弹簧将两个验证注释组合在一个中

validation java annotations spring spring-mvc

2022-09-03 06:20:38

我正在使用Spring+Hibernate+Spring-MVC。
我想定义一个自定义约束，将另外两个预定义的验证注释组合在一起：如下所示：@NotNull @Size

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

@NotNull
@Size(min=4)
public @interface JPasswordConstraint {
} // this is not correct. It's just a suggestion.

我想在我的表单模型中使用此注释。

public class ChangePasswordForm {

  @NotNull
  private String currentPass;

  @JPasswordConstraint
  private String newPass;

  @JPasswordConstraint
  private String newPassConfirm;
}

用户控制器.java

@RequestMapping(value = "/pass", method = RequestMethod.POST)
public String pass2(Model model, @Valid @ModelAttribute("changePasswordForm") ChangePasswordForm form, BindingResult result) {
    model.addAttribute("changePasswordForm", form);
    try {
        userService.changePassword(form);
    } catch (Exception ex) {
        result.rejectValue(null, "error.objec", ex.getMessage());
        System.out.println(result);
    }
    if (!result.hasErrors()) {
        model.addAttribute("successMessage", "password changed successfully!");
    }
    return "user/pass";
}

但它不起作用。它接受少于 4 个字符的密码。
我该如何解决这个问题？

答案 1

这有点晚了，但是组合验证注释的技术在

https://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/?v=5.4#section-constraint-composition

也许在撰写本文时它不可用，但解决方案如下

@NotNull
@Size(min=4)
@Target({ METHOD, FIELD, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = { })
@Documented
public @interface JPasswordConstraint {
    String message() default "Password is invalid";
    Class<?>[] groups() default { };
    Class<? extends Payload>[] payload() default { };
 }

答案 2

您可以添加

@ConstraintComposition

谁是默认的AND，如果有一天你想@NotNull或@Size你添加

@ConstraintComposition(OR)

编辑：这是一个结合和@Pattern(regexp = "[a-z]")@Size(min = 2, max = 3)

@ConstraintComposition(OR)
@Pattern(regexp = "[a-z]")
@Size(min = 2, max = 3)
@ReportAsSingleViolation
@Target({ METHOD, FIELD })
@Retention(RUNTIME)
@Constraint(validatedBy = { })
public @interface PatternOrSize {
    String message() default "";

 Class<?>[] groups() default { };

 Class<? extends Payload>[] payload() default { };

}