Spring MVC and Thymeleaf

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In a typical Spring MVC application, @Controller classes are responsible for preparing a model map with data and selecting a view to be renered. This model map allows for the complete abstraction of the view technology and, in the case of Thymeleaf, it is transformed in to a Thymeleaf context object that makes all the defined variables available to expressions executed in templates.

Spring MVC calls the piece of data that can be accessed during the execution of views model attributes commonly referred to in Thymeleaf language as context variables.

There are several ways of adding model attributes to a view in Spring MVC:

1. Add attribute to Model via its addAttribute method.
2. Return ModelAndView with model attributes included.
3. Expose common attributes via methods annotated with @ModelAttribute

To access url parameters, there are also several methods.

1. Use the param. prefix.

1. Since parameters can be multivalued (e.g. https://example.com/query?q=Thymeleaf%20Is%20Great! &q=Really%3F) you may access them using brackets syntax

1. by using the special #request object that gives you direct access to the javax.servlet.http. HttpServletRequest object

Source

Rafat Borowiec