springboot整合验证码

    
      com.github.axet
      kaptcha
      0.0.9
    

@Configuration
public class CaptchaConfig {
    @Bean
    public DefaultKaptcha getDefaultKaptcha(){
        //验证码生成器
        DefaultKaptcha defaultKaptcha=new DefaultKaptcha();
        //配置
        Properties properties=new Properties();
        //是否有边框
        properties.setProperty("kaptcha.border","yes");
        //设置边框颜色
        properties.setProperty("kaptcha.border.color","105,179,90");
        //设置验证码
        properties.setProperty("kaptcha.session.key","code");
        //验证码文本字符颜色和样式
        properties.setProperty("kaptcha.textproducer.font.color","blue");
        //设置字体样式
        properties.setProperty("kaptcha.textproducer.font.names","宋体,楷体,微软雅黑");
        //字体大小
        properties.setProperty("kaptcha.textproducer.font.size","30");
        //验证码文字字符内容范围默认是abced2345678gfynmnpwx
        //字符长度默认为5
        properties.setProperty("kaptcha.textproducer.char.length","4");
        //验证码图片宽度默认200
        properties.setProperty("kaptcha.image.width","100");
        //验证码图片高度默认40
        properties.setProperty("kaptcha.image.height","40");
        Config config=new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

@RestController
public class CaptchaController {
    @Autowired
    private DefaultKaptcha defaultKaptcha;



    @ApiOperation(value="验证码")
    @GetMapping(value = "/captcha",produces = "image/jpeg")
    public void captcha(HttpServletRequest request, HttpServletResponse response){
    //定义response输出类型为image/jpeg类型
        response.setDateHeader("Expires",0);
        response.addHeader("Cache-Control","post-check=0,pre-check=0");
        response.setHeader("Pragma","no-cache");
        response.setContentType("image/jpeg");
        //生成验证码begin
        //获取文本内容
        String  text=defaultKaptcha.createText();
        System.out.println("验证码内容: " + text);
        //将验证码放入session
        request.getSession().setAttribute("captcha",text);
        //根据文本内容创建图形验证码
        BufferedImage image=defaultKaptcha.createImage(text);
        ServletOutputStream outputStream=null;
        try {
            outputStream = response.getOutputStream();
            //输出流输出图片格式，jpg
            ImageIO.write(image,"jpg",outputStream);
            outputStream.flush();
        }catch (IOException e){
        e.printStackTrace();
        }finally {
            if (null!=outputStream){
                try{
                    outputStream.close();
                }catch (IOException e){
                    e.printStackTrace();
                }
            }
        }
        //生成验证码
    }
}

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