本文为大家分享了java实用验证码的实现代码、供大家参考、具体内容如下
1、validcode
package valimimg; Import java.awt.color; Import java.io.ioexception; Import java.util.random; Import javax.servlet.servletexception; Import javax.servlet.httpservlet; Import javax.servlet.http.httpservletrequest; Import; javax.servlet.http.httpservletresponse; Import javax.servlet.http.httpsession; import com.githoohuang.patchca.color.colorfactory; Import com.github.bingoohuang.patchca.custom.custom.custom.custom.configurablecaptecapthaservice; com.github.bingoohuang.patchca.filter.predefined.CurvesRippleFilterFactory;import com.github.bingoohuang.patchca.filter.predefined.DiffuseRippleFilterFactory;import com.github.bingoohuang.patchca.filter.predefined.DoubleRippleFilterFactory;import com.github.bingoohuang.patchca.filter.predefined.marbleripplefilterfactory; import com.github.bingoohuang.patchca.filter.predefined.wobblerfilterfactory; Import com.github.bingoohuang.patchca.utils.encoder. com.github.bingoohuang.patchca.word.randomwordfactory; public class validcode extends httpservlet {private static configurablecaptchaservice cs = new configurablecaptchaservice（）; private static random = new Random（）; static {// cs.setColorFactory（new SingleColorFactory（new Color（25、60、170）））; cs.setColorFactory（new Colurfactory（）{@Override public color getColor（int x）{int [] c = new int [3]; int i = random.nextint（c.length）; for（int fi = 0; fi <c.length; fi ++）{if（fi == i）{c [fi] = random.nextint（71）; andextint（256）; randomwordfactory wf = new RandomWordFactory（）; wf.setcharacters（ "23456789ABCDEFGHIGKMNPQRSTUVWXYZABCDEFGHIGKLMNPQRSTUVWXYZ"）; wf.setmaxlength（4）; wf.setminlength（4）; cs.SetWordFactory（WF）; } public void doget（httpservletrequest request、httpservletresponse応答）servletexception、ioexception {switch（random.nextint（5））{case 0：cs.setfilterfactory（new curvesripplefilterfactory（cs .getcolorfactory（））;壊す;ケース1：Cs.SetFilterFactory（new MarblerIppleFilterFactory（））;壊す;ケース2：Cs.SetFilterFactory（new DoubleRippleFilterFactory（））;壊す;ケース3：cs.SetFilterFactory（new WobblerIppleFilterFactory（））;壊す;ケース4：cs.setfilterfactory（new diffuseripplefilterfactory（））;壊す; } httpsession session = request.getSession（false）; if（session == null）{session = request.getSession（）; } setResponseHeaders（response）; string token = encoderhelper.getChallangeandWriteImage（cs、 "png"、respons.getOutputStream（））; session.setattribute（ "validcode"、token）; system.out.println（ "当前的sessionid =" + session.getid（） + "、验证码=、" + token）; }保護されたvoid setResponseHeaders（httpservletResponse応答）{respons.setContentType（ "image/png"）; Response.setheader（ "Cache-Control"、 "No-Cache、No-Store"）; Response.setheader（ "Pragma"、 "no-cache"）; long time = system.currenttimemillis（）; Response.setDateHeader（ "last-modified"、time）; Response.setDateHeader（ "date"、time）; Response.setDateHeader（ "expires"、time）; } public void dopost（httpservletrequest request、httpservletresponse応答）throws servletexception、ioexception {}} 2.xml代码
<Dependency> groupId> com.githoohuang </groupid> <artifactid> patchca </artifactid> <version> 0.0.1 </version> </dependency> <servlet> <servlet-name> validcode </servet-name> <servet-class> validimg.validg.validgode <servlet-name> validcode </servlet-name> <url-pattern>/validimg.jpg </url-pattern> </servlet-mapping>
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