异常：java.lang.ClassCastException: testServlet.Test1 cannot be cast to javax.servlet.Servlet

异常：java.lang.ClassCastException: testServlet.Test1 cannot be cast to javax.servlet.Servlet

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1116)

at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)

at java.lang.Thread.run(Thread.java:745)

 

 

原因：两个包里含两个相同的servlet-api.jar包

 

处理方式：打开pom.xml->dependencies->选择jar包->properties->将scope改为provided

记得保存哦！

冲突问题（两个包里含两个相同的jar包）：