Atitit.ati?orm的设计and架构总结?适用于java?c#?php版
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1.2.?Hb的api(meger,save,update,del) 1
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1.?Orm的目标
1.1.?动态obj
1.2.?Hb的api(meger,save,update,del)
2.?Orm的概念
saveOrUpdate后的对象会纳入session的管理，对象的状态会跟数据库同步。再次查询该对象会直接从session中取，merge后的对象不会纳入session的管理，再次查询该对象还是会从数据库中取。.
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对于hibernate。它的对象有三种状态。transient、persistent、detached
下边是常见的翻译办法：
transient：瞬态或者自由态
persistent：持久化状态
detached：脱管状态或者游离态
脱管状态的实例能够通过调用save()、persist()或者saveOrUpdate()方法进行持久化。
persist和merge：?没有和数据库进行同步
save和update：????处理后的数据处于持久状态。换句话说，调用sql进行和数据库同步的步骤。
总的来说，对于长事务的处理，应该使用persist和merge。降低数据库交互
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作者::?老哇的爪子?Attilax?艾龙，??EMAIL:[email protected]
转载请注明来源：?http://blog.csdn.net/attilax
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3.?动态obj
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Proj.amazon?.spider
?public?object?hanlder(object?obj,?ClassLibrary1.com.attilax.lang.FilterFilterChain?nextChain)
????????{
????????????Dictionary<string,?Object>?ormObj?=?new?Dictionary<string,?object>();
????????????ormObj.Add("table",?"ecs_goods");
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????????????Dictionary<string,?Object>?flds_frm?=?(Dictionary<string,?Object>)obj;
????????????Dictionary<string,?Object>?flds?=?new?Dictionary<string,?object>();
????????????flds.Add("goods_name",?flds_frm["title"]);
????????????flds.Add("goods_desc",?"goods_descxxx");
??????????//??flds.Add("good_nam
????????????ormObj.Add("fields",?flds);
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????????????AtiOrmX?ormx?=?(AtiOrmX)new?IocX().getBean("ormx");
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????????????return?ormx.save(ormObj);
????????}
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-------code
public??class?AtiOrmX
????{
??????public?Ioc?ioc;
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??????public?Object?save(Object?ormObj)
??????{
??????????String?sql?=?SqlX.getSql(ormObj);
??????????Console.WriteLine("--orm?sql:"?+?sql);
??????????DbUtil?dbx?=?(DbUtil)ioc.getBean("dbx");
??????return?????dbx.exec(sql);
??????}
}
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?public?class?SqlX
????{
????????public?static?string?getSql(object?ormObj)
????????{
??????????//??throw?new?NotImplementedException();
????????????Dictionary<String,?Object>?ormobjMap?=?((Dictionary<String,?Object>)ormObj)?;
????????????Dictionary<String,?Object>?fldMap?=?(Dictionary<String,?Object>)ormobjMap["fields"];
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????????????System.Collections.Generic.List<object>?flds?=?new?List<object>();
????????????System.Collections.Generic.List<object>?fld_vals?=?new?List<object>();
????????????foreach?(var?item?in?fldMap)
????????????{
????????????????flds.Add(item.Key);
????????????????fld_vals.Add("‘"+?item.Value+"‘");
????????????????Console.WriteLine(item.Key?+?item.Value);
????????????}
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????????????String?fld_s?=?ListX.join(",",?flds);
????????????String?v_s?=?ListX.join(",",?fld_vals);
????????????String?sql?=?"?insert?into?"?+?ormobjMap["table"]?+?"(@flds)values(@vs)";
????????????sql?=?sql.Replace("@flds",?fld_s);?sql?=?sql.Replace("@vs",?v_s);
????????????return?sql;
????????}
????}
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????public?class?DbUtil
????{
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????????public?Object?exec(string?sql)
????????{
????????????mysqlConnection?mysqlcon?=?this.getmysqlcon();
????????????mysqlcon.Open();
????????????MySqlCommand?mysqlcom?=?new?MySqlCommand(sql,?mysqlcon);
????????????int?r?=?mysqlcom.ExecuteNonQuery();
????????????mysqlcom.Dispose();
????????????mysqlcon.Close();
????????????mysqlcon.Dispose();
????????????return?r;
????????}
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------ioc
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??????????facMap.Add("dbx",?()?=>
??????????{
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??????????????DbUtil?dbx?=?new?DbUtil();
??????????????return?dbx;
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??????????});
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4.?參考
hibernate的各种保存方式的差别?（save_persist_merge）?-?昼不懂夜的黑的日志?-?网易博客.html