HOW TO CREATE A POM

===============================PomS Start================================
<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.myproject.web</groupId>
<artifactId>myproject-web</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<name>myproject Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<java-version>1.7</java-version>
<org.springframework-version>3.2.6.RELEASE</org.springframework-version>
<spring.security.version>4.0.3.RELEASE</spring.security.version>
<junit-version>4.8</junit-version>
<org.aspectj-version>1.7.4</org.aspectj-version>
<org.slf4j-version>1.7.12</org.slf4j-version>
<jackson.databind-version>2.2.3</jackson.databind-version>
<catalina.home>D:/Servers/apache-tomcat-7.0.62</catalina.home>
</properties>
<dependencies>


<!-- Shiro -->
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-web</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-spring</artifactId>
<version>1.2.3</version>
</dependency>


<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
</dependency>

<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20151123</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>



<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework-version}</version>
</dependency>

<!-- Spring AOP -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${org.springframework-version}</version>
</dependency>

<!-- Spring security -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring.security.version}</version>
</dependency>

<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${org.aspectj-version}</version>
</dependency>

<!-- Logging -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
</exclusions>
</dependency>

<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>

<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>

<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit-version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${org.springframework-version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap-datepicker</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>angular-ui</artifactId>
<version>0.4.0-3</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>angularjs</artifactId>
<version>1.2.20</version>
</dependency>


<!-- Hybernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.6.10.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.0.Final</version>
</dependency>

<!-- Validation -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.1.3.Final</version>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.el</artifactId>
<version>2.2.4</version>
</dependency>

<!-- hsql -->
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>2.3.2</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>

<!-- File Upload -->

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<!-- <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.1</version>
</dependency> -->
<dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>1.3</version>
</dependency>


<!-- Common -->

<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.0.3</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.9</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-xc</artifactId>
<version>1.9.9</version>
</dependency>

<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.9.0.GA</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.5.2-M1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>1.3</version>
</dependency>



</dependencies>

<build>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<executions>
<execution>
<phase>test</phase>
<configuration>
<source>1.7</source>
<target>1.7</target>
<executable>${env.JAVA_HOME}/bin/javac</executable>
</configuration>
</execution>
</executions>
</plugin>
</plugins>

</build>
</project>

===============================PomS END================================

Fail maven.plugin

Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war (default-war) on project 

in pom.xml-->build -->plugins-->add plugin

<build>
<finalName>${project.artifactId}</finalName>

<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>

<plugin>

Spring load .property file and get

test.property [src/main/resource]
------------
#main
kk=directory/kk
main.wide=this/wide

----------spring

import java.io.InputStream;
import java.util.Properties;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;


@Component
@Scope("singleton")
public class PropertiesUtil {
private InputStream input;
private Properties properties ;


public PropertiesUtil() throws Exception{
properties=new Properties();
input = getClass().getClassLoader().getResourceAsStream(
"test.properties");
properties.load(input);
}
public String getProperty(String key){

return properties.getProperty(key);

};

}

HQL One to many join query

Enity Relation

 class Player {
      List<Item> inventory;
   }

   class Item {
      List<Enchantment> enchantments;
   }

   class Enchantment {
      boolean isSuperiorEnchantment;
   }

Select Query

select p
from Player as p
  left join p.inventory as i
  left join i.enchantments as e
where e.isSuperiorEnchantment = 1

MAVEN

•  Prepare Eclipse 

 project folder -->mvn eclipse:eclipse

• Normal Clean 

 project folder -->mvn clean;

• Normal Build

 project folder -->mvn install;

• Normal Clean and Build

 project folder -->mvn clean install;

SQL TABLE -MAPPING- FOREIGN KEY RELATION

CREATION & DROP

//Table-----------------Application---------
DROP TABLE IF EXISTS `myschema`.`application`;
CREATE TABLE  `myschema`.`application` (
 `APPLICATION_ID` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `APPLICATION_NAME` varchar(255) NOT NULL,
 `CREATED_AT` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY `APPLICATION_NAME` (`APPLICATION_NAME`),
  PRIMARY KEY (`APPLICATION_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;


//Table-----------------service-------------
DROP TABLE IF EXISTS `myschema`.`service`;
CREATE TABLE  `myschema`.`service` (
 `SERVICE_ID` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `SERVICE_NAME` varchar(255) NOT NULL,
 `CREATED_AT` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  UNIQUE KEY `SERVICE_NAME` (`SERVICE_NAME`),
  PRIMARY KEY (`SERVICE_ID`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;



//--Mapping Table------------App and Serv---

DROP TABLE IF EXISTS `myschema`.`service`;
CREATE TABLE `myschema`.`app_serv` (
  APPLICATION_ID int(11) unsigned NOT NULL,
  SERVICE_ID int(11) unsigned NOT NULL,
  SERV_ORDER int(11) DEFAULT NULL,
  PRIMARY KEY (APPLICATION_ID,SERVICE_ID),
  KEY FK_APP_ID (APPLICATION_ID),
  KEY FK_SER_ID (SERVICE_ID),
  CONSTRAINT FK_APP_ID FOREIGN KEY (APPLICATION_ID) REFERENCES application (APPLICATION_ID),
  CONSTRAINT FK_SER_ID FOREIGN KEY (SERVICE_ID) REFERENCES service (SERVICE_ID)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT & SELECT

//---insert---
INSERT INTO myschema.application(APPLICATION_NAME) VALUES ("my application");
INSERT INTO myschema.service(SERVICE_NAME) VALUES ("my service");

INSERT INTO myschema.app_serv(APPLICATION_ID,SERVICE_ID,SERV_ORDER) VALUES (1,1,1);

//---select----

SELECT * FROM myschema.application a;
SELECT * FROM myschema.service s;


SELECT * FROM myschema.app_serv ts;

Abstract class

1. class that is declared using “abstract” keyword; 
2. may or may not include abstract methods ( has no body)and concrete methods (methods with body) ;
3. we can  not allowed to create object of Abstract class,
4. An abstract class has no use until unless it is extended by some other class ,logic behind structuring inheritance property for project[animal-dog,cow].
5. it provides partial abstraction only,100% abstraction - interface.

See --

Interface , 

abstraction VS interface