Cannot show mysql data using jpa and thymeleaf - spring

Question

I'm very new to Spring. I'm trying to build an user management web app.
Here is the controller
#Controller
#RequestMapping("/index")
public class UserManagementController {
#Autowired
private UserManagementRepository userManagementRepository;
#RequestMapping(method= RequestMethod.GET)
public ModelAndView index(Model model){
ArrayList<Staff> staffList = (ArrayList<Staff>) userManagementRepository.findAll();
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("staffList", staffList);
return modelAndView;
}
}
The model
#Entity
#Table(name="staff")
#Data
public class Staff {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String name;
private int age;
private String department;
private String sex;
private String status;
}
html file
<tbody>
<tr th:each="staff, state : ${staffList}">
<td th.text="${staff.id}"></td>
<td th.text="${staff.name}"></td>
<td th.text="${staff.age}"></td>
<td th.text="${staff.department}"></td>
<td th.text="${staff.department}"></td>
<td th.text="${staff.status}"></td>
</tr>
and finally the application.properties
spring.datasource.url=jdbc:mysql://localhost:3306/user_management
spring.datasource.username=root
spring.datasource.password=
When i run the project, the table only shows the header and the body is totally blank.

Answer 1

I am not 100% sure but can you try to make all attributes in model public or generate getters and then change your code like:
<td th.text="${staff.getId()}"></td>

Answer 2

Do this:
<tr th:each="staff : ${staffList}">
That will solve your problem If not then comment below and tell whats the problem.

Answer 3

This should work :
<tr th:each="staff : ${staffList}">
<td th:text="${staff.id}"></td>
...
</tr>
If it doesn't, look with a debugger if the value staffList in your controller is not empty or null. If it is, then you have an issue with your database connection or request.