Introduction to the Spring Framework:
Generar description
IoC container
Dependency Injection
Beans scope and lifecycle
Autowiring
XML and annotation based configuration
Additional features
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
Introduction to the Spring Framework:
Generar description
IoC container
Dependency Injection
Beans scope and lifecycle
Autowiring
XML and annotation based configuration
Additional features
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
In this Java Spring Training session, you will learn Spring – Inversion of Control, Dependency Injection and Bean definitions. Topics covered in this session are:
For more information, visit this link:
Spring Framework
• Core Container
• Data Access/Integration
• Web Layer
• Spring Setup
• Key features
• Spring Bean
• Dependency Injection
• Relation between DI and IoC
• Spring IoC Containers
• Spring DI
https://www.mindsmapped.com/courses/software-development/spring-fundamentals-learn-spring-framework-and-spring-boot/
Presentation explain about
Spring Boot vs Spring vs Spring MVC,
Advantages,
Where to start and how does Spring boot work ?,
Dependency Management,
Logging,
Exception Handling,
Database Handling.
in Spring boot.
This is a basic tutorial on Spring core.
Best viewed when animations and transitions are supported, e.g., view in MS Powerpoint. So, please try to view it with animation else the main purpose of this presentation will be defeated.
Welcome to presentation on Spring boot which is really great and relatively a new project from Spring.io. Its aim is to simplify creating new spring framework based projects and unify their configurations by applying some conventions. This convention over configuration is already successfully applied in so called modern web based frameworks like Grails, Django, Play framework, Rails etc.
Découvrez le framework web Spring Boot qui a la cote !
Apprenez comment son système d'auto-configuration fonctionne.
Live coding et exemple de migration vers Spring Boot sont de la partie.
University of Colorado PhD software engineering student Aaron Schram explains the details of creating a web applications using the Spring MVC framework
Une riche présentation de Mapping Objet Relationnel qui traite le standard JPA et l’implémentation Hibernate en les intégrant avec le frammework IOC spring.
Spring Data is a high level SpringSource project whose purpose is to unify and ease the access to different kinds of persistence stores, both relational database systems and NoSQL data stores.
In this Java Spring Training session, you will learn Spring – Inversion of Control, Dependency Injection and Bean definitions. Topics covered in this session are:
For more information, visit this link:
Spring Framework
• Core Container
• Data Access/Integration
• Web Layer
• Spring Setup
• Key features
• Spring Bean
• Dependency Injection
• Relation between DI and IoC
• Spring IoC Containers
• Spring DI
https://www.mindsmapped.com/courses/software-development/spring-fundamentals-learn-spring-framework-and-spring-boot/
Presentation explain about
Spring Boot vs Spring vs Spring MVC,
Advantages,
Where to start and how does Spring boot work ?,
Dependency Management,
Logging,
Exception Handling,
Database Handling.
in Spring boot.
This is a basic tutorial on Spring core.
Best viewed when animations and transitions are supported, e.g., view in MS Powerpoint. So, please try to view it with animation else the main purpose of this presentation will be defeated.
Welcome to presentation on Spring boot which is really great and relatively a new project from Spring.io. Its aim is to simplify creating new spring framework based projects and unify their configurations by applying some conventions. This convention over configuration is already successfully applied in so called modern web based frameworks like Grails, Django, Play framework, Rails etc.
Découvrez le framework web Spring Boot qui a la cote !
Apprenez comment son système d'auto-configuration fonctionne.
Live coding et exemple de migration vers Spring Boot sont de la partie.
University of Colorado PhD software engineering student Aaron Schram explains the details of creating a web applications using the Spring MVC framework
Une riche présentation de Mapping Objet Relationnel qui traite le standard JPA et l’implémentation Hibernate en les intégrant avec le frammework IOC spring.
Java Spring MVC Framework with AngularJS by Google and HTML5Tuna Tore
Course Description
#springframework, #spring, #udemy, #discount, #programming, #springmvc, spring, #udemycourse, #education
NEW udemy course related to the latest Java Spring MVC Framework 4 for developing WEB applications with popular and proven technologies such as AngularJS by Google and HTML5. (Lectures are divided in three main sections so you don't have to learn AngularJS Framework until you start the last section. The last section will teach you AngularJS by Google and the integration with Java Spring MVC Framework 4)
https://www.udemy.com/java-spring-mvc-framework-with-angularjs-by-google-and-html5
Moreover, this course is designed and created with the mindset of teaching you the latest web technologies in a short period of time with low training cost and high-quality content including real production quality code examples.
Therefore after attending this course, you will be ready to design and develop any commercial Java Spring MVC applications by learning the main principals, best practices, and most important concepts.
Furthermore, this is a fast track course and covers the most important concepts in AngularJS Framework, HTML5 and the latest Java Spring MVC Framework 4x with code examples and sample applications. You will be able to download source codes/slides/diagrams by attending this course and you can use those samples/codes in your applications as well. Therefore, it will be more than enough for you to develop Java Spring MVC applications if you attend this course.
The benefits of attending this udemy course are listed like as below;
You will earn a higher salary hence you will be able to use the latest and productive technologies and this course will also improve the way of your thinking in terms of programming by teaching you dependency injection principle used in Spring MVC and AngularJS
You will be more confident about commercial WEB programming for the following years and general programming concepts as well.
We will only use FREE Open Source Software tools during the development of components in this course.
You will learn the latest Java Spring MVC Framework with hands-on examples
You will learn the usage of AngularJS by Google for developing structured rich client side applications
You will understand the usage of latest useful basic HTML5 tags with code examples
You will gain experience of using CSS(Style Sheets) in web applications
Learn how to develop, test, run and debug Java Spring MVC applications
Learn how to integrate AngularJS with Java Spring MVC framework.
https://www.udemy.com/java-spring-mvc-framework-with-angularjs-by-google-and-html5
#springframework, #spring, #udemy, #discount, #programming, #springmvc, spring, #udemycourse, #education
Spring MVC 3.0 Framework
Objective:
1. Introduce Spring MVC Module
2. Learn about Spring MVC Components (Dispatcher, Handler mapping, Controller, View Resolver, View)
Slides:
1. What Is Spring?
2. Why use Spring?
3. By the way, just what is MVC?
4. MVC Architecture
5. Spring MVC Architecture
7. Spring MVC Components
8. DispatcherServlet
9. DispatcherServlet Architecture.........
.........................................................
This session will provide a complete tour of using the Spring MVC framework to build Java Portlets. It will include an in-depth review of a sample portlet application developed using the latest features of Spring MVC, including Annotation-based Controllers. If you are writing Portlets and using Spring, this session is for you.
We'll begin by discussing the unique differences and challenges when developing Portlets instead of traditional Servlet webapps. Then we'll talk about the unique approach that Spring MVC takes towards Portlets that fully leverages the Portlet lifecycle, instead of masking it like many other frameworks. We'll take an extensive tour of a sample application so we can see all the unique pieces of the framework in action. Finally we'll conclude with discussion of the upcoming support for the Portlet 2.0 (JSR 286) specification that will be part of Spring 3.0.
ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. ASP.NET Web API is an ideal platform for building RESTful applications on the .NET Framework.
A simple presentation to understand what is ASP.net MVC4 and its structure.It covers all important features of MVC4 and razor view engine including screenshots
The presentation provides overview of JAX-RS 2.0 and the cool new things that come with it. It also provides an introduction to OData which is a protocol proposed by Microsoft for data interchange.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
2. OUTLINE
Introduction to MVC Design Pattern
Configuring Spring in a Web application using Spring MVC
DispatcherServlet front controller
Defining Spring MVC controllers using annotations
Spring MVC in the view layer
Form rendering and type conversion
Form validation using Spring and Bean validation
HARSHIT CHOUDHARY
4. WHAT IS MVC?
Clearly separates business, navigation and presentation logic.
MVC is commonly used design pattern that can be applied to many different architectures like GUI, Web application
etc.
MVC suggests that the application is broken up as
Model
Manage the data of the application
The contract between the controller and the view
Contains the data needed to render the view
Populated by the controller
View
Renders the response to the request
Pulls data from the model
Defines how to present the data
Controller
Controllers are responsible for controlling the flow of application execution
They control the application logic and act as the coordinator between the View and Model.
The also perform application-wide tasks like validation, security and navigation
HARSHIT CHOUDHARY
5. SPRING WEB MVC
Spring creates a lightweight container that handles incoming HTTP requests by mapping them to
Controllers, which return a Model and View that produces the HTTP response.
It works around a single Front Controller 'DispatcherServlet' that dispatches requests to handlers,
with configurable handler mappings, view resolution, locale and theme resolution as well as
support for upload files.
Individual Controllers can be used to handle many different URLs.
Controllers are POJOs and are managed exactly like any other bean in the Spring
ApplicationContext.
HARSHIT CHOUDHARY
6. FEATURES OF SPRING WEB MVC
Clear separation of roles - controller, validator, command object, form object, model object,
DispatcherServlet, handler mapping, view resolver, etc. Each role can be fulfilled by a specialized
object.
• Powerful and straightforward configuration of both framework and application classes as
JavaBeans
Adaptability, non-intrusiveness, and flexibility. Define any controller method signature you need,
possibly using one of the parameter annotations such as @RequestParam, @RequestHeader,
@PathVariable, and more.
Reusable business code - no need for duplication.
Flexible in supporting different view types like JSP, Velocity, XML, PDF, OGNL etc
HARSHIT CHOUDHARY
7. FEATURES OF SPRING WEB MVC
Customizable binding and validation.
Customizable handler mapping and view resolution.
Flexible model transfer. Model transfer with a name/value Map supports easy integration with any view
technology.
Customizable locale and theme resolution, support for JSPs with or without Spring tag library, support for JSTL,
support for Velocity without the need for extra bridges, and so on.
A simple yet powerful JSP tag library known as the Spring tag library that provides support for features such as
data binding and themes.
A JSP form tag library, introduced in Spring 2.0, that makes writing forms in JSP pages much easier.
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9. DISPATCHERSERVLET CONTROLLER
The DispatcherServlet is the Spring Front Controller
It Initializes WebApplicationContext
Uses /WEB-INF/[servlet-name]-servlet.xml by default
WebApplicationContext is bound into ServletContext
HandlerMapping - Routing of requests to handlers
ViewResolver - Maps symbolic name to view
LocaleResolver - Default uses HTTP accept header, cookie, or session
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10. SPECIAL BEAN TYPES IN THE WEBAPPLICATIONCONTEXT
HARSHIT CHOUDHARY
Bean Type Explanation
HandlerMapping
Maps incoming requests to handlers and a list of pre- and post-processors (handler
interceptors) based on some criteria the details of which vary by HandlerMapping
implementation
HandlerAdapter
Helps the DispatcherServlet to invoke a handler mapped to a request regardless of
the handler is actually invoked.
HandlerExceptionResolver Maps exceptions to views also allowing for more complex exception handling code.
ViewResolver Resolves logical String-based view names to actual View types.
LocaleResolver
Resolves the locale a client is using, in order to be able to offer internationalized
views
ThemeResolver
Resolves themes your web application can use, for example, to offer personalized
layouts
MultipartResolver
Parses multi-part requests for example to support processing file uploads from
HTML forms.
11. LIFECYCLE OF SPRING MVC APPLICATION
1. Incoming HTTP request is mapped to the Spring DispatcherServlet.
2. The locale resolver is bound to the request to enable elements to resolve the locale to use.
3. The theme resolver is bound to the request to let elements such as views determine which theme to use.
4. If the request is in multiparts and there is a multipart file resolver is specified, the request is wrapped in a
MultipartHttpServletRequest for further processing by other elements in the process.
5. An appropriate handler is searched for. If a handler is found, the execution chain associated with the handler
(preprocessors, postprocessors, and controllers) is executed in order to prepare a model or rendering.
6. If a model is returned, the view is rendered, If no model is returned, no view is rendered.
HARSHIT CHOUDHARY
12. CONFIGURE SPRING WEB MVC IN CASE OF XML CONFIGURATION
Incoming HTTP request is mapped to the Spring DispatcherServlet.
Edit web.xml as below –
HARSHIT CHOUDHARY
<web-app>
<servlet>
<servlet-name>first</servlet-name>
<servlet-lass>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>first</servlet-name>
<url-pattern>*.spring</url-pattern>
</servlet-mapping>
</web-app>
13. CONFIGURE SPRING WEB MVC
The DispatcherServlet creates a container using the bean definitions found in the Servlet configuration
file.
The DispatcherServlet locates the configuration file using the naming convention <servletname>-
servlet.xml.
Create WEB-INFfirst-servlet.xml as below
HARSHIT CHOUDHARY
<mvc:annotation-driven/>
<context:component-scan base-package=“com.spring" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
15. ENABLING THE MVC JAVA CONFIG OR MVC NAMESPACE
To enable MVC Java Config
@EnableWebMVC
Used at @Configuration class
To achieve the same in XML
<mvc:annotation-driven>
HARSHIT CHOUDHARY
16. IMPLEMENTING CONTROLLERS
Controllers intercept user input and transform it into a model that is represented to the user by the
view.
Since 2.5, Controllers can be implemented using Annotations.
Two important annotations which are used are:
@Controller
@RequestMapping
Controllers implemented in this style do not have to extend specific base class or implement
specific interfaces.
HARSHIT CHOUDHARY
17. IMPLEMENTING CONTROLLER
@Controller annotation indicates that a
particular class serves the role of a controller
The dispatcher scans such annotated classes
for mapped methods and detects
@RequestMapping annotation.
The returned value need to be mapped as a
JSP page using the View Resolver
configuration.
HARSHIT CHOUDHARY
20. MAPPING REQUEST WITH @REQUESTMAPPING
@RequestMapping annotation can be used to map URLs onto an entire class or a particular
method.
Class-level annotation maps a specific request path on to the controller
Additional method-level annotations narrow down the primary mapping for a specific HTTP request
method (GET, POST etc) or an HTTP request parameter condition
HARSHIT CHOUDHARY
@Controller
@RequestMapping(“/order”)
Public class OrderController{
@RequestMapping(method=RequestMethod.GET)
Public List<Products> getProducts(){}
@RequestMapping(path=“/place”,
method=RequestMethod.POST)
public String placeOrder(){}
Request through Get method for
URL /order
Request through Post method for
URL /order/place
21. URI TEMPLATE PATTERNS
URI Template is a URI-like string, containing one or more variable names. When the values are substituted for these
variables, the template becomes a URI.
For ex,
http://www.example.com/users/{userId} – URI template containing variable userId
Providing value to the variable, it becomes a URI
http://www.example.com/users/Neelam
To bind the value of a URI template variable, @PathVariable annotation is used on a method argument
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@RequestMapping(“/orders/{orderId}”)
public String getOrder(@PathVariable String orderId, Model model){
Order order = OrderService.findOrder(orderId)
model.addAttribute(“order”,order);
return displayOrder;
}
Use of PathVariable Annotation
22. URI TEMPLATE PATTERNS
A method can have any number of @PathVariable annotations
A URI template can be assembled from type and method level @RequestMapping annotations
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@RequestMapping(“customer/{customeId}/orders/{orderId}”)
public String getOrder(@PathVariable String customerId, @PathVariable
String orderId, Model model){
}
@Controller
@RequestMapping(“/customer/{customerId}”)
Public class CustomerController{
@RequestMapping(“/orders/{orderId}”)
public String getOrder(@PathVariable String customerId, @PathVariable
String orderId, Model model){ }
}
23. URI TEMPLATE PATTERNS
@RequestMapping annotation supports the use of regular expression
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@RequestMapping("/spring-web/{symbolicName:[a-z-]+}-
{version:d.d.d}{extension:.[a-z]+}" )
public String getOrder(@PathVariable String version, @PathVariable String extension){
}
24. REQUEST PARAMS AND HEADER VALUES
Request Matching can also be narrowed down through request parameter conditions such as
“myParams”, “!myParams”, or “myParam=myValue”
The first two test for request parameter presence/absence and the third for a specific
parameter value
Example
The same can be done to test for request header presence/absence to match based on a
specific request header value
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@RequestMapping(path=“/customer”, params=“myParam=myValue”)
public String getCustomer(Model model){
}
@RequestMapping(path=“/customer”, headers=“myHeader=myValue”)
public String getCustomer(Model model){
}
25. DEFINING @REQUESTMAPPING HANDLER METHODS
@RequestMapping handler methods can have very flexible signatures.
It supports a long list of method arguments and return types, Commonly used arguments and return
types are described in next slides
Most arguments can be used in arbitrary order with the only exception being BindingResult arguments
(described later)
HARSHIT CHOUDHARY
26. SUPPORTED METHOD ARGUMENT TYPES
HARSHIT CHOUDHARY
Type Description
Request or Response
objects
Servlet API
Session Object An argument of this type enforces the presence of a corresponding
session
@PathVariable annotated parameters for access to URI template variables
@RequestParam annotated parameters for access to specific Servlet request
parameters
@RequestHeader annotated parameters for access to specific Servlet request HTTP
headers
@RequestBody annotated parameters for access to the HTTP request body
@RequestPart annotated parameters for access to the content of a
"multipart/form-data" request part
@SessionAttribute annotated parameters for access to existing, permanent session
attributes
27. SUPPORTED METHOD ARGUMENT TYPES
HARSHIT CHOUDHARY
Type Description
@RequestAttribute annotated parameters for access to request attributes.
ModelMap/Model for enriching the implicit model that is exposed to the web view.
@ModelAttribute temporarily stored in the session as part of a controller workflow
BindingResult validation results for a preceding command or form object
28. SUPPORTED METHOD RETURN TYPES
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Type Description
ModelAndView
object
ModelAndView can store the Model data and view name to be displayed
Model object Model object with view name implicitly determined
String Logical view name
Void If the method handle the response itself
View A view object
HttpHeaders To return a response with no body
30. DATA VALIDATIONS
Validation in Spring can be done in either of two ways
Using Validator Interface provided by Spring
Using Annotations
HARSHIT CHOUDHARY
31. VALIDATOR INTERFACE
Spring features a Validator interface that you can use to validate objects.
The Validator interface works using an Errors object so that while validating, validators can
report validation failures to the Errors object.
Data binding is useful for allowing user input to be dynamically bound to the domain model
of an application
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32. SPRING VALIDATION API
org.springframework.validation.Validator(Interface) - Validator for application-specific objects.
void validate(Object target,Errors errors)
org.springframework.validation.ValidationUtils(class) - Utility class convenient methods for
invoking a Validator and for rejecting empty fields.
static void rejectIfEmpty(Errors errors, String field, String errorCode)
static void rejectIfEmptyOrWhitespace(Errors errors, String field, String errorCode)
org.springframework.validationErrors(Interface) - Stores and exposes information about data-
binding and validation errors for a specific object.
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33. VALIDATIONS USING JSR303 (HIBERNATE)
JSR-303 standardizes validation constraint declaration and metadata for the Java platform.
This API is annotate domain model properties with declarative validation constraints and the runtime
enforces them.
There are a number of built-in constraints you can can take advantage of.
You may also define your own custom constraints.
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34. VALIDATIONS USING JSR303 (HIBERNATE)
Create bean class as below –
public class RegistrationBean {
@NotEmpty(message="Name field is mandatory.")
private String name = null;
@NotEmpty(message="Username field is mandatory.")
private String username = null;
@NotEmpty(message="Email field is mandatory.")
private String email = null;
@Length(max=10,min=10,message="Phone number is not valid. Should be of length 10.")
@NotEmpty(message="Phone field is mandatory.") @NumberFormat(style= Style.NUMBER)
private String phone;
@NotEmpty(message="Password should not be empty.")
private String password = null;
// all getter/setter
}
HARSHIT CHOUDHARY
36. MULTIPART(FILEUPLOAD) SUPPORT
Spring’s built-in multipart support handles file uploads in web applications
This support is enabled with MultipartResolver objects.
One MultipartResolver implementation is for use with Commons FileUpload
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37. USING A MULTIPART RESOLVER WITH COMMONS FILEUPLOAD
The jar file required for the same is commons-fileupload.jar
When DispatcherServlet detects a multi-part request, it activates the resolver and hands over the request
The resolver then wraps the current HttpServletRequest into a MultipartHttpServletRequest that supports multiple file uploads.
HARSHIT CHOUDHARY
39. HANDLING EXCEPTIONS
Implement interface – HandlerExceptionResolver
Allows to map Exceptions to specific views declaratively along with some optional Java logic code before
forwarding to these views
Use already provided implementation – SimpleMappingExceptionResolver
Enables to take the class name of any exception that might be thrown and map it to a view name.
Create @ExceptionHandler methods
Can be used on methods that should be invoked to handle an exception
These methods may be defined locally within an @Controller
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40. HANDLEREXCEPTIONRESOLVER
Any Spring Bean that implements HandlerExceptionResolver will be used to intercept and process any
exception raised in the MVC system and not handler by a Controller.
The handler refers to the controller that generated the exception
The interface can be implemented to set up our own custom exception handling system.
HARSHIT CHOUDHARY
41. SIMPLEMAPPINGEXCEPTIONRESOLVER
Convenient implementation of HandlerExceptionResolver. It provide options to:
Map exception class names to view names
Specify a default error page for any exception not handled anywhere else
Log a message (not enabled by default)
Set the name of the exception attribute to add to the Model so that it can be used inside a View.
Default name is ‘exception’
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43. @EXCEPTIONHANDLER
@ExceptionHandler methods can be added to the controllers to specifically handle
exceptions thrown by request handling methods in the same controller
Such methods can
Handle exceptions without @ResponseStatus annotation
Redirect the user to a dedicated error view
Build a totally custom error response
HARSHIT CHOUDHARY