Why I am not able to insert and update? - java

<%#include file="../header.jsp" %>
<h1>Add Room</h1>
<form action="save" method="post" enctype="multipart/form-data">
<div class="form-group">
<label>Room Type</label>
<input type="text" name="roomType" placeholder="Enter Room Type" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Description</label>
<input type="text" name="roomDescription" placeholder="Enter Room Description" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Number</label>
<input type="number" name="roomNumber" placeholder="Enter Room Number" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Image</label>
<input type="file" name="file" placeholder="Select Room Image" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Image</label>
<input type="hidden" name="ro_id" value="${Room.ro_id}" placeholder="Select Room Image" required="required" class="form-control"/>
</div>
<div class="form-group">
<button type="submit" class="btn btn-success" value="submit">Save</button>
</div>
</form>
<%#include file="../footer.jsp" %>
Here is my edit jsp from where I update my database
Edit Room Jsp for updating for database using Room controller and I get
"Column Image"cannot be null
<%#include file="../header.jsp" %>
<h1>Edit Room</h1>
<form action="${SITE_URL}/admin/room/save" method="post" enctype="multipart/form-data">
<div class="form-group">
<label>Room Type</label>
<input type="text" name="roomType" value="${Room.room_type}" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Description</label>
<input type="text" name="roomDescription" value="${Room.room_description}" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Number</label>
<input type="number" name="roomNumber" value="${Room.room_number}" required="required" class="form-control"/>
</div>
<div class="form-group">
<label>Room Image</label>
<input type="file" name="file" link src="D:/Hotels/uploadedImage/${Room.image}" required="required" class="form-control" />
</div>
<form:hidden path="${Room.ro_id}" />
<input type="text" value="${Room.ro_id}" name="id"/>
<div class="form-group">
<button type="submit" class="btn btn-success" value="editroom/ro_id" >Save</button>
</div>
</form>
<%#include file="../footer.jsp" %>
When I try to update the page i get Column"image" cannot be null
and when I try to add it "Required int parameter #id is not present
/**
*
* #author
*/
#Controller
#RequestMapping(value = "/admin/room")
public class Roomcontroller {
#Autowired
private RoomService roomService;
#RequestMapping(method = RequestMethod.GET)
public String index(ModelMap map) throws SQLException {
map.addAttribute("Room", roomService.getAll());
return "admin/room/index";
}
#RequestMapping(value = "/addroom", method = RequestMethod.GET)
public String addRoom() throws SQLException {
return "admin/room/addroom";
}
#RequestMapping( value = "/editroom/{ro_id}", method = RequestMethod.GET )
public #ResponseBody ModelAndView edit(#PathVariable("ro_id") int ro_id) throws SQLException {
ModelAndView mv = new ModelAndView("admin/room/editroom");
mv.addObject("Room", roomService.getById(ro_id));
return mv;
}
#RequestMapping(value = "/deleteroom/{ro_id}", method = RequestMethod.GET)
public String delete(#PathVariable("ro_id") int ro_id) throws SQLException {
roomService.delete(ro_id);
return "redirect:/admin/room";
}
#RequestMapping(value = "/save", method = RequestMethod.POST)
public String save(#RequestParam("roomType") String roomType,#RequestParam("id") int id,
#RequestParam("roomDescription") String roomDescription, #RequestParam("roomNumber") int roomNumber
,#RequestParam("file") MultipartFile multipartFile,HttpServletRequest req) throws SQLException, IOException {
Room attributes
Room room = new Room();
room.setRo_id(id);`
room.setRoom_type(roomType);
room.setRoom_description(roomDescription);
room.setRoom_number(roomNumber);
// TO DO : Save room, fetch the id of saved room and set it through
// setter in above object.
System.out.println(room.getRo_id());
if(room.getRo_id()==0){
System.out.println(room.getRo_id());
String serverRootPath = req.getServletContext().getRealPath("");
System.out.println(serverRootPath);
// You can change the directory.
File roomImageDirectory = new File("D:\\Hotels\\uploadedImages");
if (!roomImageDirectory.exists()) {
roomImageDirectory.mkdirs();
}
String[] fileNameToken = multipartFile.getOriginalFilename().split("\\.");
// You can change file name to be saved.
String newFileName = "room-" + room.getRoom_number() + "." + fileNameToken[fileNameToken.length - 1];
File roomImage = new File(roomImageDirectory, "/" + newFileName);
roomImage.createNewFile();
multipartFile.transferTo(roomImage);
room.setImage(newFileName);
roomService.insert(room);
}
else
{
roomService.update(room);
}
return "redirect:/admin/room";
}
}

Related

Spring MVC Login Form

I have created a simple login form that will redirect to the next page after submitting the form credentials. But it's not working fine.
here is my code:
Controller class:
#RequestMapping("/home")
public String showForm() {
return "home";
}
#RequestMapping(path = "/handleForm", method = RequestMethod.POST)
public String handleForm(HttpServletRequest request) {
String name = request.getParameter("username");
String pass = request.getParameter("password");
if (name != null && pass != null) {
if (name.equals("Twinkle") && pass.equals("twinkle123")) {
return "student-list";
} else {
return "home";
}
} else {
return "error";
}
}
home jsp file:
<div class="container mt-5">
<h3 class="text-center">Welcome, Login Here</h3>
<form action="handleForm" method="POST">
<div class="form-group">
<label for="username">User Name</label>
<input type="text" class="form-control"
id="username"
placeholder="Enter here"
name="username">
</div>
<div class="form-group">
<label for="password">Password</label>
<input type="password" class="form-control" id="password" minlength="4"
maxlength="8" placeholder="Enter here" name="password">
</div>
<div class="container mt-5 text-center">
<button type="submit" class="btn btn-success">Submit</button>
</div>
</form>
</div>
How to fix it?

How to set a object's field using another objects field in thymeleaf

I'm trying to set boxes' elements copied from medicineBox's values like below. Can anyone help me in this. I need to post medicineOrder model to the controller
<tr th:each="medicineBox : ${medicine.medicineBoxes}">
<td class="text-center">
<input type="text" th:field="*{boxes[__${medicineBoxStat.index}__].boxNumber}" th:value="${medicineBox.box.number}" />
</td>
<td class="text-center" th:text="${medicineBox.medicineCount}"></td>
<td><input type="number" th:field="*{boxes[__${medicineBoxStat.index}__].medicineCount}" class="form-control" /></td>
</tr>
I'm using two object here -
medicine and medicineOrder
------------------> Controller method to get the page
#GetMapping("/{medicineId}")
public String loadMedicineDetailPage(#PathVariable("medicineId") long medicineId, Model model) {
model.addAttribute("medicine", service.getMedicineById(medicineId));
model.addAttribute("medicineOrder", new MedicineOrder());
return WebPages.MEDICINE_DETAIL.toString();
}
------------------> thymeleaf html page
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1"/>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<title>Spring Boot Application</title>
</head>
<body>
<div class="container">
<br/>
<a class="btn btn-primary" th:href="#{/mvc/medicine/list}">Back</a>
<br/>
<br/>
<h3 class="text-center alert alert-success">Medicine Details</h3>
<form class="row g-3" action="#" th:action="#{/mvc/medicine/sell}" method="post" th:object="${medicineOrder}">
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="name" class="form-label">Name</label>
<input type="text" style="background-color:#95edea" disabled class="form-control" id="name" th:field="${medicine.name}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="company" class="form-label">Company</label>
<input type="text" disabled class="form-control" id="company" th:field="${medicine.companyStringName}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="price" class="form-label">Price</label>
<input type="text" disabled class="form-control" id="price" th:field="${medicine.price}"/>
</div>
<!--<div class="col-md-6 col-xs-12 col-sm-12">
<label for="count" class="form-label">Count</label>
<input type="text" class="form-control" id="count" th:field="${medicine.count}"/>
</div>-->
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="volume" class="form-label">ML</label>
<input type="text" disabled class="form-control" id="volume" th:field="${medicine.volume}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="purchaseDate" class="form-label">Date Purchased</label>
<input type="text" disabled class="form-control" id="purchaseDate" th:field="${medicine.purchaseDate}"/>
</div>
<!--<div class="col-md-6 col-xs-12 col-sm-12">
<label for="boxNo" class="form-label">Box Number</label>
<input type="text" class="form-control" id="boxNo" th:field="${medicine.boxNumber}"/>
</div>-->
**<input type="hidden" th:field="*{medicineId}" th:value="${medicine.medicineId}"/>**
<table class="table table-bordered">
<tr class="table-primary">
<td>Box Number</td>
<td>Medicine Count</td>
<td>Sell Count</td>
</tr>
<tr th:each="medicineBox : ${medicine.medicineBoxes}">
<td class="text-center">
**<input type="text" th:field="*{boxes[__${medicineBoxStat.index}__].boxNumber}" th:value="${medicineBox.box.number}"** />
</td>
<td class="text-center" th:text="${medicineBox.medicineCount}"></td>
<td><input type="number" th:field="*{boxes[__${medicineBoxStat.index}__].medicineCount}" class="form-control" /></td>
</tr>
</table>
<button class="btn btn-primary" type="submit">Sell</button>
</form>
</div>
</body>
</html>
---------------> Controller method to handle the post request
#PostMapping("/sell")
public String sellMedicine(#ModelAttribute MedicineOrder medicineOrder, BindingResult bindingResult) {
if(bindingResult.hasErrors()){
// error handling
}
service.sellMedicine(medicineOrder);
return "redirect:/mvc/medicine/list";
}
----------------> Class MedicineOrder
package com.example.demo.dto;
import com.example.demo.model.Box;
import java.util.ArrayList;
import java.util.List;
public class MedicineOrder {
private long medicineId;
private List<OrderedBox> boxes = new ArrayList<>();
public long getMedicineId() {
return medicineId;
}
public void setMedicineId(long medicineId) {
this.medicineId = medicineId;
}
public List<OrderedBox> getBoxes() {
return boxes;
}
public void setBoxes(List<OrderedBox> boxes) {
this.boxes = boxes;
}
#Override
public String toString() {
return "MedicineOrder{" +
"medicineId=" + medicineId +
", boxes=" + boxes +
'}';
}
}
package com.example.demo.dto;
public class OrderedBox {
private String boxNumber;
private int medicineCount;
public String getBoxNumber() {
return boxNumber;
}
public void setBoxNumber(String boxNumber) {
this.boxNumber = boxNumber;
}
public int getMedicineCount() {
return medicineCount;
}
public void setMedicineCount(int medicineCount) {
this.medicineCount = medicineCount;
}
#Override
public String toString() {
return "OrderedBox{" +
"boxNumber='" + boxNumber + '\'' +
", medicineCount=" + medicineCount +
'}';
}
}
Not able to get the MedicineOrder.medicineId and medicineBorder.boxes[*].boxNumber from template to model object.
After lot of searching I didn't find any answer which is solving the issue only using thymeleaf.
To solve this issue I had to add two hidden input field for medicineId and boxNumber on medicineOrder object and populate those input field using javascript as below. Anyway if anyone find the solution by only using thymeleaf, please let me know.
Populated those fields using javascript
<script>
function function__02__number__assignment(_element){
var __element = _element.children[0];
var __tElement1 = __element.children[0];
var __tElement2 = __element.children[1];
// Copy value from 2 to 1
__tElement1.value = __tElement2.value;
}
function function__01__box_traverse(){
var rootElement = document.getElementsByClassName('box-stock-details');
for(var __i=0 ; __i < rootElement.length ; __i++) {
function__02__number__assignment(rootElement[__i]);
}
function_01_01_medicineId();
return true;
}
function function_01_01_medicineId(){
var _00_1_id_src = document.getElementById('00-1-id-src');
var _00_1_id_dest = document.getElementById('00-1-id-dest');
_00_1_id_dest.value = _00_1_id_src.value;
}
</script>
updated template file
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1"/>
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<title>Spring Boot Application</title>
</head>
<body>
<div class="container">
<br/>
<a class="btn btn-primary" th:href="#{/mvc/medicine/list}">Back</a>
<br/>
<br/>
<h3 class="text-center alert alert-success">Medicine Details</h3>
<form class="row g-3" action="#" th:action="#{/mvc/medicine/sell}" method="post" th:object="${medicineOrder}">
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="name" class="form-label">Name</label>
<input type="text" style="background-color:#95edea" disabled class="form-control" id="name" th:field="${medicine.name}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="company" class="form-label">Company</label>
<input type="text" disabled class="form-control" id="company" th:field="${medicine.companyStringName}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="price" class="form-label">Price</label>
<input type="text" disabled class="form-control" id="price" th:field="${medicine.price}"/>
</div>
<!--<div class="col-md-6 col-xs-12 col-sm-12">
<label for="count" class="form-label">Count</label>
<input type="text" class="form-control" id="count" th:field="${medicine.count}"/>
</div>-->
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="volume" class="form-label">ML</label>
<input type="text" disabled class="form-control" id="volume" th:field="${medicine.volume}"/>
</div>
<div class="col-md-6 col-xs-12 col-sm-12">
<label for="purchaseDate" class="form-label">Date Purchased</label>
<input type="text" disabled class="form-control" id="purchaseDate" th:field="${medicine.purchaseDate}"/>
</div>
<!--<div class="col-md-6 col-xs-12 col-sm-12">
<label for="boxNo" class="form-label">Box Number</label>
<input type="text" class="form-control" id="boxNo" th:field="${medicine.boxNumber}"/>
</div>-->
<!-- Hidden input to get the value of medicineId from Medicine object -->
<input id="00-1-id-src" type="hidden" th:value="${medicine.medicineId}"/>
<!-- Hidden input to set the medicineId on MedicineOrder object -->
<input id="00-1-id-dest" type="hidden" th:field="*{medicineId}" />
<table class="table table-bordered">
<tr class="table-primary">
<td>Box Number</td>
<td>Medicine Count</td>
<td>Sell Count</td>
</tr>
<tr class="box-stock-details" th:each="medicineBox : ${medicine.medicineBoxes}">
<td class="text-center">
<input hidden th:field="*{boxes[__${medicineBoxStat.index}__].boxNumber}" />
<input disabled class="form-control" type="text" th:value="${medicineBox.box.number}" />
</td>
<td class="text-center" th:text="${medicineBox.medicineCount}"></td>
<td><input type="number" th:field="*{boxes[__${medicineBoxStat.index}__].medicineCount}" class="form-control" /></td>
</tr>
</table>
<button class="btn btn-primary" type="submit" onclick="return function__01__box_traverse()">Sell</button>
</form>
</div>
</body>
<script>
function function__02__number__assignment(_element){
var __element = _element.children[0];
var __tElement1 = __element.children[0];
var __tElement2 = __element.children[1];
// Copy value from 2 to 1
__tElement1.value = __tElement2.value;
}
function function__01__box_traverse(){
var rootElement = document.getElementsByClassName('box-stock-details');
for(var __i=0 ; __i < rootElement.length ; __i++) {
function__02__number__assignment(rootElement[__i]);
}
function_01_01_medicineId();
return true;
}
function function_01_01_medicineId(){
var _00_1_id_src = document.getElementById('00-1-id-src');
var _00_1_id_dest = document.getElementById('00-1-id-dest');
_00_1_id_dest.value = _00_1_id_src.value;
}
</script>
</html>

400 bad request when submitting form

I can't seem to figure out why I keep getting a 400 bad request. Before I got 400 bad request, the form had "id" instead of "name". When the form had "id" I got 200 but didn't update my database. Now, I get the error and nothing seems to be working.
Here's my controller:
#RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(MemberVO vo, Model model) {
System.out.println(vo);
logger.info("regist post...");
logger.info(vo.toString());
try {
mservice.insertMember(vo);
} catch (Exception e) {
e.printStackTrace();
}
return "/register_success";
}
#RequestMapping(value = "/registration", method = RequestMethod.GET)
public void registrationGet(MemberVO vo, Model model) {
}
Here's my form:
<form role = "form" method ="post">
<div class="form-group">
<input type="email" class="form-control" name = "username" placeholder="Email" required/>
<span><i class="fa fa-envelope"></i></span>
</div>
<div class="form-group">
<input type="password" class="form-control" name = "password" placeholder="Password" required/>
<span><i class="fa fa-lock"></i></span>
</div>
<div class="form-group">
<input type="text" class="form-control" name = "firstname" placeholder="firstname" required/>
<span><i class="fa fa-user"></i></span>
</div>
<div class="form-group">
<input type="text" class="form-control" name = "lastname" placeholder="lastname" required/>
<span><i class="fa fa-user"></i></span>
</div>
<div class="form-group">
<input type="text" class="form-control" name = "phonenum" placeholder="Phone Number" required/>
<span><i class="fa fa-user"></i></span>
</div>
<div class="form-group">
<input type="text" class="form-control" name = "birthday" placeholder="Birthday, ex) 1986-06-08" required/>
<span><i class="fa fa-user"></i></span>
</div>
<div class="form-group">
<input type="text" class="form-control" name = "destination" placeholder="where would you like to go?" required/>
<span><i class="fa fa-user"></i></span>
</div>
<button type = "submit" class="btn btn-orange btn-block">Sign Up</button>
</form>
We can not tell you the exact problem as you have not attached your modal class MemberVO but you can check below.
1.There is no action attribute in your form.
2.Ensure that all the fields present in Modal class should also be present in the form with the same name.

Required request part 'photo' is not present

I encountered this issue on uploading image file. It say's that there is something part is missing and I have no idea. I have searched so many things already but still I couldn't find a solution. I'm trying to insert it in database and store the file in my project directory. It's seems I have missed something.
here is my html:
<form autocomplete="off" th:action="#{/AddCriminal}"
enctype="multipart/form-data" method="post" class="m-t" role="form"
th:object="${criminalRec}" data-toggle="validator">
<h1 class="text-white">Add Criminal</h1>
<div th:if="${info}" class="alert alert-success" role="alert"
th:text=${info}></div>
<div th:if="${infoError}" class="alert alert-danger" role="alert"
th:text="${infoError}"></div>
<div class="row text-center">
<div class="col-md-5">
<div th:if="${#fields.hasErrors('name')}" th:errors="*{name}"
class="validation-message alert alert-danger" role="alert"></div>
<div th:if="${#fields.hasErrors('seq_number')}"
th:errors="*{seq_number}"
class="validation-message alert alert-danger" role="alert"></div>
<div th:if="${#fields.hasErrors('comments')}"
th:errors="*{comments}"
class="validation-message alert alert-danger" role="alert"></div>
<div class="form-group">
<label class="text-white">Full Name: </label> <input type="text"
th:field="*{name}" placeholder="Wanted Full name"
class="form-control" required /> <small id="firstnameHelp"
class="form-text text-muted text-white">Full name of the
person</small>
</div>
<div class="form-group">
<label class="text-white">Sequence Number: </label> <input
type="text" th:field="*{seq_number}"
placeholder="Sequence Number" class="form-control" required /> <small
id="firstnameHelp" class="form-text text-muted text-white">Sequence
of the records the Ascending order</small>
</div>
<div class="form-group">
<label class="text-white">Photo: </label> <!-- <input type="file"
th:field="*{photo}" placeholder="Add Photo" class="form-control"
accept="image/*" required /> -->
<input type="file" name="photo" accept="image/*" class="form-control" />
<small id="firstnameHelp" class="form-text text-muted text-white">Upload
Photo</small>
</div>
</div>
<div class="col-md-12">
<div class="form-group">
<textarea class="form-control" th:field="*{comments}"
placeholder="Facts" rows="3" required></textarea>
<small id="firstnameHelp" class="form-text text-muted text-white">Facts
about this criminal</small>
</div>
</div>
<div class="col-md-5">
<button type="submit" class="btn btn-primary block full-width m-b">Add
Criminal</button>
</div>
</div>
</form>
my controller:
#RequestMapping(value = "/AddCriminal", method = RequestMethod.POST, consumes = "multipart/form-data")
public ModelAndView processCriminal(ModelAndView modelAndView,
#Valid #ModelAttribute("criminalRec") Criminals criminalRec, #RequestParam("photo") MultipartFile file,
BindingResult bindingResult, HttpServletRequest request)
throws SerialException, SQLException, IOException {
if (bindingResult.hasErrors()) {
modelAndView.setViewName("/admin/addwantedperson");
} else {
storageService.store(file);
System.out.println("FILENAME: " + storageService.getFName());
byte [] byteArr=file.getBytes();
Blob blob = new SerialBlob(byteArr);
criminalRec.setPhoto(blob);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate localDate = LocalDate.now();
criminalRec.setDate_added(formatter.format(localDate));
criminalService.saveCriminal(criminalRec);
modelAndView.addObject("info", "Criminal Record Successfully Added!");
modelAndView.addObject("criminalRec", new Criminals());
modelAndView.setViewName("/admin/addwantedperson");
}
return modelAndView;
}
In your Application Properties add spring.http.multipart.enabled=true

java spring - post request with additional value

I have implemented a registration process where you can send user data to the controller via post request.
The post request works fine, however now I want to pass another value (role, Long) from the form to the controller that is not an attribute of the user model.
That part is not working.
Does anyone know why?
HTML:
<form action="add_user" method="post" class="form-horizontal" th:object="${user}">
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<input th:field="*{username}" class="form-control" placeholder="Person ID" type="text" name="id" id="id"/>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<input th:field="*{firstName}" class="form-control" placeholder="First Name" type="text" name="firstname" id="firstname"/>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<input th:field="*{lastName}" class="form-control" placeholder="Last Name" type="text" name="lastname" id="lastname"/>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<input th:field="*{password}" class="form-control" placeholder="Password" type="password" name="password" id="password"/>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<select th:field="${role}" class="form-control" id="role">
<option value="1">Admin</option>
<option value="2" >User</option>
</select>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-10">
<button type="submit" class="btn btn-success" value="Submit">Save</button>
</div>
</div>
</form>
Controller:
#RequestMapping(value = "/users", method = RequestMethod.GET)
public String showUsers(Model model)
model.addAttribute("user", new User());
model.addAttribute("role", new Long(2));
return "users";
}
And:
#RequestMapping(value = "/add_user", method = RequestMethod.POST)
public String handleNewUser(#ModelAttribute("user") User user, BindingResult bindingResult, Model model, long role) {
if (user != null) {
System.out.println(role);
userService.save(user);
}
return "redirect:/users";
}
th:field="${role}" means name of field in the model object, not its value. You probably want to write th:value="${role}" instead of this.

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