У меня есть следующий код сервлета
public void doPost(HttpServletRequest request, HttpServletResponse response){
Backup bup = new Backup();
bup.doBackup();
response.setContentType("text/html");
PrintWriter out;
try {
out = response.getWriter();
out.println("You backed up your data - well hopefully");
out.flush();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
И следующая трассировка стека
javax.servlet.ServletException: Class view.BackupServlet не является сервлетом
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter. java:293)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
java.lang.Thread.run(Thread.java:619)
основная причина
java.lang.ClassCastException:
view.BackupServlet не может быть приведен к
javax.servlet .Servlet
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache. tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
java.lang.Thread.run(Thread.java:619)
и web.xml
Backup
index.html
index.htm
index.jsp
default.html
default.htm
default.jsp
BackupServlet
BackupServlet
BackupServlet
view.BackupServlet
BackupServlet
/BackupServlet
`
Подробнее здесь: https://stackoverflow.com/questions/103 ... vlet-error
