有時(shí)候我們需要自定義注解進(jìn)行校驗(yàn)前端的入?yún)?br> 依賴
<!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
demo 自定義注解
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = CheckDecisionValidator.class)
@Documented
public @interface DecisionCheck {
String message() default "請(qǐng)傳入符合要求的decision值";
Class<?>[] groups() default { };
Class<? extends Payload>[] payload() default { };
}
實(shí)現(xiàn)
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
public class CheckDecisionValidator implements ConstraintValidator<DecisionCheck, Byte> {
@Override
public void initialize(DecisionCheck constraintAnnotation) {
}
@Override
public boolean isValid(Byte value, ConstraintValidatorContext context) {
return DecisionEnum.valueOf(value) != null;
}
}
public enum DecisionEnum {
/**
* Decision-yes
*/
YES((byte)1,"同意"),
/**
* Decision-no
*/
NO((byte)0,"否認(rèn)");
private Byte type;
private String description;
DecisionEnum(Byte type, String description) {
this.type = type;
this.description = description;
}
public static DecisionEnum valueOf(Byte value) {
switch (value) {
case 0:
return DecisionEnum.NO;
case 1:
return DecisionEnum.YES;
default:
return null;
}
}
public Byte getType() {
return type;
}
public DecisionEnum setType(Byte type) {
this.type = type;
return this;
}
public String getDescription() {
return description;
}
public DecisionEnum setDescription(String description) {
this.description = description;
return this;
}
}
