[SpringMVC] Review something in Spring MVC project

1/ Some note:

- web.xml: listener, filter, dispatch Sevlet.
- [name]-servlet: bean.
- ModelAndView: Enable return view and model.
- Model: an interface, enable add model with attribute.
- ModelMap: and class , enable add model with attribute.

2/ How to using model and view (*.jsp):

- DTO:

private String name;

private String password;

private String salt;

private String username;

private Date createTime;

private Date updateTime;

- Controller

UserDto user = new UserDto();

user.setName("vuphan");

model.addAttribute("user", user);

- View:

        <div><h2> show user name: ${user.name}</h2></div>

3/ About Navigation:

- Show view: ex with page 'test.jsp'

 @RequestMapping(method = RequestMethod.GET)

public String reloadPage(ModelMap model) {

UserDto user = new UserDto();

user.setName("vuphan");

model.addAttribute("user", user);

model.addAttribute("user1", new UserDto());

return "test";

}

- Redirect to another page:

 return "redirect:/homeprofile/courses/teaching";

4/ CommandName is same ModelAttribute (from SpringMVC 4.2):

<form:form class="login-form" method="post" commandName="user1" action="${pageContext}/login/doLogin">

<div class="input">

<form:input class="input-username" type="text" required="true"  placeholder="Username" path="username"/>

<span><i class="fa fa-envelope-o"></i></span>

</div>

<div class="input">

<form:input class="input-password" type="password" placeholder="Password" required="true" path="password" />

<span><i class="fa fa-lock"></i></span>

</div>

<button class="btn btn-primary btn-lg btn-login" type="submit">GO</button>

</form:form>

5/ Pass Model to other Controller
Controller 1: 

@RequestMapping(value = "/doLogin")

public String demoPassModelToOtherViewController(Model model, @ModelAttribute("user1") UserDto a, final RedirectAttributes redirectAttributes) {

redirectAttributes.addFlashAttribute("user1", a);

return "redirect:/demoNext/show";

}

}

Controller 2:

@Controller

@RequestMapping("/demoNext")

public class TestNextController {

@RequestMapping(value = "/show", method = RequestMethod.GET)

public String reloadPage(ModelMap model, @ModelAttribute("user1") final Object userDto) {

model.addAttribute("user1", userDto);

return "test_next";

}

}