer;

    @GetMapping("captcha.jpg")
    public void captcha(HttpServletResponse response, HttpServletRequest request) throws ServletException, IOException {
        response.setHeader("Cache-Control", "no-store, no-cache");
        response.setContentType("image/jpeg");

        // 生成文字验证码
        String text = producer.createText();
        // 生成图片验证码
        BufferedImage image = producer.createImage(text);
        // 保存到验证码到 session
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, text);

        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(image, "jpg", out);
        IOUtils.closeQuietly(out);
    }

}

4.测试

原文地址:https://www.cnblogs.com/baby123/p/13332064.html