HIBERNATE IN JAVA

 Hibernate 

• HIBERNATE 
• ADVANTAGES 

The most popular object/relational persistence and query service available today is 

Hibernate, which is open source and distributed under the LGPL. Data retrieval and the 
mapping of Java classes to database tables are managed by the Hibernate framework. You 
may download Hibernate for free.
This thorough Hibernate tutorial guides users through the process of building 
database-driven web applications using the framework will be helpful to both novices and 
experienced developers. We cover a lot of territory, including database operations (both 
basic and sophisticated), Hibernate Query Language (HQL), mapping Java classes to database 
tables, and Hibernate settings.
What is the hibernate framework?
The Hibernate framework for Java is available for free and open-source download from the 
GNU Lesser General Public License (LGPL) website. Gavin King introduced Hibernate in 
2001 as a novel replacement for the EJB2-style entity bean. Connecting Java objects to 
database tables is one technique to simplify data retrieval and durability without the need 
for complex SQL queries. Hibernate streamlines and improves database interactions with its 
automatic event handling and caching features. It is therefore an essential basis for efficient 
data management in Java applications.

Advantages of hibernate 

The advantages of the Hibernate framework are:
1)     Open source and lightweight.
The lightweight and open-source Hibernate framework is licensed under the LGPL.
2)     Fast performance
The Hibernate framework operates rapidly because hibernation uses internal caching. 
The Hibernate framework uses two different types of caches: first-level and second-level. 
Level 1 caching is enabled by default.
3)     Database Independent Query
HQL stands for Hibernate Query Language, an object-oriented substitute for SQL. This 
program can produce queries for any database design. Thus, database searches are not required. 
Maintenance issues emerge because we have to modify the SQL query if we update the database 
for a project before it goes into hibernation.
4)     Automatic creation of tables
The Hibernate framework provides the ability to automatically create database tables. 
By using this method, you may skip the laborious process of manually constructing 
database tables.
5)     Simplifies complex joins
Retrieving data from multiple tables is easy at rest.
6)     Provides query statistics and database state
Hibernate supports query caching. and provides query and database state statistics.

SPRING MVC IN JAVA

Spring MVC

• WHAT IS SPRING 
• ADVANTAGES OF SPRING MVC FRAMEWORK

Based on Java, almost all web programs are created with the Spring MVC framework. It 

adheres to the Model-View-Controller (MVC) paradigm. This design pattern defines the three 

components of an application: the data model, presentation data, and control data.

Sending requests to handlers is the responsibility of a Dispatcher Servlet, which is an essential 

component of this design. Although Spring Boot Microservices is gaining traction in the 

industry, Spring MVC is still widely used in many projects. As a result, you must become 

familiar with Spring MVC's most recent version. That's why we will cover the spring MVC 

framework's components separately and methodically.

Spring Model-View-Controller

Model - The model has the application data. A single item or a group of linked items can 

make up a dataset.

Controller - A controller houses the business logic for the application. In this instance, a class 

is designated as a controller using the @Controller annotation.

View - A view represents the provided data in a predetermined format. The process of creating 

the view page often includes JSP+JSTL. However, a greater variety of view technologies, 

such as Free Marker, Thyme Leaf, and Apache Velocity, are compatible with Spring.

Front Controller - The "Dispatcher Servlet" class is the front controller in Spring Web MVC. 

Its responsibility is to oversee a Spring MVC application's execution.

Advantages of Spring MVC Framework

We'll go over a few advantages of the Spring MVC Framework below: In Spring MVC, each 
of the following roles is described by a distinct object: Model Object, Controller, Command 
Object, View Resolver, Dispatcher Servlet, Validator," and "Every Other Role.
Lightweight - It develops and deploys your application using a lightweight servlet.
Strong configuration - provides framework and application classes with strong configuration 
and easy access to a variety of contexts, such as web controls for validators and business 
objects. The development process is accelerated using Spring MVC, which allows for quick 
and parallel development.
Reusable business code - Allows you to use existing business objects instead of creating new 
objects.
Easy to test - In Spring, we usually create JavaBeans classes that allow you to enter a test. 
data with assignment methods.
Flexible mapping - It provides special annotations that easily recheck the page.

SPRING BOOT IN JAVA

 SPRING BOOT 

• WHAT IS SPRING BOOT
• ADVANTAGES OF SPRING BOOT 
• LIMITATIONS OF SPRING BOOT 
• SPRING BOOT PREREQUISITE 
• APPLICATION EVENT AND LISTENERS 

You will learn the fundamentals of the Spring Framework with this Spring Boot blog. Our 

Spring Boot blog may be useful for everyone, from total beginners to seasoned experts.
The Spring framework's RAD features are enabled by the Spring Boot module.
Our extensive Spring Boot course covers functions, projects, Maven, beginning project 
wizard, Spring Initializer, command line interface, applications, annotations, dependency 
management, properties, initializers, executor, JPA, JDBC, and more.

What is a spring boot? 

Among these projects, Spring Boot is based on the Spring Framework. Simple and web-
based programs may be installed, configured, and run with ease.
This Spring module enhances the Spring Framework with the ability to do Rapid Application 
Development (RAD). Creating standalone Spring-based apps is a breeze with its minimal 
Spring setup needed.
Spring Boot: how does it function? All things considered, Spring Boot is the offspring of 
Spring Framework and Embedded Servers.
With Spring Boot, you won't need to worry about XML configuration (deployment descriptor). 
By following the concept of convention rather than configuration in software architecture, it 
lessens the workload of developers.
Using Spring Initializer or the Spring STS IDE, you may create Spring Boot Java applications.
Why should we use Spring Boot Framework?
We ought to embrace the dependency injection technique since Spring Boot employs it.
It can easily handle database transactions because of its extensive features.
It is simpler to connect to other Java frameworks, such as JPA/Hibernate ORM, Struts, and others.
The application's development time and cost are both reduced.
A large number of other Spring sister projects, including the Spring Boot Framework, aid in
the creation of applications that satisfy the needs of modern enterprises. The sister projects 
listed below are scheduled for release in the spring:
Making Use of Spring Data Its simplified data access is advantageous for both relational and
NoSQL databases.
A powerful batch processing framework is Spring Batch.
Spring Security is a security framework that is used to provide robust protection for apps.
LinkedIn and other social networking sites may be integrated using the Spring Social 
framework.
Programs like Spring Integration make use of enterprise integration patterns. Small message 

and notification adapters make it simple to integrate with other corporate applications

Advantages of spring boot 

It produces Java jar files that may be used to run Spring apps on their own.
It tests web applications with ease using built-in HTTP servers such as Tomcat, Jetty, etc. We 
don't need to distribute WAR files.
It provides "initial POMs" that are fictitious and are meant to make Maven setup easier.
They are production-ready because they provide features like metrics, health checks, and 
external configuration.
XML does not require configuration.
The Spring Boot application may be built and tested using the command line interface (CLI) 
that is supplied.
It offers several more features.
It also lessens the need to create a great deal of generic code (i.e., code that has to be used 
everywhere with little modification) and XML definitions and annotations.
There is an increase in productivity. accelerate the process of development.

Limitations of Spring Boot

It's possible that the dependencies that Spring Boot uses are inappropriate for the application.
It means that the dependencies increase the size of the program.

Goals of Spring Boot

The primary goal of Spring Boot is to reduce the amount of time spent on development, unit 

testing, and integration testing.

provides a growth-oriented philosophical framework.

Don't be specific. further explanation of annotations

Replace fewer statements about imports.

Avoid interacting with the XML settings.

The characteristics that the Spring Boot Framework delivers or avoids result in less development 

effort, less developer effort, and more productivity.

Spring Boot Prerequisite

These steps must be followed to create a Spring Boot application. This course will 
make use of the Spring Tool Suite, or (STS) IDE.
Java 1.8Maven 3.0+Spring Framework 5.0.0.BUILD-SNAPSHOTIDE (Spring Tool Suite) is
recommended.
Spring Boot features
Web – Development
Spring-Application
Application Events and Listeners
Management Features
Exported Settings
Exported Files
YAML Support
Type-Safe Configuration
Writing
Security
Web Development
Build excellent web apps using this spring module. A standalone HTTP application may be 
easily created using pre-installed servers like Undertow, Tomcat, or Jetty. It is possible to 
utilize the spring-boot-starter-web web module to accelerate the program's startup.

Spring-Application

Using the Spring Application class is a simple way to invoke Spring Application. It is possible 
to start with the base technique. The static run() method is the only way we have to start the 
application.

Application Events and Listeners

Events are a useful tool that Spring Boot uses to carry out various tasks. With this approach, 
we can now create a factory file for adding listeners. We may access it via the Application Listener 
key.
Always create a factory file in the META-INF directory (e.g. META-INF/spring. Factories).

Admin support

Spring Boot allows you to enable administrator-related features for the application. Its main 
applications are in remote access and application management. To achieve that, we may use 
the "spring.application.admin.enabled" attribute in Spring Boot.

External Configuration

By removing the setup using Spring Boot, we may run the same application in several contexts. 
YAML files are used by the software to exclude configuration parameters.

Application Files

Spring Boot offers a wide range of functionality for applications. It may be included in the 
properties file for our project. A lot of attributes are defined in the properties file, such server
-port=8082. With its help, application features are arranged more efficiently.

YAML support

With its assistance, a hierarchical configuration may be established easily. This is a superset 
of JSON. Native support for Yaml is provided via the Spring Application class. Here, there 
are more options than using a properties file.

Type-safe configuration

Strongly type-safe configuration is intended for use in application administration and validation.
Configuring an application is always a crucial and secure task. We also have access to the 
annotations that are included with this library.

Logging

All internal protocols of Spring Boot follow the same convention. Registry dependencies are 
managed by the default option. It is not allowed to change protocol dependencies unless 
customization is required.

Security

We call this web application framework Spring Boot. Consequently, basic authentication is 
automatically applied to all HTTP endpoints. The plethora of readily available endpoints makes 
it simple to build a secure Spring Boot application.

Prerequisite

You must have a basic understanding of the Spring Framework before learning Spring Boot.

Audience

Our Spring Boot tutorials are designed to help beginners and professionals.  

Problem

We promise that you won't be disappointed with the Spring Boot Tutorial. However, please 
use the contact form to let us know about any errors you see.