I am building an App where a new website can be added to the list and I would now like to be able to redirect the user to this given website. How do I do that?
For example, a user can add to the list: www.example.com. Clicking the link (inside Index.html) will take the user to the example homepage.
index.html is where I would like the link to appear to the user
<td><a th:href="#{'/website.link'}">Link</a></td>
new.html page can add links
<div alight="left">
<tr>
<label class="form-label">Link</label>
<td><input type="text" th:field="*{link}" class="form-control"
placeholder="Link" /></td>
</tr>
</div>
Notice I don't have anything in the Controller yet.
Consider a Contr-application like:
#Controller
#SpringBootApplication
public class Application {
private final List<URI> allLinks = Collections.synchronizedList(new ArrayList<>());
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#ModelAttribute("allLinks")
public List<URI> allLinks() {
return allLinks;
}
#GetMapping("/")
public String index() {
return "index";
}
#PostMapping(value = "/", params = "send")
public void sendMeThere(#RequestParam String link, HttpServletResponse response) throws IOException {
// response send redirect! (relative/absolute/throws exception)
response.sendRedirect(link);
}
#PostMapping(value = "/")
public String addLink(#RequestParam String link) throws URISyntaxException {
links.add(new URI(link)); // throws exception!
return "redirect:/";
}
}
We can try it out with an index.html like this:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="https://www.thymeleaf.org" lang="en">
<head>
<title>Hello Links</title>
</head>
<body>
<h2>Add More Lnks</h2>
<form action="" th:action="#{/}" method="post">
<label>Link</label>
<input type="text" name="link"
placeholder="http://www.example.com" />
<input type="submit" value="Add Link" />
</form>
<hr/>
<h2>Naviagte via form submit</h2>
<form action="" th:action="#{/}" method="post">
<select name="link">
<option th:each="link : ${allLinks}" th:value="${link}" th:text="${link}" />
</select>
<input type="submit" value="Send me There" />
<input type="hidden" name="send" />
</form>
<hr/>
<h2>Naviagte via link</h2>
<ul>
<li th:each="link : ${allLinks}">
<!-- encapsulate ${link} in thymeleaf url #{...} (relative or absolute) -->
<a th:href="#{${link}}" th:text="${link}"/>
</li>
</ul>
</body>
</html>
It looks like:
References:
HttpServletResponse#sendRedirect
Thymeleaf URL Syntax
Related
create.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" type="text/css" href="/css/main.css" />
</head>
<body>
<a th:href="#{/admin/}">Admin</a>
<br>
<br>
<br>
<h1>Add core phrases to the database</h1>
<br>
<br>
<form method="POST" th:object="${corePhrasesCreateForm}">
<table>
<tr>
<td>Quotation cluster (" "):</td>
<td><input
type="number"
id="quotation-cluster"
name="quotation-cluster"
th:value="${quotationCluster}"/></td>
<td th:if="${#fields.hasErrors('quotationCluster')}" th:errors="*{quotationCluster}">quotationCluster</td>
</tr>
<tr>
<td>Quotation Exclamation cluster ("!")</td>
<td><input
type="number"
id="quotation-exclamation-cluster"
name="quotation-exclamation-cluster"
th:value="${quotationExclamationCluster}"/></td>
<td th:if="${#fields.hasErrors('quotationExclamationCluster')}" th:errors="*{quotationExclamationCluster}">quotationExclamationCluster</td>
</tr>
<tr>
<td>Phrases</td>
<td><textarea rows="5" cols="60" name="value" placeholder="Key phrases" th:text="${value}"></textarea></td>
<td class="error" th:if="${#fields.hasErrors('value')}" th:errors="*{value}">value</td>
</tr>
</table>
<br/>
<input type="submit" value="submit"/>
</form>
</body>
</html>
Validator
import com.example.marketing3.semantics.semanticsClusters.repositories.ClusterRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
#RequiredArgsConstructor
#Service
public class CorePhraseFormValidator implements Validator {
private final ClusterRepository clusterRepository;
#Override
public boolean supports(Class<?> clazz) {
return false;
}
#Override
public void validate(Object target, Errors errors) {
System.out.println();
}
Controller
#Controller
#RequestMapping("/semantics/phrases/core")
#RequiredArgsConstructor
public class CorePhraseController {
#GetMapping({"/create", "/create/"})
public String createGet(CorePhrasesCreateForm corePhrasesCreateForm) {
return "semantics/phrases/core/create";
}
#PostMapping({"/create", "/create/"})
public String createPost(#Valid CorePhrasesCreateForm corePhrasesCreateForm,
BindingResult bindingResult,
RedirectAttributes atts) {
corePhraseFormValidator.validate(corePhrasesCreateForm, bindingResult);
if (bindingResult.hasErrors()) {
return "semantics/phrases/core/create";
}
atts.addAttribute("message", "Core phrases created");
String result = "";
return "redirect:/general/message";
}
}
The form has been rendered.
I entered
Quotation cluster (" "): 1
Quotation Exclamation cluster ("!"): 2
And some text for phrases.
Like this:
The problem:
To createPost quotationCluster and quotationExclamationCluster came as zeroes.
But I entered 1 and 2 respectively.
Could you help me understand what I have don wrongly and correct the situation.
Change
<input type="number" id="quotation-cluster"
name="quotation-cluster" th:value="${quotationCluster}"/>
To:
<input type="number" id="quotation-cluster" th:field="*{questionCluster}"
name="quotationCluster" th:value="${quotationCluster}"/>
the name and th:field should be same as the declared attribute in your java class CorePhraseForm. Repeat this for the the next input (Textarea).
Hi I'm having some trouble retrieving information from the user using a spring controller.
the controller looks like this:
#Slf4j
#Controller("indexController")
public class IndexController {
List<String> userInput = new ArrayList<>(Arrays.asList(new String[]{"Apple", "Blackberry", "Strawberry"}));
public List<String> getUserInput() {
return userInput;
}
#RequestMapping(value = "/home", method = RequestMethod.GET)
public String home(
Model model
){
log.info("home path was hit");
model.addAttribute("options", getUserInput());
model.addAttribute("option", new Object());
return "index";
}
#RequestMapping(value = "createOrder", method = RequestMethod.POST)
public String placeUserOrder(
Model model,
#ModelAttribute("option")String usersInput
){
log.info("createOrder path was hit");
log.info(usersInput);
return "redirect:/home";
}
the index.thml within re main/resource/templates folder looks like this:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>home page</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<h2>your orders are:</h2>
<form method="post" action="/createOrder" th:object="${order}">
<th:text alignment-baseline="text-before-edge" aria-atomic="true" > select a copybook</th:text>
<select class="from-control" id="dropDownList">
<option value="0">select copybook</option>
<option th:each="option : ${options}" th:value="${option}" th:text="${option}" >
<input type="hidden" name="${_csrf.usersChoiceFromThymeleaf}" value="${_csrf.token}" />
</option>
<input type="submit" name="createOrder" value="place">
</select>
</p>
</p>
</form>
<th:block th:each="order : ${orders}">
<tr>
<td th:text="${order.value}"></td>
</tr>
</th:block>
</body>
</html>
every time after i set a breakpoint within the post function the option value is empty.
what am i doing wrong?
shouldnt i expect a string from selected dropdown menu?
i tried to fetch an int and it remains empty as well
the model contains also only 2 key value pairs "option"->""
and org.springframework.validation.BindingResult.option -> {BeanPropertyBindingResult#7472} "org.springframework.validation.BeanPropertyBindingResult: 0 errors"
In the post "Hello World" phase of my Spring journey. Creating an app that POSTS two fields which RESULT in three fields.
My controller has three fields. Two are populated on POST, and all three should populate the RESULT fields.
The Controller:
#Slf4j
#Controller
public class GreetController {
#GetMapping("/greeting")
public String greetingForm(Model model) {
model.addAttribute("greeting", new Greeting());
}
#PostMapping("/greeting")
public String greetingSubmit(#ModelAttribute Greeting greeting, Model model) {
model.addAttribute("greeting", greeting);
}
}
The Model:
public class Greeting {
//fields correspond to greeting.html
private long id;
private String content;
private String numbah;
public String getNumbah() { return numbah; }
public void setNumbah() {
this.numbah = SomeFunctions.functionOne(this.getContent());
}
public long getId() { return id; }
public void setId(long id) { this.id = id; }
public String getContent() { return content; }
public void setContent(String content) { this.content }
}
The View:
<!DOCTYPE HTML>
this is greeting.html
<html xmlns:th="https://www.thymeleaf.org">
<head>
<title>Getting Started: Handling Form Submission</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Form</h1>
<!--th.fields correspond to fields in th.object (ie greeting.java)-->
<form action="#" th:action="#{/greeting}" th:object="${greeting}" method="post">
<p>Id: <input type="text" th:field="*{id}" /></p>
<p>Message: <input type="text" th:field="*{content}" /></p>
<p><input type="submit" value="Submit" /> <input type="reset" value="Reset" /></p>
</form>
<h1>Result</h1>
<p th:text="'id: ' + ${greeting.id}" />
<p th:text="'content: ' + ${greeting.content}" />
<p th:text="'numbah: ' + ${greeting.numbah}" />
Submit another message
</body>
</html>
Note:
The ${greeting.numbah} field, as configured above, is resulting in null. I had a log statement in that function that never returned anything, indicating that the function in the model is never firing. However, when the view was configured like this...
<body>
<h1>Form</h1>
<!--th.fields correspond to fields in th.object (ie greeting.java)-->
<form action="#" th:action="#{/greeting}" th:object="${greeting}" method="post">
<p>Id: <input type="text" th:field="*{id}" /></p>
<p>Message: <input type="text" th:field="*{content}" /></p>
<p>Some Number: <input type="text" th:field="*{numbah}"></p>
<p><input type="submit" value="Submit" /> <input type="reset" value="Reset" /></p>
</form>
<h1>Result</h1>
<p th:text="'id: ' + ${greeting.id}" />
<p th:text="'content: ' + ${greeting.content}" />
<p th:text="'numbah: ' + ${greeting.numbah}" />
Submit another message
</body>
...the field was populating, so the function itself....functions.
Long short, what I'm attempting to do here is take id and content, do someFunction(content)=numbah and return id, content, and numbah.
Thank you in advance.
It always gets down to something simple, doesn't it?
There was a typo in the setNumbah constructor in the model.
This is why I hardly ever post on sites like this: because you almost always figure out what you did wrong if you just sleep on it and have another look.
Thanks for checking this out and apologies that it's not a "high quality" problem/answer. Will delete if that's the protocol for a self-answered question.
Spring Boot 2.5, Thymeleaf
I need when click submit to pass object Product and additional extra param (quantity)
html template:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title th:text="${appName}">Category template title</title>
<link th:href="#{/public/style.css}" rel="stylesheet"/>
<meta charset="UTF-8"/>
</head>
<body>
<div class="container">
<h3 th:text="*{title}"/>
<form method="post" action="#" th:object="${product}" th:action="#{/product}">
<input type="hidden" id="id" th:field="*{id}"/>
<input type="text" placeholder="Name" id="name" th:field="*{name}" th:disabled="${isView}"/>
<input type="hidden" id="created" th:field="*{created}"/>
<textarea placeholder="Description" rows="5" id="description"
th:field="*{description}" th:disabled="${isView}"></textarea>
<input type="number" placeholder="Price" id="price" th:field="*{price}" th:disabled="${isView}"/>
<input type="text" placeholder="Currency" id="currency" th:field="*{currency}" th:disabled="${isView}"/>
<input type="text" placeholder="Images URL(separate by comma)" id="images" th:field="*{images}" th:disabled="${isView}"/>
<input th:type="${isView} ? hidden : submit" value="Submit"/>
</form>
</div>
</body>
</html>
and here my controller:
#RequestMapping("cart/add")
public String addProduct(Model model) {
logger.info("addProduct");
model.addAttribute("isAdd", true);
model.addAttribute("product", new Product());
model.addAttribute("title", "Add Product");
model.addAttribute("viewMode", ViewMode.ADD);
return "product";
}
#PostMapping(value = "/product")
public String submitProduct(Product product, Model model) {
logger.info("submitProduct = " + product);
if (product.getId() == 0) { // add category
product.setCreated(new Date());
} else { // update category
product.setUpdated(new Date());
}
return "redirect:/cart";
}
So when click button Submit call submitProduct with fill object Product. But I need to pass extra param (as second param in method submitProduct) - quantity.
How I can pass this extra int param from html to controller?
One option is to access the value directly from the request parameters.
Assuming the quantity value is available in the form as an input field, with a name of quantity (looks like it is not there at the moment), then you can alter your controller to use this:
import org.springframework.web.bind.annotation.RequestParam;
And then change the relevant method signature to something like this:
public String submitProduct(Product product, Model model,
#RequestParam(name = "quantity") String quantity) {...}
(Field validation of some kind would also be needed, I assume.)
I have an Employee class that looks like this.
public class Employee {
private String Name;
private List<Address> address;
*****Getters and Setters****
}
And my Address class looks like this
public class Address {
private int addressid;
private Employee employee;
#NotNull(message="Field Cannot be Empty")
private String description;
*****Getters and Setters****
}
I want to bind List of addresses (Employee can have more than one address - 1:M) to the employee class with the data that is parsed through the form. Which looks like this.
I have 3 input address fields, one of the sample input fields look like this...
<div class="form-group">
<div class="row">
<label class="col-sm-3" for="exampleInputEmail1">Address
1</label>
<div class="col-sm-7">
<form:input class="form-control" placeholder="" path="" />
<form:errors path="" cssClass="error" />
</div>
</div>
</div>
Note that I have cut down many unnecessary form fields to demonstrate the problem more clearly. Please help me bind the list of input fields with the relevant class. Any advice for this design is also welcome.
You can use Thymeleaf for this as below.
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<title>form|data</title>
</head>
<body>
<div class="starter-template">
<form th:action="#{employeeData}" method="post" th:object="${employee}">
<input th:field="*{name}" type="text" th:name="name" name="name" placeholder="name" class="input u-one-third js-get-form-data"/>
<th:block th:each="add,addStat:*{address}">
<input th:field="*{address[__${addStat.index}__].description}" type="text" th:name="add.description" name="description" placeholder="description" class="input u-one-third js-get-form-data"/>
</th:block>
<input type="submit" value="SEND"/>
</form>
</div>
</body>
</html>
Controller.
#RequestMapping(value = "/formData", method = RequestMethod.GET)
public String formData(Map<String, Object> model) {
Employee employee = new Employee();
Address address = new Address();
address.setDescription("TEST");
address.setEmployee(employee);
employee.getAddress().add(address);
model.put("employee",employee);
return "formData";
}
#RequestMapping(value = "/employeeData", method = RequestMethod.POST)
public void employeeData(#Valid Employee employeeData, BindingResult errors) {
System.out.println(employeeData.getName());
}
Please find the working commit here.