NotNull不工作，列（nullable=false）工作

Question

我有一个Spring实体，其中有一个用javax.validation.constraints中的@NotNull注释的字段

@Entity
public abstract class IdentifiableNamedEntity {
    @NotNull
    @Column(unique = true)
    private String name;
}

问题是，如果为name字段设置了空值，则将其存储在数据库中。但是，如果我按以下方式更改类，它会引发我想要接收的异常：

@Entity
public abstract class IdentifiableNamedEntity {
    @Column(unique = true, nullable=false)
    private String name;
}

<beans ...>
<context:property-placeholder location="classpath*:spring/database.properties" />
<context:component-scan base-package="com.lh.clte" />
<import resource="classpath:spring/applicationContext-persistence.xml" />
</beans>

<beans ...>
<import resource="classpath:spring/applicationContext-jpa.xml" />

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <property name="driverClassName" value="${database.driverClassName}" />
    <property name="url" value="${database.url}" />
    <property name="username" value="${database.username}" />
    <property name="password" value="${database.password}" />
    <property name="initialSize" value="3" />
    <property name="maxActive" value="10" />
</bean>

<tx:annotation-driven mode="proxy"
    transaction-manager="transactionManager" />
<bean class="org.springframework.orm.jpa.JpaTransactionManager"
    id="transactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<bean
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
    id="entityManagerFactory">
    <property name="persistenceUnitName" value="persistenceUnit" />
    <property name="dataSource" ref="dataSource" />
</bean>
</beans>

ApplicationContext-JPA

<beans ...>
<jpa:repositories base-package="com.lh.clte.repository" />
</beans>

由于我使用的是存储库,因此我还报告了corrisponding实体存储库：

@Repository
public interface IdentifiableNamedEntityRepository extends JpaSpecificationExecutor<IdentifiableNamedEntity>, JpaRepository<IdentifiableNamedEntity, Long> {
}

Answer 1

@NotNull是一个JSR303 Bean验证注释。它与数据库约束本身无关。此注释用于验证。@column(nullable=false)是将列声明为非空的方法。最后一个注释用于指示数据库模式的详细信息