我们如何在Spring Boot中使用任何一种验证? [英] How can we use either of the validation in spring boot?
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问题描述
我的bean中有两个变量,我想填写名称或手机,它们不能同时为null.
I have two variables in my bean and I want either name or mobile to be filled, they cant be both null at the same time.
@NotNull
private String name;
@NotNull
private String mobile;
我该如何实现?
推荐答案
您需要为此编写一个自定义注释并在类上使用
You need to write a custom annotation for this and use on class
@AtLeastOneNotEmpty(fields = {"name", "phone"})
public class User{
自定义注释实现
@Constraint(validatedBy = AtLeastOneNotEmptyValidator.class)
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface AtLeastOneNotEmpty {
String message() default "At least one cannot be null";
String[] fields();
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
和自定义注释的验证器
public class AtLeastOneNotEmptyValidator
implements ConstraintValidator<AtLeastOneNotEmpty, Object> {
private String[] fields;
public void initialize(AtLeastOneNotEmpty constraintAnnotation) {
this.fields = constraintAnnotation.fields();
}
public boolean isValid(Object value, ConstraintValidatorContext context) {
List<String> fieldValues = new ArrayList<String>();
for (String field : fields) {
Object propertyValue = new BeanWrapperImpl(value).getPropertyValue(field);
if (ObjectUtils.isEmpty(propertyValue)) {
fieldValues.add(null);
} else {
fieldValues.add(propertyValue.toString());
}
}
return fieldValues.stream().anyMatch(fieldValue -> fieldValue!= null);
}
}
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