我想使用 HQL 或 Criterial 连接两个表
表格是
- 购物车表(cartId,bookid,customeremailid,quantity)
- 图书表(bookId,bookName,bookPrice,bookQuantity)
我的sql查询是这样的
select count(c.cartId) as cartId,b.bookName as bookName,c.customeremailid as customeremailid,sum(b.bookPrice)as c.price,c.quantity from Book b,Cart c where c.customeremailid='"+customeremailid+"' and b.bookId=c.bookid
这将给出 cartId
的计数和 bookPrice
的总和
我将此结果存储到 List<Cart>
中
以下是 cart POJO
变量
private int bookid,cartId;
private String customeremailid,bookName,bookDescription,image;
private int quantity;
private long price;
HQL 查询:
String sql="select count(c.cartId) as cartId,b.bookName as bookName,c.customeremailid as customeremailid,sum(b.bookPrice)as price,c.quantity from Book b,Cart c where c.customeremailid='"+customeremailid+"' and b.bookId=c.bookid";
Query q=s.createSQLQuery(sql);
Cartlist=q.setResultTransformer(Transformers.aliasToBean(Cart.class)).list();
for(Cart c :Cartlist)
{
System.out.println("in cart : "+c.getCartId());
System.out.println("in cart : "+c.getPrice());
}
我不知道如何在 Hibernate 中执行此操作
请建议 谢谢
最佳答案
使用下面的 hibernate Criteria 示例代码加入:
List cats = sess.createCriteria(Cat.class)
.createAlias("kittens", "kt")
.createAlias("mate", "mt")
.add( Restrictions.eqProperty("kt.name", "mt.name") )
.list();
关于java - 如何使用hibernate连接两个表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39052753/