Servlet11
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The document summarizes key concepts related to servlets including: 1) Servlets extend HttpServlet and implement init(), service(), and destroy() methods to handle requests and responses. Servlet instances are managed by the web container. 2) Servlet configuration allows initializing servlets through parameters defined in web.xml. The ServletConfig object provides access to these parameters. 3) Servlets communicate with clients via HttpServletRequest and HttpServletResponse objects, sending responses using getWriter() or getOutputStream(). Redirects use sendRedirect().
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Java Servlet Programming under Ubuntu Linux by Tushar B Kute
The document provides information on programming simple servlets under Ubuntu GNU/Linux. It discusses what can be built with servlets, the benefits of servlets over CGI, definitions of servlet containers and servlet architecture. It also covers the servlet lifecycle, request and response objects, and the steps to write a simple servlet class, compile it, deploy it on Tomcat, and run it.
Servlet lifecycle
The servlet lifecycle consists of four main steps:
1) Loading and instantiation where the servlet class is loaded and an instance is created.
2) Initialization where the init() method is called to perform initialization.
3) Request handling where the service() method handles client requests.
4) End of service where the destroy() method is called before the servlet is removed from service to clean up resources.
The main lifecycle methods are init(), service(), and destroy(). The init() method performs initialization, service() handles requests, and destroy() performs cleanup before removal.
SCWCD 2. servlet req - resp (cap3 - cap4)
1. The document discusses objectives and concepts related to building web applications using servlets, including HTTP methods, the request and response objects, the servlet lifecycle, initialization parameters, and redirecting versus forwarding requests.
2. It provides examples of servlet configuration in web.xml and describes how the container processes requests and maps them to servlets.
3. Key aspects of the request and response objects are outlined, such as accessing headers, cookies, and input/output streams.
JAVA Servlets
This document provides information on servlets including:
- Servlets allow dynamic content and interaction for web applications and can be used to build search engines, e-commerce sites, and more.
- Servlets have better performance than CGI since they remain loaded in memory between requests rather than starting a new process for each request.
- Servlets follow a request-response lifecycle and provide APIs to handle HTTP requests and responses through the Servlet, HttpServletRequest, and HttpServletResponse interfaces.
Http Server Programming in JAVA - Handling http requests and responses
This ppt contains HTML forms and CGI; HTTP; Servlet Programming; The Life Cycle of a
Servlet; Using Tomcat for Servlet Development; A simple Servlet;
deployment of simple servlets, web server (Java web server / Tomcat/ Web
logic) The Servlet API; The Javax.servlet Package; Reading Servlet
Parameter; The Javax.servlet.http package; Handling HTTP Requests and
Responses, HTTP GET and POST methods, Using Cookies; Session
Tracking
Integrating Servlets and JSP (The MVC Architecture)
This document discusses integrating servlets and JSP using the MVC architecture. It begins with an introduction to the MVC pattern, explaining the model, view, and controller components. It then covers advantages of MVC like separation of concerns and reusability. Next, it describes how MVC applies to servlets, with the servlet acting as controller and JSP as view. It explains how the web deployment descriptor (web.xml) provides initialization parameters and how servlets can forward requests to JSP. Finally, it discusses attributes, threading safety, and accessing initialization parameters from JSP.
Servlet
This document discusses servlets in Java. It defines servlets as Java classes that extend capabilities of servers by responding to requests. Servlets can process or store submitted data, provide dynamic content like database results, and manage state information in HTTP. The document outlines the servlet lifecycle and different servlet classes like GenericServlet and HttpServlet. It also describes servlet request and response objects and common methods used to access client information and send responses.
Web Technologies -- Servlets 4 unit slides
The document describes servlets and how they work. It includes:
- An overview of servlets, including the servlet interface, life cycle, and HttpServlet class for handling HTTP requests
- Explanation of how servlets receive and respond to HTTP requests through the HttpServletRequest and HttpServletResponse interfaces
- An example servlet called WelcomeServlet that handles GET requests and generates an XHTML response page to demonstrate servlet basics
Servlet
Servlets are Java classes that extend the functionality of a web server by dynamically generating web pages. Servlets use the Java programming language and are managed by a servlet container that handles loading, unloading, and directing requests. Servlets provide advantages over older technologies like CGI scripts such as better performance, portability, security, and access to full Java features. The basic servlet lifecycle involves initialization, handling requests, and destruction. Servlets can be generic or HTTP-specific, with HTTP servlets providing specialized methods for different HTTP request types. Sessions allow servlets to maintain state across multiple requests.
servlet 2.5 & JSP 2.0
The document provides an introduction to using Servlets and JSPs to build dynamic web applications. It discusses the web application architecture and how requests are handled by the container. Servlets are Java classes that handle requests and responses, while JSPs simplify creating dynamic web pages by mixing HTML with Java code. The document outlines the servlet lifecycle and the differences between GET and POST requests. It also discusses how to retrieve and set request and response parameters, headers, and attributes to communicate between the client and server.
Servlet ppt by vikas jagtap
Server side programs can be written using different server-side technologies , such as Common Gateway Interface (CGI) , Active Server Pages (ASP) and Servlets.
CGI scripts are written in C , C++ or perl programming languages .
In case of an application server using CGI script to process client request , the server creates a separate instance of the CGI script to process the request.
As a result, the efficiency of the server is affected when there is large number of concurrent requests.
S E R V L E T S
Servlets are Java classes that extend functionality of a server. Servlets execute on a Java-enabled server and dynamically extend the server's functionality. Servlets process requests from clients and return results, usually in HTML form. All servlets extend classes like GenericServlet or HttpServlet and override the service() method to implement custom functionality that is called in response to client requests. Servlets also implement init() and destroy() methods for initialization and resource cleanup.
Basics Of Servlet
Servlet is just a java program which is present on server side.
It helps to handle dynamic request from web server.
Servlets intro
Servlets are Java programs that run on a web server and generate dynamic web page content. Servlets receive HTTP requests and return HTTP responses. They provide an interface between web clients and web servers. Key points:
- Servlets run on web servers like Tomcat and handle HTTP requests/responses dynamically.
- They extend the HttpServlet class and implement doGet() and/or doPost() methods to process requests.
- Servlets can access request parameters, headers, cookies and generate HTML responses by setting headers and writing to the response.
- Servlets are configured in the web server and mapped to URLs to handle requests for those URLs dynamically.
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Java Servlet Programming under Ubuntu Linux by Tushar B Kute
Java Servlet Programming under Ubuntu Linux by Tushar B Kute
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Http Server Programming in JAVA - Handling http requests and responses
Integrating Servlets and JSP (The MVC Architecture)
Integrating Servlets and JSP (The MVC Architecture)
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The document describes how to create a simple web service in Java that returns a greeting message, and then how to test and consume the web service using a client. Key steps include:
1. Creating a Java class with the @WebService annotation to expose a "sayHello" method.
2. Deploying and testing the web service by invoking the "sayHello" method and viewing the request/response messages.
3. Generating a WSDL file from the web service.
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Web Services Part 1
The document provides an introduction to web services, including their origins, characteristics, life cycle, requirements, and advantages/disadvantages. It discusses how web services use XML, SOAP, WSDL, and UDDI to allow programs to communicate over the web. The document also introduces XML, describing its structure, elements, attributes, and validation using DTDs.
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This document provides an introduction and overview of Struts, an MVC framework for Java web applications. It discusses Struts' main components and design patterns, including:
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- The framework has 3 main components - Controller, View, and Model.
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Session Management
Sessions allow storing client-specific data across multiple HTTP requests. The container generates a unique session ID and sends it back to the client via a cookie. The client then sends the session ID back to the container with each subsequent request, allowing the container to identify the client and associate the appropriate session data. Cookies are commonly used to exchange the session ID between the client and container in a stateless HTTP environment.
Struts Java I I Lecture 8
Struts is a framework that aims to solve issues with repetitive code in JSP applications. It is based on the MVC pattern and moves code into XML configuration files. The key components are the ActionServlet, which controls navigation; ActionForms, which collect form data; ActionMappings, which help determine where requests are sent; and Action classes, which contain business logic and return ActionForwards to determine the next steps.
Sping Slide 6
The document discusses various ways to define and configure collection properties in Spring, including using tags like <list>, <set>, and <map> to define collections for bean properties. It also describes defining concrete collection classes using factory beans or the utility schema, specifying data types for collection elements, and merging collections from a parent bean.
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The document discusses application-managed entity managers in Java applications. Application-managed entity managers allow Java applications like Swing programs to use JPA for persistence without requiring an EJB container. These applications manage the entity manager lifecycle directly and typically use resource-local transactions instead of JTA transactions. The document provides an example Java application that creates an entity manager factory, performs transactions to add and retrieve an entity, and closes resources.
Ejb6
The document discusses application-managed entity managers in Java applications. Application-managed entity managers allow Java applications like Swing programs to use JPA for persistence without requiring an EJB container. These applications manage the entity manager lifecycle directly and typically use resource-local transactions instead of JTA transactions. The document provides an example Java application that creates an entity manager factory, performs transactions to add and retrieve an entity, and closes resources.
Ejb5
The document provides an overview of the Java Persistence Query Language (JPQL) which is used to query entities and relationships in Java Persistence API (JPA). It describes JPQL features such as projections, joins, aggregation, subqueries, functions and more. Examples are given for each feature to illustrate how to write and execute JPQL queries on entities.
Ejb4
The document discusses object-relational mapping and describes the default mappings for various entity relationships like one-to-one, one-to-many, and many-to-many. It provides an example of mapping a banking domain model with Customer, Account, Address, and Referee entities to a relational database using JPA annotations and default conventions.
Patni Hibernate
Hibernate is an object-relational mapping tool that allows developers to work with relational data (like SQL databases) using object-oriented programming languages like Java. It eliminates manual data handling code by directly mapping Java objects to database tables. This reduces development time and effort. Hibernate configuration involves setting up XML mapping files that describe how Java classes and their fields are mapped to database tables and columns. It provides a simpler object-oriented approach for handling data persistence tasks versus direct SQL/JDBC coding.
Spring Transaction
The document discusses transaction management in Spring. It describes Spring's capabilities for transaction management as an abstraction layer on top of different transaction APIs. It covers both programmatic and declarative transaction management in Spring and compares their advantages and disadvantages. It also discusses common problems with transaction management like data inconsistency and provides solutions using Spring's transaction manager API to manage transactions programmatically in a technology-independent way.
Webbasics
URI refers to Uniform Resource Identifiers, which include URLs and URNs used to identify resources on the web. URLs contain the protocol, host, path, and name to locate a resource using its network location. URIs are encoded to represent unsafe characters like spaces using percent encoding. Web browsers make HTTP requests to web servers, which respond by sending the requested pages back to the browser over the TCP protocol in a stateless manner according to the HTTP specification. HTML forms allow collecting user input on web pages for submission to servers via the GET or POST methods.
Internetbasics
This document provides an overview of basic internet concepts including:
1. Networks connect computers and devices to allow communication between them using wires, wireless connections, or other virtual mediums. Protocols define rules for communication at both low and high levels.
2. TCP/IP is a core internet protocol suite with 4 layers - network interface, internet, transport, and application - that handle communication from hardware to applications. IP addresses and ports identify devices and applications.
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Jsp
JSP (JavaServer Pages) and Servlets are complementary technologies for creating dynamic web pages using Java. While Servlets provide the foundation, JSPs make development easier by enabling standard HTML pages with Java tags, separating presentation from business logic. For example, a JSP page can contain a form that submits user input to Java code, which then outputs the values. Key advantages of JSPs over other methods are the separation of dynamic and static content for simpler development and maintenance, as well as platform independence since JSPs produce HTML and run on any server using Java.
Portlet
Portlets allow for aggregation and personalization of web content from different sources. Portlets produce fragments of markup that are combined into a portal page. A portlet container runs and manages the lifecycles of portlets. Portlets have request processing phases and modes that determine the functions and content they provide.
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Servlet11
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