In Spring Web MVC, we can use the @PathVariable annotation to access the captured URI variables. Table of contents: 1. Basic Mapping 2. Basic Mapping – Different Name 3. Basic Mapping – Class and method levels 4. Multiple Captured URI Variables 5. Multiple Captured URI Variables – Map Version 6. Regex Mapping 7. @PathVariable variables […]
I migrated from Spring 3 to Spring 5 and found out the WebMvcConfigurerAdapter class is deprecated; what should we do? SpringWebConfig.java package com.mkyong.helloworld.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; import org.springframework.web.servlet.view.InternalResourceViewResolver; import org.springframework.web.servlet.view.JstlView; @EnableWebMvc @Configuration @ComponentScan({ "com.mkyong.helloworld.web" }) public class SpringWebConfig extends WebMvcConfigurerAdapter { @Override public void addResourceHandlers(ResourceHandlerRegistry registry) […]
In the Spring framework, the @RequestBody annotation maps the web request’s body to the method’s parameter, usually a domain object or a Map. Table of contents 1. Spring @RequestBody example 2. Spring @RequestBody example – Map version 3. Download Source Code 4. References 1. Spring @RequestBody example Below is a @RequestBody example to map the […]
This article shows you what @Controller and @RestController are and their differences. Table of contents: 1. Spring @Controller annotation 2. Spring @RestController annotation 3. Download Source Code 4. References 1. Spring @Controller annotation Spring 2.5 introduced the @Controller as the web controller for the MVC architecture. Spring 3.0 introduced the @ResponseBody to return the method’s […]
In the Spring framework, the @ResponseBody annotation tells the Spring framework to write the method’s return type to the HTTP response body (not placed in a Model or interpreted as a view name). Spring 3.0 introduced the @ResponseBody annotation on the method level. Spring 4.0 enhanced the @ResponseBody annotation to put on the class level, […]
In this tutorial, we will show you how to use Maven to manage a Multi-module project containing four modules : Password module – Interface only. Password md5 module – Password module implementation, MD5 password hashing. Password sha module – Password module implementation, SHA password hashing. Web module – A simple MVC web app to hash […]
In Spring framework, you can @Autowired a HttpServletRequest in any Spring managed bean directly, and later get the client’s IP address from the request headers WebUtils.java package com.mkyong.web; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import javax.servlet.http.HttpServletRequest; @Component public class WebUtils { private HttpServletRequest request; @Autowired public void setRequest(HttpServletRequest request) { this.request = request; } private static String […]
In Spring MVC, just annotate a @Valid on the @RequestBody to fire the validation process. Note For complete source code, please refer to this – Spring Boot Ajax example P.S Tested with Spring Boot 1.5.1.RELEASE (Spring 4.3.6.RELEASE) 1. JSR 303 Validation Add JSR303 annotations on a bean. package com.mkyong.model; import org.hibernate.validator.constraints.NotBlank; public class SearchCriteria { […]
In Spring, you can declare a @ControllerAdvice to catch the ugly max upload size exceeded exception like this : Solution Depends the types of multipartResolver : StandardServletMultipartResolver – catch MultipartException, refer to this example. CommonsMultipartResolver – catch MaxUploadSizeExceededException – refer to this example. GlobalExceptionHandler.java package com.mkyong.exception; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.multipart.MaxUploadSizeExceededException; import org.springframework.web.multipart.MultipartException; import […]
This article will shows you how to use CommonsMultipartResolver to handle file upload in Spring MVC web application. Tools used : Spring 4.3.5.RELEASE commons-fileupload 1.3.2 Maven 3 Tomcat 7 or 8 and Jetty 8, 9 Note For StandardServletMultipartResolver – file upload using Servlet 3.0 multipart request parsing, please refer to this Spring MVC file upload […]
A Spring servlet initializer to configure the file upload limit, 5mb per file and 10mb per request. MyWebInitializer.java public class MyWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { private int maxUploadSizeInMb = 5 * 1024 * 1024; // 5 MB //… @Override protected void customizeRegistration(ServletRegistration.Dynamic registration) { // upload temp file will put here File uploadDirectory = new File(System.getProperty("java.io.tmpdir")); […]
In this tutorial, we will show you a Spring MVC + Mustache JS template web application example. Technologies used : Spring 4.2.4.RELEASE mustache.js JDK 1.8.0_66 Jackson 2.7 Eclipse 4.3 Tomcat 8 Maven 3 Bootstrap 3 Note This solution is still working, but recommend this simple Spring Boot + JMustache solution. In Spring, we can use […]
Review a jQuery Ajax form submit. $(document).ready(function () { $("#hostingForm").submit(function (e) { e.preventDefault(e); var data = {} data["id"] = $("#id").val(); data["domain"] = $("#domain").val(); data["name"] = $("#name").val(); //… $.ajax({ type: "POST", contentType: "application/json", url: "{{home}}/hosting/update", data: JSON.stringify(data), dataType: ‘json’, timeout: 600000, success: function (data) { console.log("SUCCESS: ", data); }, error: function (e) { console.log("ERROR: ", e); […]
Review the below @PathVariable example. @RequestMapping("/site") public class SiteController { @RequestMapping(value = "/{q}", method = RequestMethod.GET) public ModelAndView display(@PathVariable("q") String q) { return getModelAndView(q, "site"); } } See the following cases : For input /site/google, q = google For input /site/google.com, q = google where is the .com? For input /site/google.com.my, q = google.com For […]
Reviewing a jQuery Ajax form POST and Spring MVC example, find out the following patterns : <script> jQuery(document).ready( function($) { $("#btn-save").click(function(event) { var id = $(‘#id’).val(); var domain = $(‘#domain’).val(); var name = $(‘#name’).val(); var desc = $(‘#desc’).val(); var tags = $(‘#tags’).val(); var afflink = $(‘#afflink’).val(); var cdn = $("#cdn").prop("checked") ? true : false; var […]
In this tutorial, we will show you how to create a Spring MVC web project and submit a form via Ajax. Technologies used : Spring 4.2.2.RELEASE Jackson 2.6.3 Logback 1.1.3 jQuery 1.10.2 Maven 3 JDK 1.8 Tomcat 8 or Jetty 9 Eclipse 4.5 Boostrap 3 P.S If the Jackson library is found in the project […]
Here’s the scenario, the controller returns a ModelAndView, and an exception is thrown while rendering the JSP view page, reason behind is one of message code is not found. org.apache.jasper.JasperException: org.springframework.context.NoSuchMessageException: No message found under code ‘Diff.userform.password’ for locale ‘en_US’. org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) An exception is thrown and render an HTTP 500 error […]
In a nutshell, a servlet filter lets you intercepts requests and responses on your web application. This article shows you how to register a servlet filter in Spring XML and JavaConfig. 1. Servlet Filter Review the following custom filter, it will catch any exceptions and redirect to an error page. package com.mkyong.form.web; import java.io.IOException; import […]
Spring examples to show you how to mix both Spring XML and JavaConfig together. 1. Load JavaConfig From Spring XML A Spring MVC example, uses @Configuration to load everything, and you want integrate with web.xml SpringWebConfig.java package com.mkyong.form.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; import org.springframework.web.servlet.view.InternalResourceViewResolver; import org.springframework.web.servlet.view.JstlView; @EnableWebMvc […]
In this article, we will show you few Spring form tag examples to check if a field has an error message. Review the following Spring MVC bean validation example : Technologies used : Spring 4 JSTL 1.2 //Bean validation import org.hibernate.validator.constraints.NotEmpty; public class User { @NotEmpty String name; //… } //Controller class @RequestMapping(value = "/users", […]
In this example, we will show you how to set active @Profile in a Spring MVC web application. @Profile Examples @Configuration public class AppConfig { @Profile("dev") @Bean public CacheManager cacheManager() { //… } @Profile("live") @Bean public EhCacheManagerFactoryBean ehCacheCacheManager() { //… } @Profile("testdb") @Bean public DataSource dataSource() { //… } } To set active @Profile in […]
In this tutorial, we will show you how to setup slf4j and logback in a Spring MVC web application. Technologies used : Spring 4.1.6.RELEASE Logback 1.1.3 Maven 3 or Gradle 2.0 Tomcat 7 Eclipse 4.4 Note By default, Spring is using the Jakarta Commons Logging API (JCL), read this. To setup logback framework you need […]
A Spring MVC web application, noticed all the Spring’s beans are loaded twice!? package com.mkyong.config.db; @Configuration public class MongoDevConfig { private final static Logger logger = LoggerFactory.getLogger(MongoDevConfig.class); @Bean MongoDbFactory mongoDbFactory() throws Exception { logger.debug("Init…… MongoDbFactory() in production mode!"); //… return new new SimpleMongoDbFactory(mongo, "db");; } } During Application startup : 2015-03-05 17:52:32 DEBUG c.m.config.MongoLiveConfig – […]
In this tutorial, we will show you how to use Ant build script to manage a Spring MVC web application project, create a WAR file and deploy to Tomcat. Technologies used : Eclipse 4.2 JDK 1.7 Ant 1.9.4 Ant-Ivy 2.4 logback 1.1.2 jstl 1.2 Spring 4.1.3.RELEASE Tomcat 7 1. Project Directory Review the final project […]
This tutorial shows you how to create a Spring Web MVC application with the Jakarta Server Pages (JSP; formerly JavaServer Pages) template. Technologies and tools used: Java 11 Spring 5.2.22.RELEASE JSP JSTL 1.2 Servlet API 4.0.1 Bootstrap 5.2.0 (webjars) IntelliJ IDEA Gradle 7.5.1 Gradle Gretty plugin 3.0.9 for embedded servlet containers (Tomcat 9 and Jetty […]
This example shows you how to get the HTTP request headers in Java. To get the HTTP request headers, you need this class HttpServletRequest : 1. HttpServletRequest Examples 1.1 Loop over the request header’s name and print out its value. WebUtils.java package com.mkyong.web.utils; import javax.servlet.http.HttpServletRequest; import java.util.Enumeration; import java.util.HashMap; import java.util.Map; public class WebUtils { […]
In this tutorial, we will show you how to include static resources like JavaScript or CSS in a JSP page. Summary steps : Put static resources like cs, js or images into this folder webapp\resources Create a Spring mvc:resources mapping Include in JSP page via JSTL tag c:url or Spring tag spring:url P.S This project […]
In this tutorial, we show you how to integrate jQuery autocomplete plugin with Spring MVC. Tools and Libraries used : Spring MVC 3.2 jQuery autocomplete plugin – github Maven 3 Eclipse IDE Review the tutorial’s flows : An HTML page, with a textbox. If the user is tying on the textbox, it will fire an […]
In this tutorial, we show you how to find a location using an IP address, with the following technologies : Spring MVC frameworks. jQuery (Ajax Request). GeoLite database. Google Map. Review the tutorial’s flows A page with a text input and button. Type an IP address, and clicks on the button. jQuery fires an Ajax […]
In this tutorial, we show you how to do exception handling in Spring MVC frameworks. Normally, we use @ExceptionHandler to decide which “view” should be returned back if certain exception is raised. P.S This @ExceptionHandler class is available since Spring 3.0 1. Project Structure Review the project directory structure, a standard Maven project. 2. Custom […]
In this tutorial, we show you how to print the List values via JSTL c:forEach tag. P.S This web project is using Spring MVC frameworks v3.2 1. Project Structure Review the project directory structure, a standard Maven project. 2. Project Dependencies Add Spring and JSTL libraries. pom.xml <properties> <spring.version>3.2.2.RELEASE</spring.version> <jstl.version>1.2</jstl.version> </properties> <dependencies> <!– jstl –> […]
Problem Developing a search form with the Spring MVC framework. /WEB-INF/pages/tools/webserver.jsp – Spring mvc + form tag <form:form method="post" commandName="searchForm" action="${pageContext.request.contextPath}/tools/webserver/" class="navbar-form pull-left" id="search-form"> Type a website : <form:input path="domainName" type="text" width="165px" placeholder="example – google.com" /> <button type="submit" class="btn btn-top-margin">Search</button> </form:form> Spring Controller @Controller @RequestMapping(value = "/tools", method = RequestMethod.GET) public class ToolsController { @RequestMapping(value […]
Problem See following Spring REST example, if a request such as “http://localhost:8080/site/google.com” is submitted, Spring returns “google“. Look like Spring treats “.” as file extension, and extract half of the parameter value. SiteController.java package com.mkyong.web.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller @RequestMapping("/site") public class SiteController { @RequestMapping(value = "/{domain}", method […]
Guide to create a web application with Maven, and add Spring MVC as web framework.
Note This tutorial is more on practice guide, please refer to this official Using JDO in datastore for detail explanation. See following code snippets to perform CRUD on GAE datastore, using Java Data Objects(JDO). Just annotate the Customer with JDO annotation and perform the CRUD via PersistenceManager. Add Customer c = new Customer(); c.setName(name); PersistenceManager […]
GAE datastore Refer to this official “Using datstore guide” to understand what is GAE datastore. See following code snippets to perform CRUD for Google App Engine datastore, Java, using low-level API. Add Store a customer into datastore, with “name” as the key. Key customerKey = KeyFactory.createKey("Customer", "your name"); Entity customer = new Entity("Customer", customerKey); customer.setProperty("name", […]
In this tutorial, we will show you how to develop and deploy a Spring 3.0 MVC REST web application in Google App Engine (GAE) environment. Tools and technologies used : Google App Engine Java SDK 1.6.3.1 Spring 3.1.1 JDK 1.6 Eclipse 3.7 + Google Plugin for Eclipse Note This example is going to reuse this […]
In Spring 3, old RequestMapping class is enhanced to support RESTful features, which makes Spring developers easier to develop REST services in Spring MVC. In this tutorial, we show you how to use Spring 3 MVC annotations to develop a RESTful style web application. 1. Project Directory Review the project folder structure. 2. Project Dependency […]
Spring 3, ContentNegotiatingViewResolver, is an interesting view resolver, which allow you to output a same resource (content or data) to different type of views like JSP, XML, RSS, JSON and etc. Put it simple, see following web requested URL, which will return in different views. https://mkyong.com/fruit/banana.rss , returned as RSS file. https://mkyong.com/fruit/banana.xml , returned as […]
In Spring 3, you can enable “mvc:annotation-driven” to support JSR303 bean validation via @Valid annotation, if any JSR 303 validator framework on the classpath. Note Hibernate Validator is the reference implementation for JSR 303 In this tutorial, we show you how to integrate Hibernate validator with Spring MVC, via @Valid annotation, to perform bean validation […]
