Null value was assigned to a property of primitive type setter of
2011-05-18 10:37
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Null value was assigned to a property of primitive type setter of
Exception:org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.seven.domain.Book.printTime
原因：数据库里printTime字段为NULL
Java代码 <!--Hibernate映射文件中的字段-->
<property name="printTime" type="long"><column name="print_time"/></property>
<!--Hibernate映射文件中的字段--> <property name="printTime" type="long"><column name="print_time"/></property>
其中的类型为hibernate类型,在生成的Book类中，printTime字段为long类型，为基本类型，不能为NULL.
解决方法：
第一种：数据库字段不设置为空；
第二种：手动修改映射文件，printTime使用Java类型Long,即type="java.lang.Long"，Book类中的字段也要改为Long。同理，int为Integer.
第三种：在反向工程时使用Java类型，而不是hibernate类型。
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