JSP Standard Tag Library (JSTL)

What is JSTL ?

It is a standard library of custom tags. In other words, it is a collection of useful
JSP tags which  can remove scriplet code from a JSP page.

     According to their functionality,  these tags are classified into 5 groups.They are

•    Core Tags
•    Formatting Tags
•    SQL Tags
•    XML Tags
•    JSTL Functions

                                                   Before discussing on the above topics in detail, let us see how JSTL can be integrated with our existing project

How to integrate JSTL library in the project?

Maven

Step 1: Update pom

<dependency>     <groupid>javax.servlet</groupid>     <artifactid>jstl</artifactid>     <version>1.2</version>     <scope>runtime</scope> </dependency> <dependency>     <groupid>taglibs</groupid>     <artifactid>standard</artifactid>     <version>1.1.2</version>     <scope>runtime</scope> </dependency>

Step 2: Update viewClass

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>     <property name="prefix">         <value>/WEB-INF/jsp/</value>     </property>     <property name="suffix">         <value>.jsp</value>     </property> </bean>

Step 3: Use JSTL tags in .jsp file

<h1>Welcome message : <c:out value="${message}"></c:out></h1>

Eclipse

Step 1: Download JARs

Download jstl-1.2.jar (JSP 2.1 containers only i.e. Tomcat 6, otherwise jstl-1.1.jar) fromhttp://repo1.maven.org/maven2/javax/servlet/jstl/1.2/ 

• or
  the interfaces (javax.servlet.jsp.jstl-api-1.2.1.jar) fromhttp://search.maven.org/#browse|707331597 and the actual implementing classes (javax.servlet.jsp.jstl-1.2.2.jar) from http://search.maven.org/#browse%7C-1002239589.

Step 2: Copy JARs 

• Copy to your project's WEB-INF/lib directory

Step 3: Use JSTL tags in .jsp file

• Include the following tags in yours jsp's:
• <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
• <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
• <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

Different Groups in JSTL tag library

• Core Tags

• Formatting Tags

• SQL Tags       =>  provides tags required to interact with relational databases

• XML Tags  => provides ways to interact with XML data like parsing XML,  transforming                                 XML data etc.

• JSTL Functions  => most are common string manipulation functions

Benefits of usibg JSTL ?

Visual Paradigm

What is Visual Paradigm ?

                                      Visual Paradigm is a software tool that aids to modal business information systems and thereby manage the development process. It provides main industry based
                                            - modeling languages
                                            - modeling standards such as UML, SysML
                                            - complete tool set required for software development
                                              process


                       Above is a brief description about Visual Paradigm and let's talk in detail about its usage and importance

 Importance of Visual Paradigm

                 Knowing the business work flow and how the business operates from business analyst to the stakeholder in a particular business is an priority factor towards the development of that business.

 BPMN (Businesss Process Modal and Notation) is a standard that  will provide businesses with the capability of understanding their internal business procedures in a graphical notation. It also enables the organizations to communicate their procedures in standard manner.

              This standard is supported by Visual Paradigm.

 Other than the above standard below are poplar modeling languages supported by Visual Paradigm.
 
UML (Unified Modeling Language)  is the standard notation for modeling real world objects.That is essential in object oriented design approaches.
 https://en.wikipedia.org/wiki/Unified_Modeling_Language



SysML (Systems Modeling Language) is a dialect of UML. Especifically
supports the specification, analysis, design, verification and validation of a broad range of systems and systems-of-systems


 SoaML(Service Oriented Modeling Language)


                     Another outstanding feature of Visual Paradigm is its multi-language support ncluding English (default), German, Polish, Spanish, French, Czech, Simplified Chinese, Traditional Chinese, Japanese, Korean, etc. This enables a multilingual team to develop a  software peacefully.

Facility is provided in Visual Paradigm to develop your own modal with your own notations, add your own model validation rules, produce document by extracting data you need, etc.


To design a database in Visual Paradigm
https://www.visual-paradigm.com/tutorials/erd-to-redshift.jsp