Jstl1. 2JarFileSpring MVC Interview Questions with Answers. These Spring MVC interview questions and answers have been written to help you prepare for the interviews and quickly revise the concepts in general. I will strongly suggest you to go deeper into each concept if you have extra time. The more you know, more you are confident. Table of Contents. What is Spring MVC framework What is Dispatcher. Servlet and Context. Loader. Listener What is the front controller class of Spring MVC How to use Java based configuration How can we use Spring to create Restful Web Service returning JSON response Can we have multiple Spring configuration filesDifference between lt context annotation config vs lt context component scan Difference between Component, Controller, Repository Service annotationsI had the opportunity to figure out how to do file uploads using Spring 3 the other day and I couldnt find anything that pulled it all together. What follows. Note In Spring MVC, the core dispatcher component is the DispatcherServlet, which act as the frontcontroller design pattern. Every web request has to go through. Now, lets see how to compile, create JAR and run this program using command line tools. Compile the program using javac command Open command prompt and move. As ace mentioned you will need the jstl. IdjstlltgroupId. What does the View. Resolver class What is a Multipart. Resolver and when its used How to upload file in Spring MVC Application How does Spring MVC provide validation support How to validate form data in Spring Web MVC FrameworkWhat is Spring MVC Interceptor and how to use it How to handle exceptions in Spring MVC Framework How to achieve localization in Spring MVC applications How to get Servlet. Can you just start your server without publishing your application, uising the startWeblogic. Jstl 1.2 Jar File' title='Jstl 1.2 Jar File' />Context and Servlet. Config object in a Spring Bean How to use Tomcat JNDI Data. Source in Spring Web ApplicationHow would you relate Spring MVC Framework to 3 tier architecture What is Spring MVC framework The Spring web MVC framework provides model view controller architecture and ready components that can be used to develop flexible and loosely coupled web applications. The MVC pattern results in separating the different aspects of the application input logic, business logic, and UI logic, while providing a loose coupling between model, view and controller parts of application. Spring framework provides lots of advantages over other MVC frameworks e. Clear separation of roles controller, validator, command object, form object, model object, Dispatcher. Servlet, 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 Java. Beans. Reusable business code no need for duplication. You can use existing business objects as command or form objects instead of mirroring them in order to extend a particular framework base class. Customizable binding and validation. Customizable handler mapping and view resolution. Customizable locale and theme resolution. A JSP form tag library, introduced in Spring 2. JSP pages much easier. What is Dispatcher. Servlet and Context. Loader. Listener Springs web MVC framework is, like many other web MVC frameworks, request driven, designed around a central Servlet that handles all the HTTP requests and responses. Springs Dispatcher. Servlet however, does more than just that. It is completely integrated with the Spring Io. C container so it allows you to use every feature that Spring has. After receiving an HTTP request, Dispatcher. Servlet consults the Handler. Mapping configuration files to call the appropriate Controller. The Controller takes the request and calls the appropriate service methods and set model data and then returns view name to the Dispatcher. Servlet. The Dispatcher. Servlet will take help from View. Resolver to pickup the defined view for the request. Once view is finalized, The Dispatcher. Servlet passes the model data to the view which is finally rendered on the browser. Archetype Created Web Applicationlt display name. Dispatcher. Servlet. By default, Dispatcher. Servlet loads its configuration file using lt servletname servlet. E. g. with above web. Dispatcher. Servlet will try to find spring servlet. Context. Loader. Listener reads the spring configuration file with value given against context. Config. Location in web. Dispatcher. Servlet. Config. Locationlt param name. WEB INFapplication. Context. xmllt param value. What is the front controller class of Spring MVC A front controller is defined as a controller which handles all requests for a Web Application. Dispatcher. Servlet actually a servlet is the front controller in Spring MVC that intercepts every request and then dispatchesforwards requests to an appropriate controller. When a web request is sent to a Spring MVC application, dispatcher servlet first receives the request. Then it organizes the different components configured in Springs web application context e. How to use Java based configurationTo configure java based MVC application, first add required dependencies. Spring MVC support. Id org. springframeworklt group. Id. lt artifact. Id spring webmvclt artifact. Id. lt version 4. RELEASElt version. Id org. springframeworklt group. Id. lt artifact. Id spring weblt artifact. Id. lt version 4. RELEASElt version. Tag libs support for view layer. Id javax. servletlt group. Id. lt artifact. Id jstllt artifact. Id. lt version 1. Id taglibslt group. Id. lt artifact. Id standardlt artifact. Id. lt version 1. Now add Dispatcher. Servlet entry in web. Dispatcher. Servlet only. Dispatcher. Servlet. Now add below entries in spring configuration file. Scan all classes in this path for spring specific annotations. Default. Annotation. Handler. Mapping. Annotation. Method. Handler. Adapter. Vierw resolver configuration. Internal. Resource. View. Resolver. WEB INFviews. Add controller code. Request. Mappingemployee module. Employee. Controller. Employee. Manager manager. Request. Mappingvalue get. All. Employees, method Request. Method. GET. public String get. All. EmployeesModel model. Attributeemployees, manager. All. Employees. List. Display. Additionally you should add manager and dao layer classes as well. Finally you add the jsp file to display the view. I will suggest to read above linked tutorial for complete understanding. Read More Spring MVC Hello World Example. How can we use Spring to create Restful Web Service returning JSON response For adding JSON support to your spring application, you will need to add Jackson dependency in first step. Jackson JSON Processor. Id com. fasterxml. Id. lt artifact. Id jackson databindlt artifact. Id. lt version 2. Now you are ready to return JSON response from your MVC controller. All you have to do is return JAXB annotated object from method and use Response. Body annotation on this return type. Employee. RESTController. Request. Mappingvalue employees. Response. Body Employee. List. VO get. All. Employees. Employee. List. VO employees new Employee. List. VO. Add employees. Alternatively, you can use Rest. Controller annotation in place of Controller annotation. This will remove the need to using Response. Body. Rest. Controller Controller Response. Body. So you can write the above controller as below. Rest. Controller. Employee. RESTController. Request. Mappingvalue employees. Employee. List. VO get. All. Employees. Employee. List. VO employees new Employee. List. VO. Add employees. Read More Spring REST Hello World JSON Example. Can we have multiple Spring configuration files YES. You can have multiple spring context files. There are two ways to make spring read and configure them. Specify all files in web. Config. Location init parameter. Dispatcher. Servlet. Config. Locationlt param name. Spring MVC hello world example. By mkyong July 2. Updated June 1. Viewed 8. In this tutorial, we will show you a Spring MVC hello world web application. Technologies used Spring 2. JDK 1. 6. Eclipse 3. Maven 3. 1. MVC Basic. In Spring MVC web application, it consists of 3 standard MVC Model, Views, Controller components Models Domain objects that are processed by the service layer business logic or persistent layer database operation. Views Display data, normally its a JSP page written with the Java Standard Tag Library JSTL. Controllers URL mapping and interact with service layer for business processing and return a Model. The following figures demonstrates how the Spring MVC web application handles a web request. Figure 1. 1 Image is copied from Spring MVC reference with slightly modified. Figure 1. 2 Image is copied from this book Spring Recipes. Note. In Spring MVC, the core dispatcher component is the Dispatcher. Servlet, which act as the front controller design pattern. Every web request has to go through this Dispatcher. Servlet, and the Dispatcher. Servlet will dispatch the web request to suitable handlers. Directory Structure. A standard Maven project directory structure. Maven. Declares the spring webmvc dependency, Maven will help you manage the transitive dependencies automatically download other dependencies that are required by spring webmvc, like spring context or spring beans. If you are using the JSP page with JSTL technology, include the jstl dependency also. POM4. 0. 0. xmlns xsihttp www. XMLSchema instance. Locationhttp maven. POM4. 0. 0. http maven. Version 4. 0. Version. Id com. mkyong. Id. Id spring. 2 mvc xml hello worldlt artifact. Id. lt packaging warlt packaging. SNAPSHOTlt version. Spring 2 MVClt name. Spring MVC framework. Id org. springframeworklt group. Id. lt artifact. Id spring webmvclt artifact. Id. lt version spring. JSTL. lt dependency. Id javax. servletlt group. Id. lt artifact. Id jstllt artifact. Id. lt version jstl. Id javax. servletlt group. Id. lt artifact. Id servlet apilt artifact. Id. lt version servletapi. Id org. apache. Id. Id maven compiler pluginlt artifact. Id. lt version 3. Id org. eclipse. Id. Id jetty maven pluginlt artifact. Id. lt version 9. Endwar Demo Pc. Interval. Seconds 1. Interval. Seconds. App. lt context. Path spring. Path. lt web. App. Eclipse workspace. Id org. apache. Id. Id maven eclipse pluginlt artifact. Id. lt version 2. Sources truelt download. Sources. lt download. Javadocs truelt download. Javadocs. lt wtpversion 2. Context. Name spring. Context. Name. Spring Controller. Spring comes with many Controllers, normally, you just need to extend the Abstract. Controller, and override the handle. Request. Internal method. Hello. World. Controller. Http. Servlet. Request. Http. Servlet. Response. Model. And. View. Abstract. Controller. Hello. World. Controller extends Abstract. Controller. protected Model. And. View handle. Request. InternalHttp. Servlet. Request request. Http. Servlet. Response response throws Exception. Model. And. View model new Model. And. ViewHello. World. Page. model. Objectmsg, hello world. Model. And. ViewHello. World. Page To identify which view should return back to the user, in this example Hello. World. Page. jsp will be returned. Objectmsg, hello world Add a hello world string into a model named msg, later you can use EL msg to display the hello world string. View JSP pageIn this case, view is a JSP page, you can display the value hello world that is stored in the model msg via expression language EL msg. Hello. World. Page. Spring MVC Hello World Examplelt h. If the msg is displayed as it is, not the value inside the msg model, it may caused by the old JSP 1. Spring XML Configuration. Declared the Spring Controller and view. Resolver. mvc dispatcher servlet. XMLSchema instance. Locationhttp www. Hello. World. Controller. Resolver. classorg. Internal. Resource. View. Resolver. WEB INFpageslt value. Controller Declared a bean name welcome. Hello. World. Controller. It means, if an URL with welcome. Hello. World. Controller controller will handle the request. Resolver Define how Spring will look for the view template. In this case, the controller Hello. World. Controller will return a view named Hello. World. Page, the view. Resolver will find the file with following mechanism prefix view name suffix, which is WEB INFpagesHello. World. Page. jsp. Note. Actually, you dont need to define the Bean. Name. Url. Handler. Mapping in the web. Dispatcher. Servlet will create a Bean. Name. Url. Handler. Mapping automatically. See this article Bean. Name. Url. Handler. Mapping example for detail. In web. xml, declared a Dispatcher. Servlet servlet to act as the front controller to handle all the entire web request which end with htm extension. Web. AppID version2. XMLSchema instance. Locationhttp java. Spring Web MVC Applicationlt display name. Dispatcher. Servlet. The mvc dispatcher is used to define which file to load the Spring XML configurations. By default, it will look for Spring XML configuration file by joining the servlet name mvc dispatcher with servlet. In this example, Spring will look for this file mvc dispatcher servlet. Demo. 7. 1 To run this project with Maven. To run this project in Eclipse IDE, create Eclipse project settings with the following Maven command. Imports the project manually and start with the server plugin. URL http localhost 8. How it works http localhost 8. URL is end with. Dispatcher. Servlet and send requests to the default Bean. Name. Url. Handler. Mapping. Bean. Name. Url. Handler. Mapping return Hello. World. Controller to the Dispatcher. Servlet. Dispatcher. Servlet forward request to the Hello. World. Controller. Hello. World. Controller process it and return a Model. And. View object, with view name Hello. World. Page. Dispatcher. Servlet received the Model. And. View and call the view. Resolver to process it. Resolver return the WEB INFpagesHello. World. Page. jsp back to the Dispatcher. Servlet. Dispatcher. Servlet return the Hello. World. Page. jsp back to the user. Download Source Code. References. Spring MVC documentation.