休眠映射 java Long 到 MySQL BIGINT 错误
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hibernate map java Long to MySQL BIGINT error
提问by QuanNH
i have a table with id field type BIGINT in MySQL
我在 MySQL 中有一个 id 字段类型为 BIGINT 的表
in hibernate object, i use java Long type for this field
在休眠对象中，我为此字段使用 java Long 类型
but when run program, it throw exception:
Expected: class java.lang.Long, got class java.lang.Integer
但是当运行程序时，它抛出异常：
Expected: class java.lang.Long, got class java.lang.Integer
how to map MySQL BINGINT datatype in hibernate ?
如何在休眠中映射 MySQL BINGINT 数据类型？
采纳答案by Pascal Thivent
but when run program, it throw exception: Expected: class java.lang.Long, got class java.lang.Integer
但是当运行程序时，它抛出异常：预期：类 java.lang.Long，得到类 java.lang.Integer
Using a Longfor a BIGINT is correct and the above error suggests that you are somehow passing an Integerwhere a Longis expected somewhere in your code. Double check your code.
Long对 BIGINT使用 a是正确的，上面的错误表明您以某种方式在代码中的某处传递了IntegeraLong预期的位置。仔细检查您的代码。
回答by mosterme
Does it help if you add a columnDefinitionlike columnDefinition = “bigint(20)″to your mapping parameters?
如果在映射参数中添加columnDefinition 之类的 columnDefinition = “bigint(20)”会有所帮助 吗？
