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類
我必須使用到數據庫的調用休眠映射本地Java對象自己實現
List<Object> result = session.openSession().createSQLQuery(myNativeSQLQuery).list();
不,我可以在該列表
Iterator iter = result.iterator();
while(iter.hasNext()){
Object[] item = (Object[]) iter.next();
}
迭代但是,對象是沒有用的,爲自己和所以我想讓這個對象映射到我實現的類上。
public class MyClass {
private Long id;
private String name
private Set<MySecondClass> myList
public void myFunc(){
// do sth with that id or any other attribute mapped
}
}
我不想使用Hibernate註釋之類的東西,因爲定義的類將數據由定義原生SQL查詢XML文件被填滿。這樣我就想將生成的文檔實現爲mongodb,以便快速訪問數據。
你看到下面
<?xml version="1.0" encoding="UTF-8"?>
<mapping>
<resource>myResource</resource> <!-- the resource table in mysql where the base query is executed -->
<destination>myDestination</destination> <!-- the destination collection in mongodb -->
<document mapped="MyClass"> <!-- that docuemnt and the base query will be mapped on the class "MyClass"
<base sql="select id, name from table1" />
<reference id="_ID_" column="id" /> <!-- use the result from the base query and replace the placeholder _ID_ of all following sql querys with the value of id in that current iteration -->
<lists>
<myList mapped="MySecondClass" sql="select col1, col2 from table2 where referenceId=_ID_" /> <!-- each element of that listed will be mapped on MySecondClass and fills the property "myList"
</lists>
</document>
目前還不清楚你想達到什麼目的。 「在課堂上映射對象」意味着什麼? –
我從Hibernate獲得的對象的類型爲Object [],其中所有列都可用。所以從查詢「select id,name from table1」我會在每次迭代中得到一個_object [] obj_,其中列「id」在obj [0]處可用,但是我想將它映射到id屬性 – MatthiasLaug
是的,我知道對象數組中的select語句結果。對於'在id屬性上映射'意味着什麼? –