Introduction to the Rice Krad Web framework developed using the Java class library
Rice Krad (Kuali Rapid Application Development) Web framework is a framework developed by the development of a fast and scalable web application developed by the Java class library.It is a open source project of Kuali Foundation, which aims to provide a highly customized solution for universities and research institutions.
Rice Krad provides many powerful and easy -to -use components to help developers quickly build rich user interfaces and functional web web applications.It uses the MVC (Model-View-Controller) design mode to separate the logic, data and display of the application, so that developers can better manage code and achieve better reuse.
In RICE KRAD, the view is presented as the KradView object, which uses the template engine in the Java class library to generate the HTML page.Developers can use various components (such as input fields, buttons, tables, and panels) to build views, and use some customized options to control their appearance and behavior.
The following is a simple example that demonstrates how to use Rice KRAD to create a simple login interface:
@Controller
@RequestMapping("/login")
public class LoginController {
@RequestMapping(method = RequestMethod.GET)
public String showLoginForm(Model model) {
model.addAttribute("loginForm", new LoginForm());
return "loginForm";
}
@RequestMapping(method = RequestMethod.POST)
public String processLoginForm(@ModelAttribute("loginForm") LoginForm loginForm) {
if (loginForm.getUsername().equals("admin") && loginForm.getPassword().equals("password")) {
return "redirect:/dashboard";
} else {
return "redirect:/login?error";
}
}
}
In the above code, we first created a loginController class that uses @Controller to mark it.Then we define two processing methods for the GET request and post request of the login page.
In the processing method of get request, we created a loginform object and added it to the model.Then, we returned a view name called "Loginform", which will find the corresponding template file in the view parser.
In the processing method of post request, we obtained the login information submitted through the form and conducted the corresponding operation according to the verification results of the login information.If the verification is passed, we will redirect the user to the dashboard page; if the verification fails, we will redirect the user back to the login page and pass a error parameter.
This is just a simple example that illustrates the use of Rice Krad.In fact, Rice KRAD also provides many other functions, such as form verification, data binding, and cross -browser compatibility.Using Rice Krad, developers can more efficiently build excellent web applications and reduce coding workload.
