Friday, December 31, 2021

[FIXED] IntelliJ IDEA cannot resolve import javax.servlet.*;

December 31, 2021 intellij-idea, java, servlets, tomcat

Issue

So I had my project working perfectly and I decided to install a new hard drive (SSD) and now I cannot get it to run correctly.

I am using Intellij and am having all of these imports have issues.

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

They are saying cannot resolve symbol.

Also in my web.xml I have this.

<filter>
    <filter-name>LoginFilter</filter-name>
    <filter-class>com.mkyong.LoginFilter</filter-class>
</filter>

it states

com.mkyong.LoginFilter is not assignable to javax.servlet.Filter

Im going to include my web.xml just in case someone needs it.

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
id="WebApp_ID" version="2.5">

<display-name>JavaServerFaces</display-name>

<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/mkyongdb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>


<!-- Change to "Production" when you are ready to deploy -->
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>

<!-- Welcome page -->
<welcome-file-list>
<welcome-file>faces/default.xhtml</welcome-file>
</welcome-file-list>

<!-- JSF mapping -->
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

  <!-- Map these files with JSF -->
 <servlet-mapping>
  <servlet-name>Faces Servlet</servlet-name>
  <url-pattern>/faces/*</url-pattern>
 </servlet-mapping>

 <servlet-mapping>
   <servlet-name>Faces Servlet</servlet-name>
   <url-pattern>*.jsf</url-pattern>
 </servlet-mapping>

<servlet-mapping>
  <servlet-name>Faces Servlet</servlet-name>
  <url-pattern>*.faces</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>

<filter>
    <filter-name>LoginFilter</filter-name>
    <filter-class>com.mkyong.LoginFilter</filter-class>
</filter>
<!-- Set the login filter to secure all the pages in the /secured/* path of the application  -->
<filter-mapping>
    <filter-name>LoginFilter</filter-name>
    <url-pattern>/secured/*</url-pattern>
</filter-mapping>

<!-- By default go to secured welcome page -->
<welcome-file-list>
    <welcome-file>secured/welcome.xhtml</welcome-file>
</welcome-file-list>

</web-app>

This is the error I am getting now.

   javax.servlet.ServletException: Servlet.init() for servlet Faces Servlet threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:534)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)
root cause

java.lang.IllegalStateException: Application was not properly initialized at startup, could not    find Factory: javax.faces.context.FacesContextFactory
javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:800)
javax.faces.FactoryFinder.getFactory(FactoryFinder.java:302)
javax.faces.webapp.FacesServlet.init(FacesServlet.java:186)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:534)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)

I was also using apache tomcat 8 at first then I thought that might be the issue and I changed it to 7 then to 6. If you need anything else please let me know!

here is the POM.xml as requested.

  <project xmlns="http://maven.apache.org/POM/4.0.0" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
 http://maven.apache.org/maven-v4_0_0.xsd">

 <modelVersion>4.0.0</modelVersion>
 <groupId>com.mkyong.common</groupId>
 <artifactId>JavaServerFaces</artifactId>
 <packaging>war</packaging>
 <version>1.0-SNAPSHOT</version>
 <name>JavaServerFaces Maven Webapp</name>
 <url>http://maven.apache.org</url>

<repositories>
 <repository>
   <id>java.net.m2</id>
   <name>java.net m2 repo</name>
   <url>http://download.java.net/maven/2</url>
 </repository>
</repositories>

<dependencies>

  <dependency>
      <groupId>org.springframework.security</groupId>
      <artifactId>spring-security-web</artifactId>
      <version>3.2.5.RELEASE</version>
  </dependency>

<!-- MySQL database driver -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.9</version>
</dependency>

<!-- Spring framework --> 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring</artifactId>
    <version>2.5.6</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>2.5.6</version>
</dependency>


<!-- For Servlet Container like Tomcat -->
<!-- http://download.java.net/maven/2 -->
<dependency>
  <groupId>com.sun.faces</groupId>
  <artifactId>jsf-api</artifactId>
  <version>2.1.0-b03</version>
</dependency>



<!-- EL 2.2 to support method parameter in EL -->
<dependency>
  <groupId>org.glassfish.web</groupId>
  <artifactId>el-impl</artifactId>
  <version>2.2</version>
</dependency>


<!-- http://repo1.maven.org/maven2/ -->
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>jstl</artifactId>
  <version>1.2</version>
</dependency>

  <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.1</version>
  </dependency>

  <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
  </dependency>


</dependencies>


 <build>
   <finalName>JavaServerFaces</finalName>

  <plugins>
     <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-compiler-plugin</artifactId>
       <version>2.3.1</version>
       <configuration>
           <source>1.6</source>
           <target>1.6</target>
       </configuration>
   </plugin>
</plugins>

Solution

The servlet-api.jar is part of your server (Tomcat in this case). You need to either state a reference to that jar in your POM and mark it in 'provided' scope or (if you are not using maven for some reason) you need to add it to your classpath (the libraries of your web module in your project).

The chances are perhaps that your Tomcat installation forder or maven repo is different after your HD reinstall. It seems to be like an environmental issue.

Answered By - Filip

This Answer collected from stackoverflow and tested by JavaFixing community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

Friday, December 31, 2021

[FIXED] IntelliJ IDEA cannot resolve import javax.servlet.*;

Issue

Solution

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