Null value was assigned to a property of primitive
Exception:
org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.seven.domain.Book.printTime
緣由：數據庫裏printTime字段爲NULL
Java代碼java
<!--Hibernate映射文件中的字段--> <property name="printTime" type="long"><column name="print_time"/></property> [java] view plaincopyprint? <!--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>
其中的類型爲hibernate類型,在生成的Book類中，printTime字段爲long類型，爲基本類型，不能爲NULL.
解決方法：
第一種：數據庫字段不設置爲空；
第二種：手動修改映射文件，printTime使用Java類型Long,即type="java.lang.Long"，Book類中的字段也要改成Long。同理，int爲Integer.
第三種：在反向工程時使用Java類型，而不是hibernate類型數據庫
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