接收數據的JAVA BEAN通常需要驗證其中字段的正確性，如不準為空，符合EMAIL格式等。
JSR-303 Bean Validation則提供了這樣的便捷。
只要在JAVA BEAN中需要驗證的字段加@NotNull這種標簽，然后在SERVISE中的輸入參數中加@Valid標簽，則就激活驗證流程。
也可以編程的方式自己驗證：
@MessageEndpoint
//@Validated
public class MqMessageCcdValidator {
private static final Logger LOGGER = LoggerFactory.getLogger(MqMessageCcdValidator.class);
@Autowired
private Validator validator;
@ServiceActivator
public MqMessage<CcdRequest> validate(/* @Valid */ Message<MqMessage<CcdRequest>> requestMessage) {
Set<ConstraintViolation<MqMessage<CcdRequest>>> set = validator.validate(requestMessage.getPayload());
if(CollectionUtils.isNotEmpty(set)) {
CompositeException compositeException = new CompositeException();
set.forEach(
constraintViolation -> {
LOGGER.info("{}", constraintViolation);
ReqInfoValidationException exception =
new ReqInfoValidationException(constraintViolation.getMessage());
compositeException.addException(exception);
}
);
throw new MessageHandlingException(requestMessage, compositeException);
}
return requestMessage.getPayload();
}
}
自定義驗證規則
可用標簽來做，以下為驗證手機號的規則：
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.validation.Constraint;
import javax.validation.Payload;
import javax.validation.ReportAsSingleViolation;
import javax.validation.constraints.Pattern;
@Retention(RUNTIME)
@Target(value = { ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE })
@Constraint(validatedBy = {})
@ReportAsSingleViolation
@Pattern(regexp = "^1[3-9]\\d{9}$")
public @interface ChinaPhone {
String message() default "Invalid Chinese mobile No.";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
如果比較復雜的驗證規則，則參見：
https://reflectoring.io/bean-validation-with-spring-boot/#implementing-a-custom-validatorHow to use Java Bean Validation in Spring Boot
https://nullbeans.com/how-to-use-java-bean-validation-in-spring-boot/Complete Guide to Validation With Spring Boot
https://reflectoring.io/bean-validation-with-spring-boot/Spring JMS Validate Messages using JSR-303 Bean Validation
https://memorynotfound.com/spring-jms-validate-messages-jsr-303-bean-validation/Spring REST Validation Example
https://mkyong.com/spring-boot/spring-rest-validation-example/
Spring Boot 整合 Bean Validation 校驗數據
https://blog.csdn.net/wangzhihao1994/article/details/108403732