Various error during maven configuration with java spring

Q1- During project Creation or Maven Update or if Pom.xml showing any error or dependecy jar not loading then-

Solution:  Go to User Profile Foler =>.m2=>delete .lastupate.

if you unable to find User Profile folder then follow below steps-

1-Open folder by running this text (without Quotes) in Search Explorer of Window “%USERPROFILE%.m2”.
2-After running above command, “m2” folder of maven will open. Now search for file (without Quotes) “*.lastUpdated”.
3-In this step, delete all the files found by running Step 2.
4-Now go to Eclipse project and select “Maven | Update Dependency” or “Maven | Update Project”
5-If you still facing error then close eclipse and delete .m2 folder and try again.

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Q2- Could not transfer artifact org.apache.maven.plugins:maven-surefire-plugin:pom:2.7.1 from/to central
or
ArtifactTransferException: Could not transfer artifact
or
How to create settings.xml

Solution: Create settings.xml file in User Profile Foler =>.m2 folder.  ( if you are unable to fine user profile folder then see Q1 (above).

To create settings.xml file-> open notepad-> paste below code-> save as-> File Name- settings.xml. Save As Type- All and Save.

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
https://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>${user.home}/.m2/repository</localRepository>
<interactiveMode>true</interactiveMode>
<offline>false</offline>
</settings>

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Q3- tomcat:deploy: “Cannot invoke Tomcat manager: Connection refused”
Solution: Before deploying of project make sure following-
For tomcat7 or tomcat 8 do the following-

1- Project- pom.xml

<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.2</version>
    <configuration>
        <url>http://localhost:8080/manager/text</url>       
        <path>/projectName</path>
        <username>tomcat</username>
        <password>tomcat</password>
    </configuration>
</plugin>

2- TomcatDirectory\conf\ tomcat-users.xml: Add below line in  section

<role rolename="manager-gui"/>
  <role rolename="manager-status"/>
  <role rolename="manager-script"/>
  <role rolename="manager-jmx"/>
  <user username="tomcat" password="tomcat" roles="manger-gui,manager-status,manager-script,manager-jmx"/>

it will show like this-

Now run project and deploy it (Right Click on project=>Run as=>Run Configuration)

Gole:- clean install tomcat7:deploy   (For first time deployment) and for next time use clean install tomcat7:redeploy. 

Profile:-Leave Blank

Gole:-Default or path (if you have created settings.xml)