I have in my jsp page some checkbox and I want to pass in my spring controller the checked ones.
insertTaskInformation.jsp
<body>
<div align="center">
<strong> <strong>Title:</strong>${task.title} <form:form
action="addSymbol" method="post" name="catch">
<c:forEach var="symbol" items="${symbols}">
<input type="checkbox" name="id" value="${symbol.type} }">${symbol.type}<BR>
</c:forEach>
<input type="submit" value="Submit">
</form:form>
</strong>
</div>
</body>
taksController.java
#RequestMapping(value="/addSymbol", method = RequestMethod.POST)
public String addSymbol() {
return "administration/taskRecap";
}
You can use spspring:form library and you add in your controller something like this :
#PostMapping("/greeting")
public String greetingSubmit(#ModelAttribute Greeting greeting) {
return "result";
}
And In your first controller, you add an attribute to the model with model.addAttribute(new greeting() ) so the full code will be
#RequestMapping(value="/addSymbol", method = RequestMethod.POST)
public String addSymbol(Model model) {
model.addAttribute(new greeting() )
return "administration/taskRecap";
}
For more information check here
Related
I want to deliver the entire object from html to the controller
Controller:
#RequestMapping(method = RequestMethod.GET)
public String get(){
Info info = new Info();
info.setTitle("Hello");
model.addAttribute("infos", Collections.singleton(info));
return "info-page";
}
#RequestMapping(method = RequestMethod.POST, value = "show-all")
public String showAllInfoObject(#ModelAttribute("info") Info info){
// info has null values!
}
HTML
<li th:each="info : ${infos}">
<span th:text="${info.title}">webTitle</span>.
<form th:action="#{'/show-all}" method="post">
<input type="hidden" name="result" th:field="*{info}" />
<input type="submit" value="show detalis" />
</form>
</li>
However, the controller gets an empty object.
Interestingly, when I provide only String "title", it gets the correct result in the controller.
How to deliver correctly the whole object from HTML?
The problem is that th:field replaces the attributes value, id, and name in the input tag.
I would rewrite the HTML code as something like this:
<ul>
<li th:each="info : ${infos}">
<span th:text="${info.title}"></span>
<form th:action="#{/show-all}" method="post" >
<input type="hidden" th:value="${info.title}" name="title" id="title" />
<input type="submit" value="show detalis" />
</form>
</li>
</ul>
So, setting the input name and id with "title", the controller will make the bind as expected.
The controller code remains the same but I will leave here the test that I did.
#RequestMapping(method = RequestMethod.GET)
public String get(Model model){
Info info = new Info();
info.setTitle("Hello");
Info info2 = new Info();
info2.setTitle("Hello2");
model.addAttribute("infos", Arrays.asList(info, info2));
return "info-page";
}
#RequestMapping(method = RequestMethod.POST, value = "show-all")
public String showAllInfoObject(#ModelAttribute("info") Info info){
// info has values!
return "info-page";
}
Hope it helps you.
I'm a beginner in spring boot I start with creating a contact form that send data to data base. this is the form:
<form:form method="POST" id="contactform" modelAttribute="message">
<div class="form">
<div class="six columns noleftmargin">
<label name="name">Name</label>
<form:input path="name" type="text" class="smoothborder" placeholder="Your name *"/>
</div>
<div class="six columns">
<label name="email">E-mail address</label>
<form:input path="email" type="text" class="smoothborder" placeholder="Your e-mail address *"/>
</div>
<label name="comment">Message</label>
<form:textarea path="comment" class="smoothborder ctextarea" rows="14" placeholder="Message, feedback, comments *"></form:textarea>
<input type="submit" id="submit" class="readmore" value="Submit"/>
</div>
</form:form>
And this is my conact controller:
#Autowired
private MessageRepository messageRepository ;
#RequestMapping(value= "/newmessage", method = RequestMethod.GET)
public String newMessage(ModelMap model) {
Message message = new Message();
model.addAttribute("message", message);
return ("/contact");
}
#RequestMapping(value="/newmessage",method=RequestMethod.POST)
public String saveMessage( Message message, BindingResult result, ModelMap model)
{
if (result.hasErrors()) {
return "/contact";
}
messageRepository.save(message);
model.addAttribute("success", "Message " + message.getName() + " "+ message.getEmail() + " "+ message.getComment()+ " registered successfully");
//return "success";
return "/homepage";
Folder Structure
You need to set the action of the form. If you want to hit /newmessage while submitting form, then you need to change as following :
<form:form method="POST" id="contactform" action="/newmessage" modelAttribute="message">
<!-- The elements of the form -->
</form:form>
Also, you need to add the modelAttribute to your controller method. And you should return only the name of the jsp page. If your page name is homepage.jsp then you should only return homepage from your controller method. Of course, homepage.jsp file needs to be in WEB-INF folder.
#RequestMapping(value="/newmessage",method=RequestMethod.POST)
public String saveMessage(#ModelAttribute("message") Message message, BindingResult result, ModelMap model) {
// Rest of the code
return "homepage";
}
I have a little problem. When I have an object with some fields, it's easy to pass these fields through form:
Controller:
#RequestMapping("/")
public String hello(Model model) {
model.addAttribute("test", Test);
return "index";
}
html:
<form th:action="#{/process}" method="post" th:object="${test}">
<input type="text" th:field="*{value}"/>
<input type="submit" />
</form>
But what if I don't want to have an object and pass only string? Something like that:
Controller:
#RequestMapping("/")
public String hello(Model model) {
model.addAttribute("test", "test string");
return "index";
}
html:
<form th:action="#{/process}" method="post">
<input type="text" th:field="${test}"/>
<input type="submit" />
</form>
doesn't work.
Thanks for help!
For next question in comments:
index.html:
<form th:action="#{/process}" method="post">
<textarea th:text="${sourceText}"/>
<input type="submit" />
ggg.html:
<textarea th:text="${sourceText}"/>
controller:
#RequestMapping("/")
public String hello(Model model) {
model.addAttribute("sourceText", "asdas");
return "index";
}
#RequestMapping("/process")
public String process(Model model, #ModelAttribute(value = "sourceText") String sourceText) {
return "ggg";
}
th:field is used only if you declare object like th:object.
<form th:action="#{/process}" method="post">
<input type="text" th:value="${sourceText}" name="sourceText"/>
<input type="submit" />
</form>
Spring matches values by "name" attribute. Just catch it with #RequestParam in controller like
#RequestMapping("/process")
public String process(Model model, #RequestParam String sourceText) {
return "ggg";
}
According how Spring MVC works you can't use a string as an object in a form, you need an object to encapsulate that string, because the form structure is Object and then any field linked to it.
In your case, I would create a view form object for those common situations, something like formView with the String attribute text. And you could use the same object in similar situations.
Other option if you don't want to create this extra object, you could send the data by AJAX, and build the data array to send to the controller in javascript.
Personally I would go for the first option, is more reusable.
Hope this help you
I'm trying to display validation errors in a 'user registration' page built with freemarker template if a controller returns binding errors.
My controller's code is as follows:
#Controller
#RequestMapping("/")
public class UserController {
#Autowired
private UserService userService;
#Autowired
private SecurityService securityService;
#Autowired
private UserValidator userValidator;
#RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(Model model) {
model.addAttribute("userForm", new User());
return "registration";
}
#RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(#ModelAttribute("useraccount") User userForm, BindingResult bindingResult, Model model) {
userValidator.validate(userForm, bindingResult);
if (bindingResult.hasErrors()) {
return "registration";
}
userService.save(userForm);
securityService.autologin(userForm.getUsername(), userForm.getPasswordConfirm());
return "redirect:/explore";
}
while this is the registration.ftl freemarker template I am trying to build :
<div>
<fieldset>
<h1>Create your Account</h1>
<form id="regForm" class="idealform" action="registration" method="post" name='useraccount'>
Username: <input type="text" name="username" /> <errors path="username" cssClass="error"/><br/>
Password: <input type="text" name="password" /><errors path="password" cssClass="error"/><br/>
<label class="main-label" style="width: 91px;"> </label>
<input type="submit" value="submit">
</form>
</fieldset>
I tried also the solution recommended here:
Displaying Spring MVC validation errors in Freemarker templates
and the registration.ftl becomes:
<#assign form=JspTaglibs["http://www.springframework.org/tags/form"] />
<#macro formErrors>
<#assign formErrors><#form.errors path="*" /></#assign>
<#if formErrors?has_content>
<div id="errors">
<#spring.message "admin.error.globalMessage" />
</div>
</#if>
</#macro>
<div>
<fieldset>
<h1>Create your Account</h1>
<#form.form id="regForm" class="idealform" action="registration" method="post" name='useraccount'>
Username: <input type="text" name="username" path="username" /> <br/>
Password: <input type="text" name="password" path="password" /><br/>
<#formErrors />
<label class="main-label" style="width: 91px;"> </label>
<input type="submit" value="submit">
</#form.form>
</fieldset>
</div>
but still the validation messages are not displayed.
Could you share your thoughts with me on this issue?
Thank you very much.
I rewrote your controller code to something like this:
#Controller
#RequestMapping("/")
public class UserController {
#Autowired
private UserService userService;
#Autowired
private SecurityService securityService;
#Autowired
private UserValidator userValidator;
#RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(#ModelAttribute(name = "userForm") User user) {
return "registration";
}
#RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(#ModelAttribute(name = "userForm") User user, BindingResult result) {
userValidator.validate(user, result);
if (result.hasErrors()) {
return "registration";
}
userService.save(user);
securityService.autologin(user.getUsername(), user.getPasswordConfirm());
return "redirect:/explore";
}
}
1) There is no need to use model.addAttribute("modelName", model) if you use a constructor without arguments, instead you can use a #ModelAttribute annotation specifying the name attribute (by default the name goes from the class name). You only have to be sure that this model is in a consistent state. Also you need to pass the name exactly the same as you use in your view (freemarker template).
Now "registration.ftl"
...
<#import "/spring.ftl" as spring/>
...
<fieldset>
<h1>Create your Account</h1>
<form id="regForm" class="idealform" action="<#spring.url '/registration'/>" method="post">
<#spring.bind 'userForm.username'/>
Username: <input type="text" name="${spring.status.expression}" value="${spring.status.value?html}"/>
<#list spring.status.errorMessages as error>
<span class="error">${error}</span>
<br>
</#list>
<#spring.bind 'userForm.password'/>
Password: <input type="password" name="${spring.status.expression}" value="${spring.status.value?html}"/>
<#list spring.status.errorMessages as error>
<span class="error">${error}</span>
<br>
</#list>
<label class="main-label" style="width: 91px;"> </label>
<input type="submit" value="submit">
</form>
</fieldset>
...
1)You need <#import "/spring.ftl" as spring/> in order to add spring's user-defined directives that are pretty useful.
2)Use <#spring.bind 'userForm.username'> directive to bind following input to your model. Here "userForm" is your model and "username" is a field that you want to bind. This directive also declares new variable "spring.status" that contains an "expression" variable - for a path, a "value" - to populate the form in case it's returned with errors, and "errorMessages" from BindingResult.
3)If you use a message source to support different languages you should change <span class="error">${error}</span> to something like <#spring.message '${error}'/> otherwise you'll get just message codes.
Hope it helps.
In my register form i'm using Bean Validator (JSR-303) for validate User object, and need to validate separately password confirmation, because it is not a member of User. I have a problem to assign error message for confirm field. How to do that ?
View:
<form:form modelAttribute="user" method="post" action="register.html">
<div class="fcell">
<div class="clabel"><spring:message code="label.password"/></div>
<div class="cdata"><form:password path="password"/></div>
<div class="cmsgs"><form:errors path="password" /></div>
</div>
<div class="fcell">
<div class="clabel"><spring:message code="label.confirm"/></div>
<div class="cdata"><input type="password" name="confirm"/></div>
<div class="cmsgs"></div>
</div>
</form:form>
Controller:
#RequestMapping("/register.html")
public String register(#RequestParam("confirm") String confirm, #ModelAttribute("user") #Valid User user, BindingResult result) {
if(!DigestUtils.sha256Hex(confirm).equals(user.getPassword())) {
/* Invalid property 'confirm' ... */
result.rejectValue("confirm", "text.passwords_not_equal");
}
return "register";
}
In this case confirmation can be considered a part of model object, like this:
public class RegistrationForm {
#Valid
private User user;
private String confirm;
...
}
...
public String register(#ModelAttribute("user") #Valid RegistrationForm user,
BindingResult result) { ... }
...
<div class="cdata">
<form:password path="confirm"/></div>
<div class="cmsgs"><form:errors path="confirm" />
</div>
...