验证码生成失败

Question

严重: Allocate exception for servlet [Kaptcha]
java.lang.ClassNotFoundException: com.google.code.kaptcha.servlet.KaptchaServlet
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1136)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:544)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:525)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:150)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1044)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:773)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)atorg.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(UnknownSource)atorg.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

Answer 1

翔仔 2018-11-09 22:30:29

没懂，changeVerifyCode is not defined 

同学你common.js里面有

function changeVerifyCode(img) {

img.src = "../Kaptcha?" + Math.floor(Math.random() * 100);

}

这个function吗？

并且如果有，你是否清楚了浏览器缓存了呢

• 提问者 weibo_RUES无需言_0 #1

  有这个function,没有清除过浏览器缓存

• 提问者 weibo_RUES无需言_0 #2

  昨天晚上更换验证码一直报错，今天早上莫名其妙的就不报错了。。。

• 翔仔 回复 提问者 weibo_RUES无需言_0 #3

  那就还是缓存的问题，js修改后记得清除页面缓存

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Answer 2

提问者 weibo_RUES无需言_0 2018-11-09 22:44:02

111

Answer 3

提问者 weibo_RUES无需言_0 2018-11-09 22:16:15

可以生成验证码了，我什么都没改，也没重启tomcat.好奇怪

现在点击更换的时候浏览器上面报错：

shopoperation:141 Uncaught ReferenceError: changeVerifyCode is not defined
    at HTMLImageElement.onclick (shopoperation:141)
    at a.sendClick (sm.min.js:7)
    at a.onTouchEnd (sm.min.js:7)
    at HTMLBodyElement.<anonymous> (sm.min.js:7)

已经引入了common.js。。