Null value was assigned to a property of primitive type setter of"原因及解决方
2011-11-21 09:40
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在action请求数据的过程中报出"Null value was assigned to a property of primitive type setter of"错误,搜索之后发现是因为数据库里相应的字段为NULL。
例如:
Java代码
<!--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。
例如:
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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