backgroundcontroller.groovy

一个为 Java/J2EE生成的最简化CAPTCHA的框架

import java.awt.Color

import nl.captcha.Captcha
import nl.captcha.backgrounds.*
import nl.captcha.servlet.CaptchaServletUtil

/** 
* Exercise the various background renderers.
**/

class BackgroundController {
    def final WIDTH = 200
    def final HEIGHT = 50

    def simple = {
        def captcha = new Captcha.Builder(WIDTH, HEIGHT)
            .addText()
            .addBackground()
            .build()
        CaptchaServletUtil.writeImage(response, captcha.image)
    }

    def squiggles = {
        def captcha = new Captcha.Builder(WIDTH, HEIGHT)
            .addText()
            .addBackground(new SquigglesBackgroundProducer())
            .build()
        CaptchaServletUtil.writeImage(response, captcha.image)
    }

    def flatcolor = {
        def captcha = new Captcha.Builder(WIDTH, HEIGHT)
            .addText()
            .addBackground(new FlatColorBackgroundProducer())
            .build()
        CaptchaServletUtil.writeImage(response, captcha.image)
    }

    def blue = {
        def captcha = new Captcha.Builder(WIDTH, HEIGHT)
            .addText()
            .addBackground(new FlatColorBackgroundProducer(Color.BLUE))
            .build()
        CaptchaServletUtil.writeImage(response, captcha.image)
    }

    def gradiated = {
        def captcha = new Captcha.Builder(WIDTH, HEIGHT)
            .addText()
            .addBackground(new GradiatedBackgroundProducer())
            .build()
        CaptchaServletUtil.writeImage(response, captcha.image)
    }
}