Podcast
Questions and Answers
What method is used to retrieve the input string in a JSP page?
What method is used to retrieve the input string in a JSP page?
- retrieveData()
- getInput()
- getRequest()
- getParameter() (correct)
Which of the following is NOT a role of directives in JSP?
Which of the following is NOT a role of directives in JSP?
- Define variables and methods (correct)
- Specify the content type and character encoding
- Provide general information to the JSP engine
- Import classes and packages
As of JSP 1.2, which scripting language is allowed for use in JSP pages?
As of JSP 1.2, which scripting language is allowed for use in JSP pages?
- Java (correct)
- Ruby
- Python
- JavaScript
What is one purpose of the directive that specifies whether the JSP page takes part in an HTTP session?
What is one purpose of the directive that specifies whether the JSP page takes part in an HTTP session?
What will be displayed if the current date is instantiated in a JSP page?
What will be displayed if the current date is instantiated in a JSP page?
Which directive allows the inclusion of another file's contents in a JSP page?
Which directive allows the inclusion of another file's contents in a JSP page?
Which scripting element is used to write Java code within a JSP page?
Which scripting element is used to write Java code within a JSP page?
What does the expression scripting element in JSP do?
What does the expression scripting element in JSP do?
What allows developers to generate both static and dynamic HTTP content in web development?
What allows developers to generate both static and dynamic HTTP content in web development?
Which aspect of JSP simplifies web application development?
Which aspect of JSP simplifies web application development?
What is a primary benefit of using JSP compared to Servlets?
What is a primary benefit of using JSP compared to Servlets?
How does JSP encourage team collaboration in web development?
How does JSP encourage team collaboration in web development?
Which statement explains the key difference between JSP and Servlets?
Which statement explains the key difference between JSP and Servlets?
What is one of the key features of Java Server Pages?
What is one of the key features of Java Server Pages?
What does the JSP life cycle primarily involve?
What does the JSP life cycle primarily involve?
In JSP, how does separation of content and display logic benefit developers?
In JSP, how does separation of content and display logic benefit developers?
What method is called when the start-tag of the Welcome custom tag is encountered?
What method is called when the start-tag of the Welcome custom tag is encountered?
What is the purpose of the prefix attribute in the taglib directive used in a JSP?
What is the purpose of the prefix attribute in the taglib directive used in a JSP?
What is the correct return type of the doStartTag() method in a custom tag implementation?
What is the correct return type of the doStartTag() method in a custom tag implementation?
Which expression is used in JSP 2.0 to access application data easily?
Which expression is used in JSP 2.0 to access application data easily?
In which file is the welcome tag defined and mapped to the handler class?
In which file is the welcome tag defined and mapped to the handler class?
What is the shorthand notation for accessing data using Expression Language (EL)?
What is the shorthand notation for accessing data using Expression Language (EL)?
What exception is thrown in the doStartTag() method if an error occurs?
What exception is thrown in the doStartTag() method if an error occurs?
Which class component is commonly accessed through Expression Language (EL) in JSP?
Which class component is commonly accessed through Expression Language (EL) in JSP?
What does the action attribute of the HTML form specify in the JSP example?
What does the action attribute of the HTML form specify in the JSP example?
Which directive is used in JSP to import all classes from the java.util package?
Which directive is used in JSP to import all classes from the java.util package?
What is the purpose of the declaration element in JSP?
What is the purpose of the declaration element in JSP?
What is the main difference between JSP comments and regular HTML comments?
What is the main difference between JSP comments and regular HTML comments?
Which JSP element is used to display the result of an expression in string format?
Which JSP element is used to display the result of an expression in string format?
What advantage does jsp:setProperty have over setXXX() methods?
What advantage does jsp:setProperty have over setXXX() methods?
Where can a JSP file be placed?
Where can a JSP file be placed?
What does the jsp:getProperty action element do?
What does the jsp:getProperty action element do?
What is the role of the submit button in the JSP example?
What is the role of the submit button in the JSP example?
Which JavaBean method is used to set the userName property?
Which JavaBean method is used to set the userName property?
What happens when a user submits the form with a username in the JSP example?
What happens when a user submits the form with a username in the JSP example?
What is the primary function of the jsp:plugin action?
What is the primary function of the jsp:plugin action?
What must be done to use jsp:getProperty in a JSP page?
What must be done to use jsp:getProperty in a JSP page?
How does the NameBean class initialize the userName property?
How does the NameBean class initialize the userName property?
What is the expected output when response.jsp retrieves the userName property?
What is the expected output when response.jsp retrieves the userName property?
What does the syntax of the jsp:plugin action include?
What does the syntax of the jsp:plugin action include?
What is the main focus of Java Server Pages (JSP)?
What is the main focus of Java Server Pages (JSP)?
Which of the following describes the role of the JSP engine?
Which of the following describes the role of the JSP engine?
What happens when a JSP page is requested for the first time?
What happens when a JSP page is requested for the first time?
Which feature introduced in JSP 2.0 simplifies web page authoring?
Which feature introduced in JSP 2.0 simplifies web page authoring?
How does the JSP life cycle relate to Servlet technology?
How does the JSP life cycle relate to Servlet technology?
What occurs if the JSP page has not been accessed before or has been modified?
What occurs if the JSP page has not been accessed before or has been modified?
Which web server implementation is a common example of a JSP engine?
Which web server implementation is a common example of a JSP engine?
What is one characteristic of custom tags in JSP?
What is one characteristic of custom tags in JSP?
Flashcards
JSP
JSP
A Java technology used to create dynamic web pages by embedding Java code within HTML. Think of it as a mixture of HTML & Java.
JSP Life Cycle
JSP Life Cycle
The sequence of events that occur when a JSP page is requested and processed by the server. It involves parsing, compiling, and executing the JSP code.
What is the purpose of JSP?
What is the purpose of JSP?
JSP provides a way to generate both static and dynamic HTML content for web applications. It allows you to work with server-side data and logic while also having a more structured way to write HTML compared to Servlets.
JSP Scripting Elements
JSP Scripting Elements
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JSP Standard Actions
JSP Standard Actions
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Custom Tags Library
Custom Tags Library
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Expression Language (EL)
Expression Language (EL)
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Why use JSP over Servlets?
Why use JSP over Servlets?
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What is JSP?
What is JSP?
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JSP and Servlets: Relationship
JSP and Servlets: Relationship
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JSP Engine's Role
JSP Engine's Role
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JSP's Purpose in Web Development
JSP's Purpose in Web Development
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What is JSP's life cycle?
What is JSP's life cycle?
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Why is the Servlet container needed for JSP?
Why is the Servlet container needed for JSP?
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How is JSP extensible?
How is JSP extensible?
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JSP Data Access
JSP Data Access
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JSP Directive Element
JSP Directive Element
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JSP Declaration Element
JSP Declaration Element
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JSP Expression Element
JSP Expression Element
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JSP Comment Scripting Element
JSP Comment Scripting Element
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JSP Regular HTML Comment
JSP Regular HTML Comment
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JSP Page Structure Directive (<%@ page %>)
JSP Page Structure Directive (<%@ page %>)
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JSP File Placement
JSP File Placement
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What is the purpose of the getParameter() method in JSP?
What is the purpose of the getParameter() method in JSP?
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What is a JSP scriptlet?
What is a JSP scriptlet?
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What is the purpose of JSP directives?
What is the purpose of JSP directives?
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What does the 'page' directive do?
What does the 'page' directive do?
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What is the 'include' directive used for?
What is the 'include' directive used for?
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What is a JSP declaration?
What is a JSP declaration?
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What are the main JSP scripting elements?
What are the main JSP scripting elements?
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Why is JSP important for web development?
Why is JSP important for web development?
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jsp:setProperty Action
jsp:setProperty Action
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jsp:getProperty Action
jsp:getProperty Action
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Why use jsp:setProperty over setXXX() methods?
Why use jsp:setProperty over setXXX() methods?
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How does jsp:plugin Action work?
How does jsp:plugin Action work?
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What is the purpose of jsp:plugin Action?
What is the purpose of jsp:plugin Action?
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How is jsp:plugin Action replaced in client HTML?
How is jsp:plugin Action replaced in client HTML?
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What is the role of NameBean in the example?
What is the role of NameBean in the example?
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How does the example demonstrate using jsp:getProperty?
How does the example demonstrate using jsp:getProperty?
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WelcomeTag.doStartTag()
WelcomeTag.doStartTag()
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JSP Tag Handler Class
JSP Tag Handler Class
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JSP Tag Library Descriptor (TLD)
JSP Tag Library Descriptor (TLD)
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JSP Tag Prefix
JSP Tag Prefix
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JSP Implicit Object: pageContext
JSP Implicit Object: pageContext
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JspWriter Object
JspWriter Object
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JSP Expression Language (EL)
JSP Expression Language (EL)
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JSP Tag Library Directive
JSP Tag Library Directive
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Study Notes
CSBP 461: Internet Computing: Java Server Pages (JSP)
- Course covers Java Server Pages (JSP) technology
- Objectives include introduction to JSP Web components, comparison with Servlets, presentation of the JSP life cycle, introduction to JSP scripting elements, discussion of JSP standard actions, and custom tags library, and introduction to the expression language.
- JSP technology allows creation of static and dynamic web pages.
- JSP pages are similar to regular HTML pages but contain embedded Java code for generating dynamic content.
- Simplest JSP page is an HTML page with a .jsp extension.
- A simple JSP page can display dynamic content such as the current time.
- Servlets are more complex than JSPs to author and use println statements to generate HTML pages
- JSP is easier to write and maintain HTML.
- JSP Benefits include separation of content and display logic, simplifies web application development, supports software reuse, automatic deployment, easier web page authoring, and platform independence.
- JSP can technically do everything servlets can do.
- JSP makes it easier to author HTML and maintain it.
- JSP allows use of standard HTML tools like DreamWeaver.
- JSP separates Java code that creates content from the HTML code that presents it.
- Most JSP pages embed Java code that is used to process server-side data and implement business logic, and JSP relies on Servlet container support to function.
- JSP engine translates the page into Java Servlet code and compiles into Servlet classes.
- JSP focuses on presenting data while other components focus on business logic processing.
- JSP 2.0 features include Expression Language (EL) for more consistent and easier Web development, and tag library extensibility.
- Many real-world websites (e.g., Travelocity, Walmart, Ask.com) use JSP/Servlet technology.
- The JSP life cycle involves parsing, compiling, loading, and execution of JSP code into a Servlet class by the web server in response to client requests
JSP Life Cycle
- JSP engine translates JSP page into a Java Servlet at runtime.
- The JSP life cycle is determined by Servlet technology.
- The JSP engine is a JSP specification implementation that comes with web servers implementing JSP (e.g. Tomcat).
- Client browser request to JSP page can come from another web component.
- Web server checks if the JSP page has been modified since its last access; if so, it regenerates the Servlet.
- The server translates the JSP page to a Java Servlet code, compiles the Servlet code to a class file, loads the Servlet class for execution, and returns the result.
JSP Syntax Elements
- Directives: control how JSP is translated.
- Declarations: declare variables and methods.
- Scriptlets: short blocks of Java code for program instructions.
- Expressions: evaluate expressions for display in the page
- Comments: used for documentation
JSP Standard Actions
- jsp:forward: redirects a request to another page (internal redirect).
- jsp:include: inserts the content of another file into the JSP page dynamically (run-time inclusion).
JSP JavaBean Components
- JavaBeans: reusable components for encapsulating business logic.
- jsp:useBean: creates or retrieves a reference to a JavaBean.
- jsp:setProperty: sets properties of a bean.
- jsp:getProperty: retrieves a property of a bean.
JSP 2.0 Expression Language (EL)
- Expression Language (EL): simplifies accessing data in JSP pages (shorthand notation).
- Accesses data from within the pageContext, request, session, and application.
Implicit Variables
- application: represents the application's context.
- config: used for getting JSP initialization parameters.
- page: used for getting JSP initialization parameters.
- session: represents the user's session.
- request: represents the current request.
Custom Tag Library
- Custom tags enhance code reusability by encapsulating Java code within a tag interface.
- Includes a tag library descriptor in XML format, a tag handler class file, and custom tags in JSP files.
jsp:plugin Action
- Used to include Java applets within a JSP page, handling client-side components.
JSP Implicit Variables (continued)
- Implicit variables are automatically generated by the JSP engine.
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Description
Test your knowledge about Java Server Pages (JSP) with this comprehensive quiz. This quiz covers various aspects of JSP, including its directives, scripting elements, and advantages over Servlets. Perfect for students and developers looking to solidify their understanding of JSP.