如果有一个新的数据持久化框架，您希望他能帮你解...

如果有一个新的数据持久化框架，您希望他能帮你解决那些问题或者具有哪些功能？

1、不需要复杂的配置文件；
2、可以很方便的对项目进行重构；
3、良好的性能；
4、支持复杂的查询包括统计查询；[/u]

hibernate不满足你的要求么？

第4条可能有些困难！

hibernate是一个很不错的框架，但是我觉得有两个问题

1、过分的依赖于配置文件，不借助其它工具很难处理；
2、查询语句基于字符串，对于项目重构很不利。

我觉得如果我们能够使用程序语言来书写sql查询和更新语句会更好，我是一个喜欢简单的人，看到那么多的配置文件我就头疼~_~.

其实，第四条也不是不能实现，那只是思路的问题，我正在尝试做一个数据持久化框架，已经可以实现比较复杂的统计查询，目前正在做最后的测试，测试完了以后，我将公布导网上。

   其实我学java也没多久，有很多东西不是很懂。这里气氛很不错，可以看得出站长技术也不错，而且对网站很热心。为大家提供了一个可以进行技术流的场所值得大家表扬。也希望能够有高手愿意做我的技术顾问，使我能够尽快的完善第一版。

public class InnerJionQuery extends Query {
	
	public Field customerID;
	public Field orderID;
	public Field companyName;
	public Field contactName;
	public Field orderDate;
	public Field employeeID;
	
	
	public InnerJionQuery();{
		Customers customers = (Customers); SessionFactory.getResourceRef(Customers.class);;
		Orders orders = (Orders);SessionFactory.getResourceRef(Orders.class);;

		customerID =customers.customerID;
		companyName = customers.companyName;
		contactName = customers.contactName;
		orderID= orders.orderID;
		orderDate =orders.orderDate;
		employeeID =orders.employeeID;
		
		select_all();;
		from(customers.inner_jion(orders);.on(customers.customerID.eq(orders.customerID);););;
		order_by(customerID.asc(););;
	}
	public static void main(String[] args); {
		InnerJionQuery testQuery = (InnerJionQuery);SessionFactory.getResource(InnerJionQuery.class);; 
		SessionContext dbc;
		try {
			dbc = SessionFactory.getContext();;
			try{
				testQuery.setAbsolutePage(1);;
				testQuery.setPageSize(5);;
				dbc.openQuery(testQuery,testQuery.companyName.like("a%");.and(testQuery.orderID.gte(10926););,testQuery.orderID.asc();._(testQuery.companyName););;
				while (testQuery.next(););{
					System.out.print(testQuery.customerID.getValue();.getString();+"   ");;
					System.out.print(testQuery.orderID.getValue();.getInt();+"   ");;
					System.out.println(testQuery.orderDate.getValue();.getString(););;
				}
			}finally{
				try {
					dbc.setComplete();;
				}catch (DudoJException e1); {
					e1.printStackTrace();;
				}
			}
		} catch (SqlException e); {
			e.printStackTrace();;
		} catch (Exception e); {
			e.printStackTrace();;
		}
	}
}

public class GroupByQuery extends Query {
	
	public Field maxFreight;	
	public Field minFreight;	
	public Field avgFreight;	
	public Field countFreight;	
	public Field countBigFreight;	
	public Field sumFreight;	
	public Field stdevFreight;	
	public Field stdevpFreight;	
	public Field varFreight;	
	public Field varpFreight;	
	public Field orderID;
	
	public GroupByQuery();{
		Orders orders = (Orders);SessionFactory.getResourceRef(Orders.class);;
		orderID = orders.orderID;
		maxFreight = max(orders.freight);.div(10);.toField();;
		minFreight = CalcField.create(min(orders.freight.add(70);););;
		avgFreight = CalcField.create(avg(distinct(orders.freight);););;
		countFreight = CalcField.create(count(orders.freight););;
		countBigFreight = CalcField.create(count_big(orders.freight););;
		sumFreight = CalcField.create(sum(orders.freight););;
		stdevFreight = CalcField.create(stdev(orders.freight););;
		stdevpFreight = CalcField.create(stdevp(orders.freight););;	
		varFreight = CalcField.create(var(orders.freight););;	
		varpFreight =CalcField.create(varp(orders.freight););;	
		
		select_all();;
		from(orders);;
		group_by(orderID);;
		having(minFreight.gt(1););;
	}
	public static void main(String[] args); {
		SessionContext dbc;
		try {
			dbc = SessionFactory.getContext();;
			try{
				dbc = SessionFactory.getContext();;
				GroupByQuery test = (GroupByQuery);SessionFactory.getResource(GroupByQuery.class);;
				while (test.next(););{
					System.out.print(test.orderID.getValue();.getString();+"   ");;
					System.out.print(test.maxFreight.getValue();.getString();+"   ");;
					System.out.print(test.minFreight.getValue();.getString();+"   ");;
					System.out.print(test.avgFreight.getValue();.getString();+"   ");;
					System.out.print(test.countFreight.getValue();.getString();+"   ");;
					System.out.print(test.countBigFreight.getValue();.getString();+"   ");;
					System.out.println(test.sumFreight.getValue();.getString();+"   ");;
				}
			}finally{
				try {
					dbc.setComplete();;
				}catch (Exception e1); {
					e1.printStackTrace();;
				}
			}
		} catch (SqlException e); {
			e.printStackTrace();;
		} catch (Exception e); {
			e.printStackTrace();;
		}
	}
	
}

1、配置文件复杂吗？你用过EJB就知道什么叫做复杂了。

2、 Hibernate2.1的 Criteria Queries

配置文件是一方面，hibernate我用的不是很熟，无权做出更多的评价。我看到的hibernate构造的查询语句都是基于字符串的，虽然说是基于对象的查询，但是查询语句中的对象已经和java中的对象有所区别，那只是个概念而已，如果在项目中间，要更改某个类名，是否要手动逐个更改相关查询？至少目前的ide都不理会字符串中的类名。不知我说的对不对。

你说的那是HQL，你可以不用HQL，改用Criteria Queries，只是Criteria Queries的功能还比较弱，实现不了类似HQL那么强大的如统计查询的功能。