java jcaptcha_jcaptcha验证码使用（一）

packagecn.util;importjava.awt.Font;importcom.octo.captcha.CaptchaFactory;importcom.octo.captcha.component.image.backgroundgenerator.UniColorBackgroundGenerator;importcom.octo.captcha.component.image.color.RandomRangeColorGenerator;importcom.octo.captcha.component.image.fontgenerator.RandomFontGenerator;importcom.octo.captcha.component.image.textpaster.RandomTextPaster;importcom.octo.captcha.component.image.wordtoimage.ComposedWordToImage;importcom.octo.captcha.component.word.FileDictionary;importcom.octo.captcha.component.word.wordgenerator.ComposeDictionaryWordGenerator;importcom.octo.captcha.engine.GenericCaptchaEngine;importcom.octo.captcha.image.gimpy.GimpyFactory;importcom.octo.captcha.service.image.ImageCaptchaService;importcom.octo.captcha.service.multitype.GenericManageableCaptchaService;public classCaptchaServiceSingleton {private static ImageCaptchaService service = null;public staticImageCaptchaService getService(){if(service == null)

service=generatorCaptchaService();returnservice;

}/*** 根据SpringBean的配置文件编写的代码实现

**/

public staticImageCaptchaService generatorCaptchaService(){//生成随机颜色，参数分别表示RGBA的取值范围

RandomRangeColorGenerator textColor = new RandomRangeColorGenerator(new int[]{0,255},new int[]{0,180},new int[]{0,210},new int[]{255,255});//随机文字多少和颜色，参数1和2表示最少生成多少个文字和最多生成多少个

RandomTextPaster randomTextPaster = new RandomTextPaster(4, 5, textColor,true);//生成背景的大小这里是宽85高40的图片，也可以设置背景颜色和随机背景颜色，这里使用默认的白色

UniColorBackgroundGenerator colorbgGen = new UniColorBackgroundGenerator(85,40);//随机生成的字体大小和字体类型，参数1和2表示最小和最大的字体大小，第三个表示随机的字体

RandomFontGenerator randomFontGenerator = new RandomFontGenerator(20, 25, new Font[]{new Font("Arial", 0, 10),new Font("Tahoma",0,10)});//结合上面的对象构件一个从文本生成图片的对象

ComposedWordToImage cwti = newComposedWordToImage(randomFontGenerator,colorbgGen,randomTextPaster);//随机文本的字典，这里是使用jcaptcha-1.0-all.jar中的文本字典，字典名称为toddlist.properties

ComposeDictionaryWordGenerator cdwg = new ComposeDictionaryWordGenerator(new FileDictionary("toddlist"));

GimpyFactory gf= newGimpyFactory(cdwg, cwti);

GenericCaptchaEngine gce= new GenericCaptchaEngine(newCaptchaFactory[]{gf});//返回一个Service对象，这里180是验证码存在的时间，单位是秒，200000是最大存储大小

return new GenericManageableCaptchaService(gce,180,200000,75000);

}

}