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、验证代码
软件包valyimg;导入java.awt.color; import java.io.io.io.ioexception; import java.util.random; import javax.servlet.servlet.servlet.servlet.servlet.servlet.servletexception; import javax.servlet.http.httppservlet; import javax.servax.servect; impt javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import com.github.bingoohuang.patchca.color.ColorFactory;import com.github.bingoohuang.patchca.custom.ConfigurableCaptchaService;import 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.WobbleRippleFilterFactory;import com.github.bingoohuang.patchca.utils.encoder.EncoderHelper;import com.github.bingoohuang.patchca.word.randomwordfactory;公共类ValterCode扩展了httpservlet {private static configurablecaptchaservice cs = new ConfigurableCaptChaservice（）;私有静态随机随机= new Random（）;静态{// cs.setColorFactory（new SinglecolorFactory（新颜色（25，60，170）））; cs.setColorFactory（new ColorFactory（）{@Override公共颜色getColor（int x）{int [int [] c = new int [3]; int i = random.nextint（c.length）; for（int fi = 0; fi = 0; fi <c.length; c.length; fi ++） = Random.nextint（256）;}}返回新颜色（C [0]，C [1]，C [2] RandomWordFactory wf = new RandomWordFactory（）; wf.setcharacters（“ 23456789abcdefghigkmnpqrstuvwxyzabcdefghigghigklmnpqrstuvwxyz”）; wf.setmaxlength（4）; wf.setminlength（4）; cs.setWordFactory（WF）; } public void doget（httpservletrequest请求，httpservletresponse响应）抛出ServletException，ioexception {switch（randy..nextint（5））{case 0：cs.setfilterfactory（cs.setfilterfactory（新的休息;案例1：cs.setFilterFactory（新的MarblerippleFilterFactory（））;休息;案例2：cs.setFilterFactory（新的DoubleerippleFilterFactory（））;休息;案例3：cs.setFilterFactory（new WobblerippleFilterFactory（））;休息;案例4：cs.setFilterFactory（新的diffuseripplefilterfactory（））;休息; } httpsession session = request.getSession（false）; if（session == null）{session = request.getSession（）; } setResponseheaders（响应）;字符串token = encoderHelper.getChallangeandWriteImage（CS，“ PNG”，Response.getOutputStream（））; session.setAttribute（“ valtercode”，token）; system.out.println（“当前的sessionid =” + session.getID（） +“，验证码=，” + token）; }受保护的void setResponseheaders（httpservletResponse响应）{wendment.setContentType（“ image/png”）;响应。响应。长时间= system.currentTimeMillis（）; response.setDateHeader（“最后修饰”，时间）; response.setDateHeader（“ date”，time）; response.setDateHeader（“到期”，时间）; } public void dopost（httpservletrequest请求，httpservletresponse响应）抛出ServletException，ioexception {}} 2.xml代码
<dependency> <groupId> com.github.bingoohuang </groupId> <ArtifactId> patchca </artifactid> </artifactid> <版本> 0.0.1 </distry> </deverency> <servlet> <servlet> <servlet-name> valtlet-name> valtlet-name> valtlet-> </servlet-name> <servlet-name> <servlet-class> <servlet-class> <servlet-class> <servlet-name> vallycode </servlet-name> <url-pattern>/validimg.jpg </url-pattern> </servlet-mapping>
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