开源项目patchca生成验证码.doc

用之前要导入patchcajar包，可能会与tomcat的lib目录下的jar包发生冲突，一切准备好之后在使用下面的代码（导入jar包后，先发布其他的项目试试，没问题的发继续）

packagecom.ninemax.cul.servlet;

importjava.awt.Color;
importjava.awt.Graphics;
importjava.awt.image.BufferedImage;
importjava.awt.image.BufferedImageOp;
importjava.io.IOException;
importjava.io.OutputStream;
importjava.util.ArrayList;
importjava.util.List;
importjava.util.Random;

importjavax.imageio.ImageIO;
importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importjavax.servlet.http.HttpSession;

importorg.patchca.background.BackgroundFactory;
importorg.patchca.color.ColorFactory;
importorg.patchca.color.RandomColorFactory;
importorg.patchca.filter.ConfigurableFilterFactory;
importorg.patchca.filter.library.AbstractImageOp;
importorg.patchca.filter.library.WobbleImageOp;
importorg.patchca.font.RandomFontFactory;
importorg.patchca.service.Captcha;
importorg.patchca.service.ConfigurableCaptchaService;
importorg.patchca.text.renderer.BestFitTextRenderer;
importorg.patchca.text.renderer.TextRenderer;
importorg.patchca.word.RandomWordFactory;

/**
*验证码生成类
*
*使用开源验证码项目patchca生成
*依赖jar包：patchca-0.5.0.jar
*项目网址：https://code.google.com/p/patchca/
*
*@authorzyh
*@version1.002012-7-12New
*/
publicclassValidationCodeServletextendsHttpServlet{
privatestaticfinallongserialVersionUID=5126616339795936447L;

privateConfigurableCaptchaServiceconfigurableCaptchaService=null;
privateColorFactorycolorFactory=null;
privateRandomFontFactoryfontFactory=null;
privateRandomWordFactorywordFactory=null;
privateTextRenderertextRenderer=null;

publicValidationCodeServlet(){
super();
}

/**
*Servlet销毁方法,负责销毁所使用资源.<br>
*/
publicvoiddestroy(){
wordFactory=null;
colorFactory=null;
fontFactory=null;
textRenderer=null;
configurableCaptchaService=null;
super.destroy();//Justputs"destroy"stringinlog
}

publicvoiddoGet(HttpServletRequestrequest,HttpServletResponserespon