Hibernate给出了一个奇怪的ClassCast异常（使用Transformers）

最后，找到解决方案并不难，

我刚刚创建了自己的（自定义）ResultTransformer，并在setResultTransformer方法中进行了指定：

private Query createHibernateQueryForUnmappedTypeFactDto(String sqlQuery) throws HibernateException {    return FactCodeQueries.addScalars(createSQLQuery(sqlQuery)).setResultTransformer(new FactCodeDtoResultTransformer());    //return FactCodeQueries.addScalars(createSQLQuery(sqlQuery)).setResultTransformer(Transformers.aliasToBean(FactCodeDto.class));}

自定义结果转换器的代码：

package org.bamboomy.cjr.dao.factpre;import org.bamboomy.cjr.dto.FactCodeDto;import java.util.Date;import java.util.List;public class FactCodeDtoResultTransformer implements org.hibernate.transform.ResultTransformer {    @Override    public Object transformTuple(Object[] objects, String[] strings) {        FactCodeDto result = new FactCodeDto();        for (int i = 0; i < objects.length; i++) { setField(result, strings[i], objects[i]);        }        return result;    }    private void setField(FactCodeDto result, String string, Object object) {        if (string.equalsIgnoreCase("cdFact")) { result.setCdFact((String) object);        } else if (string.equalsIgnoreCase("cdFactSuffix")) { result.setCdFactSuffix((String) object);        } else if (string.equalsIgnoreCase("isSupplementCode")) { result.setIsSupplementCode((Boolean) object);        } else if (string.equalsIgnoreCase("isTitleCode")) { result.setIsTitleCode((Boolean) object);        } else if (string.equalsIgnoreCase("mustBeFollowed")) { result.setMustBeFollowed((Boolean) object);        } else if (string.equalsIgnoreCase("activeFrom")) { result.setActiveFrom((Date) object);        } else if (string.equalsIgnoreCase("activeTo")) { result.setActiveTo((Date) object);        } else if (string.equalsIgnoreCase("descFr")) { result.setDescFr((String) object);        } else if (string.equalsIgnoreCase("descNl")) { result.setDescNl((String) object);        } else if (string.equalsIgnoreCase("descDe")) { result.setDescDe((String) object);        } else if (string.equalsIgnoreCase("type")) { result.setType((String) object);        } else if (string.equalsIgnoreCase("idFact")) { result.setIdFact((Long) object);        } else if (string.equalsIgnoreCase("idParent")) { result.setIdParent((Long) object);        } else if (string.equalsIgnoreCase("isCode")) { result.setIsCode((Boolean) object);        } else { throw new RuntimeException("unknown field");        }    }    @Override    public List transformList(List list) {        return list;    }}

在hibernate3中，您可以将Aliasses设置为查询，但是在hibernate5中不能再执行此操作（如果我错了，请纠正我），因此aliasToBean是您只能在实际使用别名时使用的东西；我没有，所以例外。