Dfyjkt

I created a form with using Thymeleaf which listened by controller. When I input a string that contains leading or trailing spaces (example: " abc
".), the string auto trimmed in the controller (example: "abc".). But I want to keep these leading or trailing spaces even the value passed into controller. How can I do that?

Example code:

Form with using Thymeleaf:

<form role="form" action="/" method="post" autocomplete="off" th:action="@/change-password" th:object="$form">
 <div>
 <label for="new-pass" th:text="#password.newPassword">New password</label>
 <input type="password" th:field="*password" th:placeholder="#password.newPassword" required="required" />
 </div>
 <div>
 <button type="submit" th:text="#confirm">Change</button>
 <a href="/" th:href="@/" th:text="#cancel">Cancel</a>
 </div>
</form>

Controller for page:

@RequestMapping(value = "/change-password", method = RequestMethod.GET)
public String changePassword(@ModelAttribute("form") ChangeMyPasswordForm form) 
 return "/account/change-pass";

Controller that handling form action:

@RequestMapping(value = "/change-password", method = RequestMethod.POST)
public void changeSelfPassword(ChangeMyPasswordForm form) 
 System.out.println(form.getPassword());

Class ChangeMyPasswordForm:

public class ChangeMyPasswordForm 

 private String password;

 public String getPassword() 
 return password;
 

 public void setPassword(String password) 
 this.password = password;
 

The String that input in the form:

" abc "

Expected result in the controller System.out.println:

" abc "

Actual result:

"abc"

First you need to check where the values are being truncated thymeleaf or Spring?

You can do that by printing values using jquery/javascript before form submission.

By default spring it doesn't trim the parameters. just check that you are NOT using StringTrimmerEditor like below.

@Controller
public class MyFormController 

 @InitBinder
 public void initBinder(WebDataBinder binder) 
 binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
 

 // ...