The following article describes How does a JSP work.

The sequence of Events Describing How does a JSP work

When a JSP is accessed by a user’s web browser, the following steps occur.

  1. At first, The web server identifies the JSP file on the basis of the URL that the user requests.
  2. After that, the JSP container then translates the JSP file into a servlet class, which is a Java class that contains the logic for generating the dynamic content.
  3. Further, the Java Compiler compiles the servlet class into bytecode. Then, the Java Virtual Machine (JVM) executes the bytecode.
  4. When the user’s web browser requests the JSP file, the web server loads the servlet class into memory and executes the Java code contained within it.
  5. The Java code generates HTML output, which is sent back to the user’s web browser as an HTTP response.

Throughout this process, JSP tags insert Java code into the HTML page. These tags allow developers to perform a wide range of tasks, such as accessing databases, handling user input, and generating dynamic content based on user preferences or other factors.

JSPs also allow developers to include JavaBeans, which are Java classes that one can use to encapsulate complex logic or data. JavaBeans can be created separately from the JSP file and then included in the JSP using a special tag. This allows for more modular code and easier maintenance over time.

In summary, the JSP container translates JSPs into servlets. Then, they are compiled into bytecode and executed by the Java Virtual Machine to generate dynamic HTML output. JSP tags are used to insert Java code into the HTML page, and JavaBeans can be included to encapsulate complex logic or data.

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