Feel my code there is no problem, don't know if the tomcat configuration problems, or less package
Severe: start the filter abnormal
Java. Lang. ClassNotFoundException: cn. Sjxy. Chapter07. Web. Filter. MyFirstFilter
The at org. Apache. Catalina. Loader. WebappClassLoaderBase. LoadClass (WebappClassLoaderBase. Java: 1358)
The at org. Apache. Catalina. Loader. WebappClassLoaderBase. LoadClass (WebappClassLoaderBase. Java: 1180)
The at org. Apache. Catalina. Core. DefaultInstanceManager. LoadClass (DefaultInstanceManager. Java: 546)
The at org. Apache. Catalina. Core. DefaultInstanceManager. LoadClassMaybePrivileged (DefaultInstanceManager. Java: 527)
The at org. Apache. Catalina. Core. DefaultInstanceManager. NewInstance (DefaultInstanceManager. Java: 150)
The at org. Apache. Catalina. Core. ApplicationFilterConfig. GetFilter (ApplicationFilterConfig. Java: 262)
The at org. Apache. Catalina. Core. ApplicationFilterConfig. & lt; init> (ApplicationFilterConfig. Java: 108)
The at org. Apache. Catalina. Core. StandardContext. FilterStart (StandardContext. Java: 4546)
The at org. Apache. Catalina. Core. StandardContext. StartInternal (StandardContext. Java: 5191)
The at org. Apache. Catalina. Util. LifecycleBase. Start (LifecycleBase. Java: 183)
The at org. Apache. Catalina. Core. ContainerBase $StartChild. Call (1412) ContainerBase. Java:
The at org. Apache. Catalina. Core. ContainerBase $StartChild. Call (1402) ContainerBase. Java:
The at Java. Util. Concurrent. FutureTask. Run (Unknown Source)
The at Java. Util. Concurrent. ThreadPoolExecutor. RunWorker (Unknown Source)
The at Java. Util. Concurrent. ThreadPoolExecutor $Worker. The run (Unknown Source)
The at Java. Lang. Thread. The run (Unknown Source)

Morning of May 01, 2020 10:48:20 org. Apache. Catalina. Core. StandardContext startInternal
Serious: one or more filter start-up failure, full details will be found in the corresponding container log file

CodePudding user response:

Java web filter must implement the filter interface, even if you inherited HttpFilter, also want to implement this interface, or you will be thrown such mistakes

CodePudding user response:

404 is your Servlet.

CodePudding user response:

You put the project name to switch to the ROOT. The war (chapter07. War) try again