java lang ClassCastException Ljava lang Object cannot be

阿新 • • 發佈：2018-12-21

本例錯誤是Hibernate產生

Session session= sessionFatory.getCurrentSession();SQLQuery sqlquery= session.createSQLQuery("select * from FRM_FIELD");List<FrmField> fields = sqlquery.list();

上面的查詢是返回標量值的，Object型別，也就是從resultset中返回的”裸”資料。

如果使用原生sql語句進行query查詢時，hibernate是不會自動把結果包裝成實體的。

下面通過加上 addEntity() 讓原生查詢返回實體物件。

sqlquery.addEntity(FrmField.class);

標量和實體查詢對比

這裡寫圖片描述

java lang ClassCastException Ljava lang Object cannot be

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java lang ClassCastException Ljava lang Object cannot be

本例錯誤是Hibernate產生Session session= sessionFatory.getCurrentSession();SQLQuery sqlquery= session.createSQLQuery("select * from FRM_FIELD"

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java lang ClassCastException Ljava lang Object cannot be

java lang ClassCastException Ljava lang Object cannot be

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關於(Ljava/lang/String;Ljava/lang/String;)Ljava/util/List; 錯誤

java lang ClassCastException Ljava lang Object cannot be

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