动态实例化查询结果-优快云博客

本文介绍了一种使用Hibernate进行动态实例化查询的方法，通过构造特定的查询语句来获取所需的数据，并将其封装到自定义的CustomerRow类中。这种方法不需要目标类成为持久化类，简化了对象-关系映射。

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动态实例化查询结果
摘自《精通Hibernate》一书

package mypack;

import java.io.Serializable;
public class CustomerRow implements Serializable {

    private Long id;

    private String name;

    private String orderNumber;

   public CustomerRow(Long id,String name, String orderNumber) {
        this.id=id;
        this.name = name;
        this.orderNumber = orderNumber;
    }

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

   public String getOrderNumber() {
        return this.orderNumber;
    }

    public void setOrderNumber(String orderNumber) {
        this.orderNumber = orderNumber;
    }

}


Iterator it = serssion.createQuery("select new mypack.CustomerRow(c.id, c.name, o.orderNumber) from Customer c join c.orders o where o where o.orderNumber like 'T%'").list().iterator();
while(it.hasNext()){
	CustomerRow row = (CustomerRow)it.next();
	Long id = row.getId();
	String name = row.getName();
	....
}