Develop Java MVC web apps using MyBatis, Servlets and JSP

Develop Java MVC web apps using MyBatis, Servlets and JSP | Udemy
English | Size: 4.14 GB
Genre: eLearning

What you’ll learn
Learn the basics of Mybatis
Understand SQL-Mappers
CURD operations using Mybatis
Build a DAO layer using Mybatis
Create a Java dynamic web application using Servlets
Differentiate between GenericServlet and HttpServlet
Understand servlet life cycle functions
Read and process HTTP request (query string) parameters
Understand different scopes – request, session and application
Generate different types of content (like .doc or .xls) based on user choice
Understand the JSP architecture
Understand JSP life cycle functions
Combine Servlet and JSP to handle a single HTTP request
Learn how JSP Custom tags work
Learn JSP Expression Language and JSP Standard Tag Libraries (JSTL)
Create a full fledged MVC application

Servlets and JSP

A Java servlet is a Java software component that extends the capabilities of a server. Although servlets can respond to many types of requests, they most commonly implement web containers for hosting web applications on web servers and thus qualify as a server-side servlet web API. Such web servlets are the Java counterpart to other dynamic web content technologies such as PHP and ASP.NET.

A Java servlet processes or stores a Java class in Java EE that conforms to the Java Servlet API, a standard for implementing Java classes that respond to requests. Servlets could in principle communicate over any client–server protocol, but they are most often used with HTTP. Thus “servlet” is often used as shorthand for “HTTP servlet”. Thus, a software developer may use a servlet to add dynamic content to a web server using the Java platform. The generated content is commonly HTML, but may be other data such as XML and more commonly, JSON. Servlets can maintain state in session variables across many server transactions by using HTTP cookies, or URL mapping.

To deploy and run a servlet, a web container must be used. A web container (also known as a servlet container) is essentially the component of a web server that interacts with the servlets. The web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access rights.

The Servlet API, contained in the Java package hierarchy javax.servlet, defines the expected interactions of the web container and a servlet.

Servlets can be generated automatically from JavaServer Pages (JSP) by the JavaServer Pages compiler. The difference between servlets and JSP is that servlets typically embed HTML inside Java code, while JSPs embed Java code in HTML. While the direct usage of servlets to generate HTML has become rare, the higher level MVC web framework in Java EE (JSF) still explicitly uses the servlet technology for the low level request/response handling via the FacesServlet. A somewhat older usage is to use servlets in conjunction with JSPs in a pattern called “Model 2”, which is a flavor of the model–view–controller.

MyBatis is a Java persistence framework that couples objects with stored procedures or SQL statements using an XML descriptor or annotations.

Apache MyBatis

MyBatis is free software that is distributed under the Apache License 2.0.

MyBatis is a fork of iBATIS 3.0 and is maintained by a team that includes the original creators of iBATIS.

Unlike ORM frameworks, MyBatis does not map Java objects to database tables but Java methods to SQL statements.

MyBatis lets you use all your database functionality like stored procedures, views, queries of any complexity and vendor proprietary features. It is often a good choice for legacy or de-normalized databases or to obtain full control of SQL execution.

It simplifies coding compared to JDBC. SQL statements are executed with a single line.

MyBatis provides a mapping engine that maps SQL results to object trees in a declarative way.

Who this course is for:
Core Java developers who want to learn about advanced concepts in Java
Web developers with Java knowledge who want to build powerful dynamic/interactive web applications
Developers from other programming background who want to explore MVC in Java

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