如何使用 Hibernate 获取最后插入的 id
我想在 Hibernate 中获取最后插入的值的 id.
搜索后:
Long lastId = ((Long) session.createSQLQuery("SELECT LAST_INSERT_ID()").uniqueResult()).longValue();
但是下面的代码给了我这个错误:
<块引用>java.lang.ClassCastException: java.math.BigInteger 无法转换为 java.lang.Long
请分享你的想法!
解决方案
Long lastId = ((BigInteger) session.createSQLQuery("SELECT LAST_INSERT_ID()").uniqueResult()).longValue();
别忘了导入:
<块引用>导入 java.math.BigInteger;
解决方案错误很明显.它正在返回 BigInteger
而不是 long
您必须将其分配给 大整数
.并从中获取 longValue()
.p>
I want to fetch the last inserted value's id in Hibernate.
After search:
Long lastId = ((Long) session.createSQLQuery("SELECT LAST_INSERT_ID()").uniqueResult()).longValue();
But the following code gives me this error:
java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long
Please share your thoughts!
Solution
Long lastId = ((BigInteger) session.createSQLQuery("SELECT LAST_INSERT_ID()").uniqueResult()).longValue();
Don't forget to import:
import java.math.BigInteger;
解决方案
Error is pretty clear. It's returning BigInteger
and not long
You have to assign it to a BigInteger
. And get longValue()
from it.
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