图形验证码开发之谷歌kaptcha引入

Kaptcha 框架介绍

• 谷歌开源的一个可高度配置的实用验证 码生成工具
  • 验证码的字体/大小/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(⻥眼样式、3D、普通模糊)

       <!--kaptcha依赖包-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>kaptcha-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;

@Configuration
public class CaptchaConfig {

    /**
     * 验证码配置
     * Kaptcha配置类名
     *
     * @return
     */
    @Bean
    @Qualifier("captchaProducer")
    public DefaultKaptcha kaptcha() {
        DefaultKaptcha kaptcha = new DefaultKaptcha();
        Properties properties = new Properties();
        //边框
//    properties.setProperty(Constants.KAPTCHA_BORDER, "yes");
//    properties.setProperty(Constants.KAPTCHA_BORDER_COLOR, "220,220,220");
//    //properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_COLOR, "38,29,12");
        //宽高
//    properties.setProperty(Constants.KAPTCHA_IMAGE_WIDTH, "147");
//    properties.setProperty(Constants.KAPTCHA_IMAGE_HEIGHT, "34");
//    properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_SIZE, "25");
//    //properties.setProperty(Constants.KAPTCHA_SESSION_KEY, "code");
        //验证码个数
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
//    properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Courier");
        //字体间隔
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_SPACE,"8");
        //干扰线颜色
//    properties.setProperty(Constants.KAPTCHA_NOISE_COLOR, "white");
        //干扰实现类
        properties.setProperty(Constants.KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
        //图片样式
        properties.setProperty(Constants.KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.WaterRipple");
        //文字来源
        properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_STRING, "0123456789");
        Config config = new Config(properties);
        kaptcha.setConfig(config);
        return kaptcha;
    }
}

import com.google.code.kaptcha.Producer;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import net.xdclass.enums.BizCodeEnum;


import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

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.IOException;
import java.util.concurrent.TimeUnit;

@Api(tags = "通知模块")
@RestController
@RequestMapping("/api/user/v1")
@Slf4j
public class NotifyController {
    @Autowired
    private Producer captchaProducer;
    /**
     * 获取图形验证码
     * @param request
     * @param response
     */
    @ApiOperation("获取图形验证码")
    @GetMapping("captcha")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response){

        String captchaText = captchaProducer.createText();
        log.info("图形验证码:{}",captchaText);

        BufferedImage bufferedImage = captchaProducer.createImage(captchaText);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            ImageIO.write(bufferedImage,"jpg",outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            log.error("获取图形验证码异常:{}",e);
        }

    }
}