I am using thymeleaf on spring boot for web application development.
Maybe i have to make many (html) pages.
But thymeleaf doesn't seem to support partial rendering.
I want something like 'yield' in ruby on rails.
It looks like this is a question about views that share layouts using Thymeleaf. So the link that the OP shared in a comment is one way to handle it as a DIY solution. The Thymeleaf Layout Dialect is my preferred solution since it doesn't require me to write any code. Spring Boot makes it easy - just include "nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect" on your classpath. There's a sample in the Spring Boot codebase.
How about fragments in thymeleaf?
<body>
<div th:include="fragments/footer :: footer">...</div>
</body>
http://www.thymeleaf.org/doc/articles/layouts.html
Related
is there something similar to tags and tags in spring boot? I should make a following page:
I was considering to use SimpleFormController but it exists in Spring MVC. In my current project we are using spring boot + jsp (Now I am considering thymleaf, but I prefer to use jsp, we have already used it). May be you can give me some useful advice, in any way I will appreciate you for help.
I started my mvc experience with cakephp and I really enjoy it. So i would like to expand my knowledge with spring mvc. I have been searching online and all i got is confusion. So if possible I would like to know the prerequisite that you must know before using spring mvc.
Start with Spring Boot. There are many tutorials (also from Spring itself) and a good manual. Boot configures most of Spring MVC automatically for you, so that you can start experimenting with a real use case pretty quickly, with minimal config and boilerplate.
For simple websites you can look for Spring Boot + Thymeleaf tutorials, or even Spring + Angular, Vue or React if you like.
So I'm about to learn Spring MVC. But what I don't understand is why should I use Spring MVC if I can implement the MVC pattern using a single servlet conroller and JSPs? What advantages does Spring MVC provide over simple java MVC pattern?
Actually yes, you can do it. Question is if you should do it. Spring MVC gives you better organization of your code.
Pure MVC Frameworks like Spring MVC are obsolete today. When combined with templating engines like Thymeleaf, it lacks functionality and developers usually reinvent JSF. For single-page apps based on some popular JS frameworks that need REST backend, JAX-RS is way cleaner and better than Spring MVC REST.
So no, today you don't need Spring MVC and can stick with pure Java EE. For simple, toy-like applications where servlets are enough, you don't really need it but it may be better to use it. For anything serious, MVC is outdated and Spring has nothing to offer.
Edit 2017: Spring offers JAX-RS integration. However, it has several pitfalls, for example Spring won't automatically register classes annotated with #Path for you. Details can be found in Dzone Article
The best way to realize that it's better to play with these technologies for yourself, if you want to try spring MVC I recommend you start with spring boot because you can create projects with more agility without configuring xml files
Spring Boot
Some Features
Create stand-alone Spring applications
Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files)
Provide opinionated 'starter' POMs to simplify your Maven configuration
Automatically configure Spring whenever possible
Provide production-ready features such as metrics, health checks and
externalized configuration
Absolutely no code generation and no requirement for XML configuration
One of the ideas applied in Spring (not invented by Spring) is
Do not reinvent a wheel.
Having a single controller is not a good idea I'd say - breaking separation of concerns principle.
You can learn more about MVC from Spring documentation.
As blogged on spring.io both Spring 4.1 and Sprig Boot will integrate the new Groovy template engine (https://spring.io/blog/2014/05/28/using-the-innovative-groovy-template-engine-in-spring-boot, http://spring.io/blog/2014/07/28/spring-framework-4-1-spring-mvc-improvements).
I wonder the following:
Will Spring provide something like it does with the Spring Forms and Spring Security taglib?
If not what would be best to e.g. render form fields and more importantly form errors?
I think without it it will be a step back to develop a traditional Spring MVC webapp.
The template engine suports something like a BaseTemplate (see http://mrhaki.blogspot.nl/2014/08/groovy-goodness-use-custom-template.html) where it would be possible to provide custom methods to the template engine.
Related to this:
You can only provdide a single base template, so it will be difficult to include methods from multiple extension points. E.g. Spring Forms, Spring Security and multiple custom extensions like Fontawesome.
Is it possible to set the base template with Spring Boot?
A simple way to expose a lot of the spring specific attributes csrf etc... is to include spring.groovy.template.expose-request-attributes = true in your application.properties
I am a newbie in web development. I'm using servlets and JSP for web development.However, I've learnt lately that Spring Framework is apt for that which incorporate servlets, jsp etc. So, my question is that can I now run my program using Spring framework ? Like, I have 2 jsp codes, and 1 servlet class. So, how can I migrate the code in Spring Framework ? what additional things or codes do I need to maintain ?
Migrating an existing J2EE project is easy.
You will get rid of a lot of "boilerplate" code in the process. The easiest way to do it in my opinion will be to use SpringToolSuite.
Import your project in STS and then add "Maven" nature to it. In the pom configuration you can edit all the jars that you need and mention the spring framework. Once all this is setup it will be just a matter of minutes to change the code if it is small.
You can follow these video tutorials about maven and spring to learn about it.
JavaBrains
There are more tutorials by "New Circle training" on youtube for the same.
I would also recommend you to read Spring in action 3rd edition-Manning
This book is a must and the best way to learn spring framework. Hope this helps