Atitit.ati?orm的設計and架構總結?適用于java?c#?php版

?

1.?Orm的目標 1

1.1.?動態obj 1

1.2.?Hb的api(meger,save,update,del) 1

2.?Orm的概念 1

3.?動態obj 2

4.?參考 4

?

?

?

?

?

?

1.?Orm的目標

1.1.?動態obj

1.2.?Hb的api(meger,save,update,del)

2.?Orm的概念

saveOrUpdate后的對象會納入session的管理，對象的狀態會跟數據庫同步。再次查詢該對象會直接從session中取，merge后的對象不會納入session的管理，再次查詢該對象還是會從數據庫中取。.

?

對于hibernate。它的對象有三種狀態。transient、persistent、detached

下邊是常見的翻譯辦法：

transient：瞬態或者自由態

persistent：持久化狀態

detached：脫管狀態或者游離態

脫管狀態的實例能夠通過調用save()、persist()或者saveOrUpdate()方法進行持久化。

persist和merge：?沒有和數據庫進行同步

save和update：????處理后的數據處于持久狀態。換句話說，調用sql進行和數據庫同步的步驟。

總的來說，對于長事務的處理，應該使用persist和merge。降低數據庫交互

?

作者::?老哇的爪子?Attilax?艾龍，??EMAIL:1466519819@qq.com

轉載請注明來源：?http://blog.csdn.net/attilax

?

?

3.?動態obj

?

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");

?

?

????????????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);

?

????????????AtiOrmX?ormx?=?(AtiOrmX)new?IocX().getBean("ormx");

?

????????????return?ormx.save(ormObj);

????????}

?

?

-------code

public??class?AtiOrmX

????{

??????public?Ioc?ioc;

?

??????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);

??????}

}

?

?

?

?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"];

?

????????????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);

????????????}

?

????????????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;

????????}

????}

?

?

?

????public?class?DbUtil

????{

?

????????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;

????????}

?

?

------ioc

?

?

??????????facMap.Add("dbx",?()?=>

??????????{

?

??????????????DbUtil?dbx?=?new?DbUtil();

??????????????return?dbx;

?

??????????});

?

4.?參考

hibernate的各種保存方式的差別?（save_persist_merge）?-?晝不懂夜的黑的日志?-?網易博客.html



總結

以上是生活随笔為你收集整理的Atitit.ati orm的设计and架构总结 适用于java c# php版的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。