Project facets problem arises when importing maven project into eclipse IDE

why project facets problem arises when importing maven project into eclipse IDE
and how to resolve it.

file>import>maven>existing maven project

rightclick on project>properties>project facets

uncheck java and dynamic web module

rightclick on project>maven>update poject

The best solution is to include plugin in to the POM before importing
Example:
<plugin>  <groupId>org.apache.maven.plugins</groupId>  <artifactId>maven-compiler-plugin</artifactId>  <version>2.1</version>  <configuration>    <source>1.8</source>    <target>1.8</target>  </configuration> </plugin>

which makes java 1.8 as facet.

Creating and running the maven as a stand alone application in windows

A.Installing  maven 
1.Download maven standalone package at https://maven.apache.org/download.cgi 
2.unzip on to a prefered location
3.copy the path of the bin say D:\installedSoft\apache-maven-3.3.9-bin\apache-maven-3.3.9\bin
4.create environment variable (USER variable) M2_HOME = D:\installedSoft\apache-maven-3.3.9-bin\apache-maven-3.3.9\bin
5.copy the M2_HOME user variable to the system variable  path=%M2_HOME%;

B.Install java JDK
1.create JAVA_HOME and copy to path

C. Check installation and run demo project
1. check the version by executing >> mvn --version in the command line
you should get:

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T22:11:4
7+05:30)
Maven home: D:\installedSoft\apache-maven-3.3.9-bin\apache-maven-3.3.9
Java version: 1.8.0_65, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_65\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows server 2008", version: "6.0", arch: "amd64", family: "dos"

2.Creating a Project by executing
>> mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

3.Build the Project
First change directory to the place where project is generated usually
>> CD C:\Users\Administrator\my-app
>> mvn package

Now that the maven has compiled and created the exucutable jar in the new target folder.

4.Run the application
>> java -cp target/my-app-1.0-SNAPSHOT.jar com.mycompany.app.App

OUTPUT:
Hello World!

How to setup a HTTPS server

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.

C:\Users\Administrator>cd %JAVA_HOME%

C:\Program Files\Java\jdk1.8.0_65>cd bin

C:\Program Files\Java\jdk1.8.0_65\bin>keytool -help
Key and Certificate Management Tool

Commands:

 -certreq            Generates a certificate request
 -changealias        Changes an entry's alias
 -delete             Deletes an entry
 -exportcert         Exports certificate
 -genkeypair         Generates a key pair
 -genseckey          Generates a secret key
 -gencert            Generates certificate from a certificate request
 -importcert         Imports a certificate or a certificate chain
 -importpass         Imports a password
 -importkeystore     Imports one or all entries from another keystore
 -keypasswd          Changes the key password of an entry
 -list               Lists entries in a keystore
 -printcert          Prints the content of a certificate
 -printcertreq       Prints the content of a certificate request
 -printcrl           Prints the content of a CRL file
 -storepasswd        Changes the store password of a keystore

Use "keytool -command_name -help" for usage of command_name

Generating own SSL RSA key using java keytool

C:\Program Files\Java\jdk1.8.0_65\bin>keytool -genkey -alias tomcat -keyalg RSA
Enter keystore password: abc@123
Re-enter new password: abc@123
What is your first and last name?
  [Unknown]:  raghavendra B A
What is the name of your organizational unit?
  [Unknown]:  srh
What is the name of your organization?
  [Unknown]:  srh
What is the name of your City or Locality?
  [Unknown]:  bangalore
What is the name of your State or Province?
  [Unknown]:  karnataka
What is the two-letter country code for this unit?
  [Unknown]:  in
Is CN=raghavendra B A, OU=srh, O=srh, L=bangalore, ST=karnataka, C=in correct?
  [no]:  yes

Enter key password for
        (RETURN if same as keystore password):

Output:
the file will be generated at the location C:\Users\Administrator as .keystore

If you want to specify the location and name during the process then use -keystore filename
example:
C:\Program Files\Java\jdk1.8.0_65\bin>keytool -genkey -alias tomcat -keyalg RSA
-keystore C:\Users\Administrator\Desktop\mykey

Apache Tomcat 8 configuration in server.xml

 <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
               maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" 
  keystoreFile="C:\Users\Administrator\Desktop\SRHSSLKey"
          keystorePass="baikadi@99"/>

Used https://www.opinionatedgeek.com/codecs/htmlencoder for encoding the above code snippet 

Checking the working of HTTPS

https://localhost:8443/