Spring 3 MVC - Does Anything Just Work? Very Simple Use Case Not Working

Question

index.jsp

...
<h1> ${myobject} </h1>
...

HomeController.java

@RequestMapping(value = "/index")
public ModelAndView indexPath() {
    System.out.println("going home");
    return new ModelAndView("index", "myobject", "isastring");
}

Output:

going home

The <h1> on index doesn't show anything, how is this even possible? I absolutely cannot get my index.jsp to show this bean, I've tried using a usebean, I've tried storing it on the session, and now I'm directly placing it in the model. Nothing works. Spring 3 has been like every other spring release, intensely frustrating.

Answer 1

First off, ensure that the framework is in fact rendering the JSP you think it is. Add some other static content into the page and get that working first.

Print to System.err, or rather, use a logging framework.

Try SLF4J, it's almost universally understood.

Logger logger = LoggerFactory.getLogger(MyClass.class);
logger.info("going home");

Then, I have found it far easier to use conventions and annotations..

@RequestMapping(value = "/index")
public void index(ModelMap model) {
    System.err.println("going home");
    model.addAttribute("myobject", "isastring");
}

By convention the view that will be rendered will be the one resolved from the name "index", which is the same as your code above. This is because the method return type is void.

Adding a ModelMap into a @RequestMapping annotated method is supported and automatically provides you with a Model to populate.

Answer 2

The mistake made wasn't in the posted code, it was in the imports

import org.springframework.web.**portlet**.ModelAndView;

instead of this:

import org.springframework.web.**servlet**.ModelAndView;