错误-已处理新的全局异常！消息= java.util.LinkedHashMap无法转换为java.math.BigInteger

问题描述

PatientId的数据类型在实体对象中为BigInteger

private BigInteger patientId;

代码：

    @Override
    public List<ChatRoomHistory> getLastChatDetails(List<String> patientIds) {
    String queryStr = "FROM ChatRoomHistory where type = 'NO' and patientId in :patientIds ORDER BY chatCloseTime DESC";
    TypedQuery<ChatRoomHistory> query = sessionFactory.getobject().getCurrentSession().createquery(queryStr,ChatRoomHistory.class);
    query.setParameter("patientIds",patientIds);
    return query.getResultList();
}

错误

    2020-08-16 19:52:27,939 [http-nio-8080-exec-5:] c.t.c.u.e.GlobalExceptionHandler.handleException:243
                ERROR - new Global exception handled!    Message = java.util.LinkedHashMap cannot be cast to java.math.BigInteger
java.lang.classCastException: java.util.LinkedHashMap cannot be cast to java.math.BigInteger
    at org.hibernate.type.descriptor.java.BigIntegerTypeDescriptor.unwrap(BigIntegerTypeDescriptor.java:19)
    at org.hibernate.type.descriptor.sql.DecimalTypeDescriptor$1.dobind(DecimalTypeDescriptor.java:47)
    at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:74)
    at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:280)

解决方法

就像评论中所说的那样，您不能将String列表作为用于数字字段的参数传递。

您应将参数声明为

raise SystemExit(0)

,

您可以通过以下方式更正您的方法：

@Override
public List<ChatRoomHistory> getLastChatDetails(List<BigInteger> patientIds)
{
    String hql = "select c from ChatRoomHistory c where c.type = 'NO' and c.patientId in :patientIds ORDER BY c.chatCloseTime DESC";
    TypedQuery<ChatRoomHistory> query = sessionFactory.getCurrentSession().createQuery(hql,ChatRoomHistory.class);
    query.setParameter("patientIds",patientIds);
    return query.getResultList();
}

评论：

1. 即使HQL不需要select_clause，也要generally good practice包含一个。

2. 值列表不能为空； （请参见this）。