Java production verification code tool class

1. Number addition and subtraction tools

1.1 Effect

1.2 base64 package

<dependency>
    <groupId>org.apache.axis</groupId>
    <artifactId>axis</artifactId>
    <version>1.4</version>
</dependency>

 base image transfer address

base64 image online conversion tool - webmaster tools

1.3 Code

@Data
public class ImageCode {

    //图形结果
    public String code;
    //图片
    public ByteArrayInputStream image;
    //宽
    private int wight = 400;
    //高
    private int height = 100;

    public static ImageCode getInstance() {
        return new ImageCode();
    }

    public ImageCode() {
        //图形缓冲区
        BufferedImage image = new BufferedImage(wight, height, BufferedImage.TYPE_3BYTE_BGR);
        //画笔
        Graphics graphics = image.getGraphics();
        //设置颜色
        graphics.setColor(new Color(46, 173, 144));
        //画矩形
        graphics.fillRect(0, 0, wight, height);
        //设置字体
        graphics.setFont(new Font("宋体", Font.PLAIN, 30));
        //设置随机数
        Random random = new Random();
        //算数验证码
        int num1 = random.nextInt(20);
        int num2 = random.nextInt(20);
        //设置颜色
        graphics.setColor(new Color(2, 0, 0));
        //画图
        int Y = 60;
        graphics.drawString(String.valueOf(num1), wight / 6 * 0 + 50, Y);
        graphics.drawString("+", wight / 6 * 1 + 50, Y);
        graphics.drawString(String.valueOf(num2), wight / 6 * 2 + 50, Y);
        graphics.drawString("=", wight / 6 * 3 + 50, Y);
        graphics.drawString("?", wight / 6 * 4 + 50, Y);
        //计算值
        int result = num1 + num2;
        this.code = result + "";
        //收笔
        graphics.dispose();

        ByteArrayInputStream inputStream = null;
        ByteOutputStream outputStream = new ByteOutputStream();

        //赋值给ByteArrayInputStream
        try {
            ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(outputStream);
            ImageIO.write(image, "png", imageOutputStream);

            inputStream = new ByteArrayInputStream(outputStream.toByteArray());
        } catch (IOException e) {
            e.printStackTrace();
        }
        //生成图片
        this.image = inputStream;
    }

    public static void main(String[] args) throws IOException {
        ImageCode imageCode = new ImageCode();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ByteArrayInputStream inputStream = imageCode.getImage();
        byte[] bytes = new byte[1024];
        while (inputStream.read(bytes) != -1) {
            outputStream.write(bytes);
        }
        String base64 = Base64.encode(outputStream.toByteArray());
        outputStream.flush();
        outputStream.close();
        inputStream.close();
        System.out.println("计算结果:"+imageCode.getCode());
        System.out.println("data:image/png;base64,"+base64);
    }
}

2. Confusing tool production verification code

2.1 Guide package

<!--hutool-->
<dependency>
   <groupId>cn.hutool</groupId>
   <artifactId>hutool-all</artifactId>
   <version>5.8.18</version>
</dependency>

 2.2 Effect

2.3 Code

 @GetMapping("test1")
    public void test1(HttpServletResponse response) throws IOException {
        //定义图形验证码的长和宽
        LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(116, 36, 4, 5);
        System.out.println("获取图形验证码结果，进行缓存" + lineCaptcha.getCode());
        System.out.println("转成base64 -> "+"data:image/png;base64,"+lineCaptcha.getImageBase64());
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            //验证码写到页面上
            lineCaptcha.write(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (outputStream != null) {
                outputStream.close();
            }
        }

    }

3. Happy-captchaProduction verification code

官网：https://gitee.com/ramostear/Happy-Captcha?_from=gitee_search

3.1 Effect 

 

 

3.2 Guide package 

<dependency>
   <groupId>com.ramostear</groupId>
   <artifactId>Happy-Captcha</artifactId>
   <version>1.0.1</version>
</dependency>

3.3 Code

@GetMapping("test2")
    public void test2(HttpServletResponse response, HttpServletRequest request) {
        //生成验证码
        HappyCaptcha.require(request, response)
                .style(CaptchaStyle.ANIM)   //设置样式
                .build()
                .finish();
    }

    @GetMapping("test3")
    public String test3(String code, HttpServletRequest request) {
        boolean flag = HappyCaptcha.verification(request,code,true);
        if(flag){
            //通过了当前验证以后，移除当前验证
            HappyCaptcha.remove(request);
            System.out.println("通过了验证");
            return "success";
        }
        return "fail";
    }

 4. easy-captcha generates verification code

4.1 Effect

 

4.2 Guide package

<dependency>
    <groupId>com.github.whvcse</groupId>
    <artifactId>easy-captcha</artifactId>
    <version>1.6.2</version>
</dependency>

4.3 Code

@GetMapping("test4")
    public void test4(HttpServletResponse response, HttpServletRequest request) throws IOException {
        // 普通验证码
        SpecCaptcha specCaptcha = new SpecCaptcha();
        System.out.println("验证码结果:"+specCaptcha.text());
        com.wf.captcha.utils.CaptchaUtil.out(specCaptcha,request,response);
    }

    @GetMapping("test5")
    public void test5(HttpServletResponse response, HttpServletRequest request) throws IOException {
        // 生成算数验证码
        ArithmeticCaptcha arithmeticCaptcha = new ArithmeticCaptcha();
        //设置3为计算长度
        arithmeticCaptcha.setLen(3);
        System.out.println("验证码结果:"+arithmeticCaptcha.text());
        com.wf.captcha.utils.CaptchaUtil.out(arithmeticCaptcha,request,response);
    }