Introduction to JSP

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JSP stands for JavaServer Pages is a Java standard technology that enables you to write dynamic, data-driven pages for your Java web applications. 

  • It is a server side technology.
  • In this JSP tags are used to insert JAVA code into HTML pages.
  • It is an advanced version of Servlet Technology.
  • It is a Web based technology helps us to create dynamic and platform independent web pages.
  • In this, Java code can be inserted in HTML/ XML pages or both.
  • JSP is first converted into servlet by JSP container before processing the client’s request.

Servlet vs JSP

ServletJSP
Need to create a classNo need to create a class
Inherit HttpServlet classNo need to inherit any class
Override appropriate method No need to override any method
Need Web.xml file No Need Web.xml file
After manipulation need to recompilation or redeployment.No need to compile
After manipulation need to restart the serverNo reed to restart the server
Servlet vs JSP

Features of JSP

  • Coding in JSP is easy :- As it is just adding JAVA code to HTML/XML.
  • Reduction in the length of Code :- In JSP we use action tags, custom tags etc.
  • Connection to Database is easier :-It is easier to connect website to database and allows to read or write data easily to the database.
  • Make Interactive websites :- In this we can create dynamic web pages which helps user to interact in real time environment.
  • Portable, Powerful, flexible and easy to maintain :- as these are browser and server independent.
  • No Redeployment and No Re-Compilation :- It is dynamic, secure and platform independent so no need to re-compilation.
  • Extension to Servlet :- as it has all features of servlets, implicit objects and custom tags.

Advantages of using JSP

  • It does not require advanced knowledge of JAVA
  • It is capable of handling exceptions
  • Easy to use and learn
  • It can tags which are easy to use and understand
  • Implicit objects are there which reduces the length of code
  • It is suitable for both JAVA and non JAVA programmer

Disadvantages of using JSP

  • Difficult to debug for errors.
  • First time access leads to wastage of time
  • It’s output is HTML which lacks features.
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