Error [solved] The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path

Problem : The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path.
Faced this error while using maven integration with eclipse. 
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
First found this error on the start of JSP page with one red mark over above piece of code.

Solution : Below, I have written three solution for this problem. I guess, one will work for you.

Method 1: Add Maven dependency(pom.xml)
Include servlet-api-3.1.jar in your dependencies.

 <dependency>  
  <groupId>javax.servlet</groupId>  
  <artifactId>javax.servlet-api</artifactId>  
  <version>3.1.0</version>  
  <scope>provided</scope>  
 </dependency>  

Method 2: Add a Runtimes
Properties > Project Facets > Runtimes > Check Server name > Apply > OK (As shown in Image)

Method 3: Select a Runtime to add to the classpath
Java Build Path > Libraries > Add Library > Server Runtime > Next (As shown in Image)
then select a Runtime(Apache Tomcat Server) > Finish > OK (As shown in Image)

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Maven Installation under Windows: “JAVA_HOME is set to an invalid directory”

Problem : JAVA_HOME is set to an invalid directory. please set the java_home variable in your environment variable to match the location of your java installation.

Solution :  
Computer > Properties > Advanced System Settings > System Properties > Advanced > Environment Variables

In System Variables :
Variable Name : JAVA_HOME
Variable Value :  C:\Program Files\Java\jdk1.8.0_45 (Set your JDK)

In System Variable:
Variable Name : path or PATH
Variable Value : [already there+];%JAVA_HOME%\bin

If You are getting still this error then:
To Set JAVA_HOME : go to Command Prompt and Execute following command
set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.8.0_45

Restart your IDE and Command Prompt then install mvn again. 

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Error-JavaEE-Oracle[Solved]-Apache Maven install “'mvn' not recognized as an internal or external command”

Problem : Apache Maven install “'mvn' not recognized as an internal or external command”

Solution : Here I am using Windows 8.1 and Java 8.
1. Check out Maven in your Apache Tomcat Directory. If Maven folder is not there then download it first from this site : https://maven.apache.org/download.cgi
Download apache-maven-3.3.3-bin.zip
Unzip it and paste "apache-maven-3.3.3" inside "apache-tomcat-7.0.54" as I'm using Apache 7.
 
2. Create a user variables like this [ M2 = %M2_HOME% ]

3. Create a user variables like this [M2_HOME = F:\apache-tomcat-7.0.54\apache-maven-3.3.3\bin]
 (as my apache tomcat is in F:\ dive your may be in C:\ drive)

4. Edit the Path or PATH to [What ever is already in here +];%M2%

5. Dependency in pom.xml

6. Now open Command Prompt go-to  "F:\apache-tomcat-7.0.54\apache-maven-3.3.3\bin"
Execute following command

 mvn install:install-file -Dfile=C:\oraclexe\app\oracle\product\10.2.0\server\jdbc\lib\ojdbc14_g.jar -DgroupId=com.oracle -DartifactId=ojdbc14_g -Dversion=10.2.0 -Dpackaging=jar   

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Error-JavaEE[Solved] : m2e Maven Dependency Plugin Install in Eclipse

Problem : Cannot complete the install because one or more required items could not be found.

Software being installed: m2e connector for the Maven Dependency Plugin 0.0.4.201410161303 (com.ianbrandt.tools.m2e.mdp.feature.feature.group 0.0.4.201410161303)

Missing requirement: m2e connector for Maven Dependency Plugin 0.0.4.201410161303 (com.ianbrandt.tools.m2e.mdp.core 0.0.4.201410161303) requires 'bundle org.eclipse.m2e.jdt 1.4.0' but it could not be found

 Cannot satisfy dependency:

 From: m2e connector for the Maven Dependency Plugin 0.0.4.201410161303 (com.ianbrandt.tools.m2e.mdp.feature.feature.group 0.0.4.201410161303)

 To: com.ianbrandt.tools.m2e.mdp.core [0.0.4.201410161303]

Solution : 
1. Start Eclipse IDE > Help > Install New Software
2. Paste site: http://download.eclipse.org/releases/indigo/  in Work with Textbox
3. Once the list loads, under "General Purpose Tools", check "m2e - Maven Integration for Eclipse ".

Continue Installation with Next

Click Finish

Wait For Completion of Installation.

NOTE : Sometimes it still shows error while installation with Eclipse Indigo
so if you are not still able to install it then download "eclipse-jee-luna-SR2-win32-x86_64" 
It already comes with m2e Maven dependency plugin.

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