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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"
Answer
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));
}
// ...
}