[英]Hibernate Query convert count to int?
我收到此错误:
java.lang.ClassCastException:无法将java.math.BigInteger强制转换为java.lang.Integer
我的想法是检查一个选择的计数值,但是我很难转换它。
附加以下代码。
有任何想法吗?
public List<Map<String, Object>> contaQuery(String sqlCount) throws MensagemException {
Session session = HibernateUtil.getSession();
try {
String sql = sqlCount;
int query = ((Integer) session.createSQLQuery("select count(*) from (" + sqlCount + ") as subquery")
.uniqueResult());
if (query <= 50000) {
return rodarQuery(sql);
} else {
throw new MensagemException("Too many Registers");
}
} finally {
session.close();
}
}
如Farlan注释所述,通过调用intValue()
将BigInteger返回值从uniqueResult转换为Integer。
final Query query;
final BigInteger bigResult;
final int result;
query = session.createSQLQuery("select count(*) from (" + sqlCount + ") as subquery");
bigResult = (BigInteger)query.uniqueResult();
if (bigResult != null)
{
result = bigResult.intValue();
}
else
{
result = ...some value of your choosing, perhaps 0.
)
if (result < 50000)
... stuff
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