我正在学习 Spring 框架和 Thymeleaf。我已经知道如何使用类似的东西来显示字段错误${#fields.errors("xx")}
。但是,我对如何在 Thymeleaf 中显示对象错误消息感到困惑。
这是我的UserForm class:
@PasswordMatches
public class UserForm {
@NotNull
@NotEmpty
private String username;
@NotNull
@NotEmpty
private String password;
@NotNull
@NotEmpty
private String matchingPassword;
@NotNull
@NotEmpty
@ValidEmail
private String email;
/* setter and getter methods */
这是我的密码匹配注解:
@Target({ElementType.TYPE, ElementType.FIELD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = PasswordMatchesValidator.class)
@Documented
public @interface PasswordMatches {
String message() default "Passwords don't match";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
class PasswordMatchesValidator implements ConstraintValidator<PasswordMatches, Object> {
@Override
public void initialize(PasswordMatches constraintAnnotation) {
}
@Override
public boolean isValid(Object obj, ConstraintValidatorContext context){
UserDto user = (UserDto) obj;
return user.getPassword().equals(user.getMatchingPassword());
}
}
这是我的控制器 method:
@RequestMapping(value="/registration", method=RequestMethod.POST)
public ModelAndView registerUserAccount(@ModelAttribute("user") @Valid UserForm userForm,
BindingResult result, WebRequest request, Errors errors) {
if (!result.hasErrors()) {
return new ModelAndView("registerSuccess");
}
else {
return new ModelAndView("registration", "user", userForm);
}
}
现在这是我的问题:如果password场和确认通过字段不匹配,如何获取 Thymeleaf 中类级别注释返回的默认错误消息?