I was trying to implement a login filter in my web app with jsf 2, following this guide:

after I compiled my filter and added the .class in "web-inf/classes" (as the guide says) the filter worked, but i put the wrong url to redirect to the login page so i deleted the filter.class from the folder (web-inf/classes) and tried to compile the project again , but it failed, and since then im getting "package javax.servlet does not exist"

it is weird because before it was working and i have javax.servlet in my pom.xml.. i tried cleaning the project, but nothing.

this is my filter class:

package Bean;

import java.io.IOException;

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.annotation.WebFilter;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

/**

* Created with IntelliJ IDEA.

* User: rodrigo

* Date: 28-04-13

* Time: 06:54 AM

* To change this template use File | Settings | File Templates.

*/

@WebFilter("/Contenido/*")

public class filtro implements Filter {

@Override

public void init(FilterConfig config) throws ServletException {

// If you have any in web.xml, then you could get them

// here by config.getInitParameter("name") and assign it as field.

}

@Override

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws ServletException, IOException {

HttpServletRequest req = (HttpServletRequest) request;

LoginBean user = (LoginBean) req.getSession().getAttribute("user");

if (user != null && user.isLoggedIn()) {

// User is logged in, so just continue request.

chain.doFilter(request, response);

} else {

// User is not logged in, so redirect to index.

HttpServletResponse res = (HttpServletResponse) response;

res.sendRedirect(req.getContextPath() + "/Contenido/Login.xhtml");

}

}

@Override

public void destroy() {

// If you have assigned any expensive resources as field of

// this Filter class, then you could clean/close them here.

}

}

this is the error:

\Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[5,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[6,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[7,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[8,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[9,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[10,20] error: package javax.servlet does not exist

[ERROR] \Users\rodrigo\IdeaProjects\Frutemu\src\main\java\Bean\filtro.java:[11,31] error: package javax.servlet.annotation does not exist

my pom.xml:

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

4.0.0

Frutemu

Frutemu

war

1.0-SNAPSHOT

Frutemu Maven Webapp

http://maven.apache.org

prime-repo

Prime Repo

http://repository.primefaces.org

junit

junit

3.8.1

test

javax.ejb

ejb-api

3.0

provided

org.primefaces

primefaces

3.5

org.primefaces.themes

all-themes

1.0.9

javax.faces

jsf-api

2.0

compile

com.sun.faces

jsf-impl

2.0.2-b10

compile

javax.servlet

jstl

1.2

mysql

mysql-connector-java

5.1.21

org.glassfish.web

el-impl

2.2.1-b04

provided

org.apache.openjpa

openjpa-all

2.2.0

com.microsoft.sqlserver

sqljdbc4

4.0

net.sf.jasperreports

jasperreports

4.1.2

Frutemu

org.apache.openjpa

openjpa-maven-plugin

2.2.0

**/model/*.class

true

true

enhancer

process-classes

enhance

org.apache.tomcat.maven

tomcat7-maven-plugin

2.0

http://127.0.0.1:8080/manager/text

TomcatServer

/Frutemu

org.codehaus.mojo

jasperreports-maven-plugin

compile-reports

net.sf.jasperreports

jasperreports

4.1.2

解决方案

The javax.servlet dependency is missing in your pom.xml. Add the following to the dependencies-Node:

javax.servlet

javax.servlet-api

3.0.1

provided