Question

像spring-data-jpa有@NotNull注释可以在spring-data-mongodb中使用它。

Answer 1

String str; // The string is declared str = "whatever" // The string is initialized String string = "whatever" // The string is initialized and declared`本身可以与spring-data-mongodb一起使用。为此，您需要有适当的跟进。

在您的pom.xml中添加了JSR-303依赖项

javax.validation.constraints.NotNull

声明适当的验证器和验证器事件侦听器

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.3.4.Final</version>
</dependency>

在MongoDB POJO中添加@NotNull注释

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.core.mapping.event.ValidatingMongoEventListener;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;

@Configuration
public class Configuration {
    @Bean
    public ValidatingMongoEventListener validatingMongoEventListener() {
        return new ValidatingMongoEventListener(validator());
    }

    @Bean
    public LocalValidatorFactoryBean validator() {
        return new LocalValidatorFactoryBean();
    }
}

使用此配置和实现，如果您使用空值保留User对象，那么您将看到import org.springframework.data.annotation.Id; import org.springframework.data.mongodb.core.mapping.Document; import javax.validation.constraints.NotNull; @Document(collection = "user_account") public class User { @Id private String userId; @NotNull(message = "User's first name must not be null") private String firstName; @NotNull(message = "User's last name must not be null") private String lastName; }

失败

Spring数据mongoDb不是像Spring数据Jpa那样的空注释

1 个答案: