Blade-Patchca: verification code library for Java

Overview

Simple yet powerful verification code library written in Java with zero dependency.

You can generate verification code picture like this:

Steps to Integrate

• Add following dependency in your pom.xml

<dependency>
    <groupId>com.hellokaton</groupId>
    <artifactId>blade-patchca</artifactId>
    <version>1.2.0</version>
</dependency>

• Add following dependency in your code

ConfigurableCaptchaService cs = new ConfigurableCaptchaService();
cs.setColorFactory(new SingleColorFactory(new Color(25, 60, 170)));
cs.setFilterFactory(new CurvesRippleFilterFactory(cs.getColorFactory()));

FileOutputStream fos = new FileOutputStream("demo.png");
String challenge = EncoderHelper.getChallangeAndWriteImage(cs, "png", fos);
//Challenge text needs to be kept in the session for verification 
fos.close();

• Use following code to create differnt types of captcha

switch (new Random().nextInt(5)) {
    case 0:
        cs.setFilterFactory(new CurvesRippleFilterFactory(cs.getColorFactory()));
        break;
    case 1:
        cs.setFilterFactory(new MarbleRippleFilterFactory());
        break;
    case 2:
        cs.setFilterFactory(new DoubleRippleFilterFactory());
        break;
    case 3:
        cs.setFilterFactory(new WobbleRippleFilterFactory());
        break;
    case 4:
        cs.setFilterFactory(new DiffuseRippleFilterFactory());
        break;
}