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Валидация данных при заполнении формы
#38955044
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Пытаюсь сделать валидацию данных при заполнении формы.
Если какое-то поле пустое, то страница заново загружается с сообщением какое поле пустое.
Создаю класс для валидации
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import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class CreateDTOForm {
@NotNull
private String name;
@NotNull
private String description;
@NotNull
private String links;
public CreateDTOForm() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getLinks() {
return links;
}
public void setLinks(String links) {
this.links = links;
}
}
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@Controller
public class CoursesController {
@RequestMapping(value = "/create", method = RequestMethod.GET)
public String createCourse(Model model, HttpSession session, HttpServletRequest request,UserService userService ,
@Valid CreateDTOForm userDto, BindingResult result ) {
model.addAttribute("eMail", session.getAttribute("eMail"));
User user = userService.read(session.getAttribute("name").toString());
if (user.getRole().equals("Lector"))
model.addAttribute("ActionCreate", "true");
else
model.addAttribute("ActionCreate", "false");
return "create";
}
}
@RequestMapping(value = "/create", method = RequestMethod.POST, params = {
"titleField", "descriptionField", "linksField" })
public String createCoursePost(Model model, HttpSession session,HttpServletRequest request,
@Valid CreateDTOForm userDto, BindingResult result) {
model.addAttribute("eMail", session.getAttribute("eMail"));
String title = request.getParameter("titleField");
String description = request.getParameter("descriptionField");
String links = request.getParameter("linksField");
model.addAttribute("EmptyTitle", "false");
model.addAttribute("EmptyDescription", "false");
model.addAttribute("EmptyLinks", "false");
if (result.hasErrors()) {
if (result.hasFieldErrors("name")){
model.addAttribute("EmptyTitle", "true");
}
if (result.hasFieldErrors("description")){
model.addAttribute("EmptyDescription", "true");
}
if (result.hasFieldErrors("links")){
model.addAttribute("EmptyLinks", "true");
}
}
CourseService courseService=new CourseService();
Course course = new Course();
course.setName(title);
course.setDescription(description);
course.setLinks(links);
course.setOwner(session.getAttribute("eMail").toString());
course = courseService.create(course );
return "redirect:/courses.html";
}
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<link rel="stylesheet" type="text/css" href="./css/style.css"/>
</head>
<body>
<div class="container">
<header>
<h1>
Create Course
<div class="logout">
<span id="currentUserLogin">
${eMail}
</span>
<a href="logout.html">
<i class="icon-off"></i>
</a>
</div>
</h1>
</header>
<#if ActionCreate=="false">
<div class="alert alert-error">
<div>
<strong>Okay, Houston, we've had a problem here.</strong>
</div>
<ul>
<li>Action not allowed. Say again please.</li>
</ul>
</div>
</#if>
<#if EmptyTitle=="true">
<div class="alert alert-error">
<div>
<strong>Okay, Houston, we've had a problem here.</strong>
</div>
<ul>
<li>Name field is required.</li>
</ul>
</div>
</#if>
<#if EmptyDescription=="true">
<div class="alert alert-error">
<div>
<strong>Okay, Houston, we've had a problem here.</strong>
</div>
<ul>
<li>Description field is required.</li>
</ul>
</div>
</#if>
<#if EmptyLinks=="true">
<div class="alert alert-error">
<div>
<strong>Okay, Houston, we've had a problem here.</strong>
</div>
<ul>
<li>Links field is required.</li>
</ul>
</div>
</#if>
<#if ActionCreate=="true">
<form class="form-horizontal" method=POST>
<fieldset>
<div class="control-group">
<label class="control-label">Name</label>
<div class="controls">
<input id="titleField" name="titleField" class="span5" type="text"/>
</div>
</div>
<div class="control-group">
<label class="control-label">Description</label>
<div class="controls">
<textarea id="descriptionField" name="descriptionField" class="span5" rows="3"></textarea>
</div>
</div>
<div class="control-group">
<label class="control-label">Links</label>
<div class="controls">
<textarea id="linksField" name="linksField" class="span5" rows="3"></textarea>
</div>
</div>
<div class="form-actions">
<button id="createButton" name="createButton" class="btn btn-primary" type="submit">Create</button>
</div>
</fieldset>
</form>
</#if>
<a class="btn" href="courses.html">Cancel</a>
</div>
</body>
</html>
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