锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#x4E9A;&#x6D32;&#x9AD8;&#x6E05;&#x56FD;&#x4EA7;&#x62CD;&#x7CBE;&#x54C1;&#x719F;&#x5973;&#x2C;&#x4E9A;&#x6D32;&#x5348;&#x591C;&#x5728;&#x7EBF;&#x7535;&#x5F71;&#x2C;&#x4E9A;&#x6D32;&#x56FD;&#x4EA7;&#x6210;&#x4EBA;&#x4E45;&#x4E45;&#x7B2B;&#x4E00;&#x9875;</title><link>http://www.tkk7.com/victor/category/572.html</link><description>浜彈鍠у殻 瀹変簬騫抽潤</description><language>zh-cn</language><lastBuildDate>Tue, 27 Feb 2007 17:30:23 GMT</lastBuildDate><pubDate>Tue, 27 Feb 2007 17:30:23 GMT</pubDate><ttl>60</ttl><item><title>楂樼駭 DAO 緙栫▼</title><link>http://www.tkk7.com/Victor/articles/1674.html</link><dc:creator>Victor</dc:creator><author>Victor</author><pubDate>Fri, 04 Mar 2005 01:21:00 GMT</pubDate><guid>http://www.tkk7.com/Victor/articles/1674.html</guid><wfw:comment>http://www.tkk7.com/Victor/comments/1674.html</wfw:comment><comments>http://www.tkk7.com/Victor/articles/1674.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/Victor/comments/commentRss/1674.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/Victor/services/trackbacks/1674.html</trackback:ping><description><![CDATA[<BLOCKQUOTE>J2EE 寮�鍙戜漢鍛樹嬌鐢ㄦ暟鎹闂璞?Data Access Object DAO)璁捐妯″紡錛屼互渚垮皢浣庣駭鍒殑鏁版嵁璁塊棶閫昏緫涓庨珮綰у埆鐨勪笟鍔￠�昏緫鍒嗙銆傚疄鐜?DAO 妯″紡娑夊強姣旂紪鍐欐暟鎹闂唬鐮佹洿澶氱殑鍐呭銆傚湪鏈枃涓紝Java 寮�鍙戜漢鍛?Sean C. Sullivan 璁ㄨ浜?DAO 緙栫▼涓笁涓父甯歌蹇界暐鐨勬柟闈細浜嬪姟鐣屽畾銆佸紓甯稿鐞嗗拰鏃ュ織璁板綍銆?/BLOCKQUOTE>
<P>鍦ㄨ繃鍘?18 涓湀涓紝鎴戝弬鍔犱簡涓�涓敱鏈夋墠鍗庣殑杞歡宸ョ▼甯堢粍鎴愮殑灝忕粍錛屾瀯寤哄畾鍒剁殑銆佸熀浜?Web 鐨勪緵搴旈摼綆＄悊搴旂敤紼嬪簭銆傛垜浠殑搴旂敤紼嬪簭璁塊棶鑼冨洿騫挎硾鐨勬寔涔呮�ф暟鎹紝鍖呮嫭閰嶉�佺姸鎬併�佷緵搴旈摼琛￠噺(metrics)銆佸簱瀛樸�佽揣榪愬彂紲ㄣ�侀」鐩鐞嗘暟鎹拰鐢ㄦ埛淇℃伅銆傛垜浠敤 JDBC API 榪炴帴鍒版垜浠叕鍙哥殑涓嶅悓鏁版嵁搴撳鉤鍙頒笂錛屽茍鍦ㄦ暣涓簲鐢ㄧ▼搴忎腑浣跨敤 DAO 璁捐妯″紡銆?/P>
<P>鍥?1 鏄劇ず浜嗗簲鐢ㄧ▼搴忓拰鏁版嵁婧愪箣闂寸殑鍏崇郴錛?/P>
<P><A name=IDAYBMIB><B>鍥?1. 搴旂敤紼嬪簭鍜屾暟鎹簮</B></A><BR><IMG height=176 alt=搴旂敤紼嬪簭鍜屾暟鎹簮 src="http://www-900.ibm.com/developerWorks/cn/java/j-dao/images/jwebapps.jpg" width=282></P>
<P>鍦ㄦ暣涓簲鐢ㄧ▼搴忎腑浣跨敤鏁版嵁璁塊棶瀵硅薄(DAO)浣挎垜浠彲浠ュ皢搴曞眰鏁版嵁璁塊棶閫昏緫涓庝笟鍔￠�昏緫鍒嗙寮�鏉ャ�傛垜浠瀯寤轟簡涓烘瘡涓�涓暟鎹簮鎻愪緵 GRUD (鍒涘緩銆佽鍙栥�佹洿鏂般�佸垹闄?鎿嶄綔鐨?DAO 綾匯�?/P>
<P>鍦ㄦ湰鏂囦腑錛屾垜灝嗕負鎮ㄤ粙緇嶆瀯寤烘洿濂界殑 DAO 綾葷殑 DAO 瀹炵幇絳栫暐鍜屾妧鏈�傛洿紜垏鍦拌錛屾垜灝嗚璁烘棩蹇椼�佸紓甯稿鐞嗗拰浜嬪姟鐣屽畾銆傛偍灝嗗鍒板浣曞皢榪欎笁鑰呯粨鍚堝埌鑷繁鐨?DAO 綾諱腑銆傛湰鏂囧亣瀹氭偍鐔熸倝 JDBC API銆丼QL 鍜屽叧緋繪暟鎹簱緙栫▼銆?/P>
<P>鎴戜滑灝嗕互瀵?DAO 璁捐妯″紡鍜屾暟鎹闂璞＄殑姒傝堪寮�濮嬨�?/P>
<P><A name=IDAHCMIB><span id="nb99tb9"    class=atitle2>DAO 鍩虹</SPAN></A><BR>DAO 妯″紡鏄爣鍑?J2EE 璁捐妯″紡涔嬩竴銆傚紑鍙戜漢鍛樼敤榪欑妯″紡灝嗗簳灞傛暟鎹闂搷浣滀笌楂樺眰涓氬姟閫昏緫鍒嗙寮�銆備竴涓吀鍨嬬殑 DAO 瀹炵幇鏈変互涓嬬粍浠訛細</P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>涓�涓?DAO 宸ュ巶綾?
<LI>涓�涓?DAO 鎺ュ彛 
<LI>涓�涓疄鐜頒簡 DAO 鎺ュ彛鐨勫叿浣撶被 
<LI>鏁版嵁浼犺緭瀵硅薄(鏈夋椂縐頒負鍊煎璞? </LI></UL>
<P>鍏蜂綋鐨?DAO 綾誨寘鍚闂壒瀹氭暟鎹簮鐨勬暟鎹殑閫昏緫銆傚湪涓嬮潰涓�鑺備腑鎮ㄥ皢瀛︿範璁捐鍜屽疄鐜版暟鎹闂璞＄殑鎶�鏈�傛湁鍏?DAO 璁捐妯″紡鐨勬洿澶氬唴瀹硅鍙傞槄<A  xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 鍙傝�冭祫鏂?/A>銆?/P>
<P><A name=IDA0CMIB><span id="99hr9pb"    class=atitle2>浜嬪姟鐣屽畾</SPAN></A><BR>鍏充簬 DAO 瑕佽浣忕殑閲嶈涓�鐐規槸瀹冧滑鏄簨鍔℃�у璞°�傜敱 DAO 鎵�鎵ц鐨勬瘡涓�涓搷浣?-- 濡傚垱寤恒�佹洿鏂版垨鑰呭垹闄ゆ暟鎹?-- 閮戒笌涓�涓簨鍔＄浉鍏寵仈銆傚洜姝わ紝<I xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">浜嬪姟鐣屽畾</I>鐨勬蹇靛氨鍙樺緱鐗瑰埆閲嶈浜嗐�?/P>
<P>浜嬪姟鐣屽畾鏄畾涔変簨鍔¤竟鐣岀殑鏂瑰紡銆侸2EE 瑙勮寖鎻忚堪浜嗕袱縐嶄簨鍔＄晫瀹氱殑妯″瀷錛氱紪紼嬪紡(programmatic)鍜屽０鏄庡紡(declarative)銆傝〃 1 鍒嗘瀽浜嗚繖涓ょ妯″瀷錛?/P>
<P><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">琛?1. 涓ょ浜嬪姟鐣屽畾鐨勬ā鍨?/B> 
<TABLE cellSpacing=0 cellPadding=3 width="100%" border=1>
<TBODY>
<TR>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">澹版槑寮忎簨鍔＄晫瀹?/B></TD>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">緙栫▼寮忎簨鍔＄晫瀹?/B></TD></TR>
<TR>
<TD>紼嬪簭鍛樼敤 EJB 閮ㄧ講鎻忚堪絎﹀０鏄庝簨鍔″睘鎬с�?/TD>
<TD>紼嬪簭鍛樿礋璐ｇ紪鍐欎簨鍔￠�昏緫銆?/TD></TR>
<TR>
<TD>榪愯鏃剁幆澧?EJB 瀹瑰櫒)鐢ㄨ繖浜涘睘鎬ц嚜鍔ㄧ鐞嗕簨鍔°�?/TD>
<TD>搴旂敤紼嬪簭閫氳繃涓�涓?API 鎺у埗浜嬪姟銆?/TD></TR></TBODY></TABLE></P>
<P>鎴戜滑灝嗕晶閲嶄簬緙栫▼寮忎簨鍔＄晫瀹氥�?/P>
<P><A name=IDAZDMIB><span id="1bz979n"    class=atitle3>璁捐鑰冭檻</SPAN></A><BR>濡傚墠鎵�榪幫紝DAO 鏄簨鍔℃�у璞°�備竴涓吀鍨嬬殑 DAO 鎵ц鍍忓垱寤恒�佹洿鏂板拰鍒犻櫎榪欐牱鐨勪簨鍔℃�ф搷浣溿�傚湪璁捐 DAO 鏃訛紝棣栧厛瑕侀棶鑷繁浠ヤ笅闂錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>浜嬪姟瑕佸浣曞紑濮嬶紵 
<LI>浜嬪姟搴斿浣曠粨鏉燂紵 
<LI>鍝竴涓璞″皢璐熻矗寮�濮嬩竴涓簨鍔★紵 
<LI>鍝竴涓璞″皢璐熻矗緇撴潫涓�涓簨鍔★紵 
<LI>DAO 鏄惁瑕佽礋璐ｄ簨鍔＄殑寮�濮嬪拰緇撴潫錛?
<LI>搴旂敤紼嬪簭鏄惁闇�瑕侀�氳繃澶氫釜 DAO 璁塊棶鏁版嵁錛?
<LI>浜嬪姟娑夊強鍒頒竴涓?DAO 榪樻槸澶氫釜 DAO錛?
<LI>涓�涓?DAO 鏄惁璋冪敤鍙︿竴涓?DAO 鐨勬柟娉曪紵 </LI></UL>
<P>浜嗚В涓婅堪闂鐨勭瓟妗堝皢鏈夊姪浜庢偍閫夋嫨鏈�閫傚悎鐨?DAO 鐨勪簨鍔＄晫瀹氱瓥鐣ャ�傚湪 DAO 涓湁涓ょ涓昏鐨勭晫瀹氫簨鍔＄殑絳栫暐銆備竴縐嶆柟寮忔槸璁?DAO 璐熻矗鐣屽畾浜嬪姟錛屽彟涓�縐嶅皢浜嬪姟鐣屽畾浜ょ粰璋冪敤榪欎釜 DAO 鏂規硶鐨勫璞″鐞嗐�傚鏋滈�夋嫨浜嗗墠涓�縐嶆柟寮忥紝閭ｄ箞灝卞皢浜嬪姟浠ｇ爜宓屽叆鍒?DAO 涓�傚鏋滈�夋嫨鍚庝竴縐嶆柟寮忥紝閭ｄ箞浜嬪姟鐣屽畾浠ｇ爜灝辨槸鍦?DAO 綾誨闈€�傛垜浠皢浣跨敤綆�鍗曠殑浠ｇ爜紺轟緥甯姪鎮ㄦ洿濂界悊瑙ｆ瘡涓�縐嶆柟寮忔槸濡備綍宸ヤ綔鐨勩�?/P>
<P>娓呭崟 1 鏄劇ず浜嗕竴涓湁涓ょ鏁版嵁鎿嶄綔鐨?DAO錛氬垱寤哄拰鏇存柊錛?/P><A name=IDAMEMIB><B>娓呭崟 1. DAO 鏂規硶</B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>
       public void createWarehouseProfile(WHProfile profile);
       public void updateWarehouseStatus(WHIdentifier id, StatusInfo status);
</CODE></PRE></TD></TR></TBODY></TABLE>
<P>娓呭崟 2 鏄劇ず浜嗕竴涓畝鍗曠殑浜嬪姟銆備簨鍔＄晫瀹氬湪 DAO 綾誨闈€�傛敞鎰忓湪榪欎釜渚嬪瓙涓皟鐢ㄨ�呮槸濡備綍鍦ㄤ竴涓簨鍔′腑緇撳悎澶氫釜 DAO 鎿嶄綔鐨勩�?/P><A name=IDAXEMIB><B>娓呭崟 2. 璋冪敤鑰呯鐞嗙殑浜嬪姟</B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>
      tx.begin();    // start the transaction
      dao.createWarehouseProfile(profile);
      dao.updateWarehouseStatus(id1, status1);
      dao.updateWarehouseStatus(id2, status2);
      tx.commit();   // end the transaction
</CODE></PRE></TD></TR></TBODY></TABLE>
<P>榪欑浜嬪姟鐣屽畾絳栫暐瀵逛簬闇�瑕佸湪涓�涓簨鍔′腑璁塊棶澶氫釜 DAO 鐨勫簲鐢ㄧ▼搴忕壒鍒湁鐢ㄣ�?/P>
<P>鍙互鐢?JDBC API 鎴栬�?Java 浜嬪姟 API(Java Transaction API JTA)瀹炵幇浜嬪姟鐣屽畾銆?JDBC 浜嬪姟鐣屽畾姣?JTA 浜嬪姟鐣屽畾瑕佺畝鍗曪紝浣嗘槸 JTA 鎻愪緵浜嗘洿澶氱殑鐏墊椿鎬с�傚湪涓嬮潰涓�鑺備腑鎴戝皢鏇存繁鍏ュ湴鍒嗘瀽浜嬪姟鐣屽畾鐨勬満鍒躲�?/P>
<P><A name=IDADFMIB><span id="ddlnndf"    class=atitle2>鐢?JDBC 榪涜浜嬪姟鐣屽畾</SPAN></A><BR>JDBC 浜嬪姟鏄敤<CODE> Connection</CODE> 瀵硅薄鎺у埗鐨勩�侸DBC Connection 鎺ュ彛(<CODE>java.sql.Connection</CODE>)鎻愪緵浜嗕袱縐嶄簨鍔℃ā寮忥細鑷姩鎻愪氦鍜屾墜宸ユ彁浜ゃ�?CODE>java.sql.Connection</CODE> 鎻愪緵浜嗕互涓嬫帶鍒朵簨鍔＄殑鏂規硶錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI><CODE>public void setAutoCommit(boolean)</CODE> 
<LI><CODE>public boolean getAutoCommit()</CODE> 
<LI><CODE>public void commit()</CODE> 
<LI><CODE>public void rollback()</CODE></LI></UL>
<P>娓呭崟 3 鏄劇ず浜嗗浣曠敤 JDBC API 鐣屽畾涓�涓簨鍔★細</P><A name=IDAKGMIB><B>娓呭崟 3. 鐢?JDBC API 榪涜浜嬪姟鐣屽畾</B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>
      import java.sql.*;
      import javax.sql.*;

      // ...
      DataSource ds = obtainDataSource();
      Connection conn = ds.getConnection();
      conn.setAutoCommit(false);
      // ...
      pstmt = conn.prepareStatement("UPDATE MOVIES ...");
      pstmt.setString(1, "The Great Escape");
      pstmt.executeUpdate();
      // ...
      conn.commit();
      // ...
</CODE></PRE></TD></TR></TBODY></TABLE>
<P>浣跨敤 JDBC 浜嬪姟鐣屽畾鏃訛紝鎮ㄥ彲浠ュ皢澶氫釜 SQL 璇彞緇撳悎鍒頒竴涓簨鍔′腑銆侸DBC 浜嬪姟鐨勪竴涓己鐐規槸浜嬪姟鐨勮寖鍥村眬闄愪簬涓�涓暟鎹簱榪炴帴銆備竴涓?JDBC 浜嬪姟涓嶈兘璺ㄨ秺澶氫釜鏁版嵁搴撱�傚湪涓嬮潰錛屾垜浠皢鐪嬩竴涓嬪浣曠敤 JTA 榪涜浜嬪姟鐣屽畾銆傚洜涓?JTA 涓嶅儚 JDBC 閭ｆ牱鏈夊悕錛屾墍浠ユ垜浠鍏堝仛涓�涓畝浠嬨�?/P>
<P><A name=IDAVGMIB><span id="797hnfn"    class=atitle2>JTA 綆�浠?/SPAN></A><BR>Java 浜嬪姟 API(JTA) 鍙婂叾鍚岄棬鍏勫紵 Java 浜嬪姟鏈嶅姟(Java Transaction Service JTS)涓?J2EE 騫沖彴鎻愪緵浜嗗垎甯冨紡浜嬪姟鏈嶅姟銆備竴涓?I xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鍒嗗竷寮忕殑浜嬪姟</I>娑夊強涓�涓簨鍔＄鐞嗗櫒鍜屼竴涓垨鑰呭涓祫婧愮鐞嗗櫒銆備竴涓?I xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">璧勬簮綆＄悊鍣?/I>鏄換浣曠被鍨嬬殑鎸佷箙鎬х殑鏁版嵁瀛樺偍銆備簨鍔＄鐞嗗櫒璐熻矗鍗忚皟鎵�鏈変簨鍔″弬涓庤�呬箣闂寸殑閫氫俊銆備簨鍔＄鐞嗗櫒涓庤祫婧愮鐞嗗櫒涔嬮棿鐨勫叧緋誨鍥?2 鎵�紺猴細</P>
<P><A name=IDADHMIB><B>鍥?2. 涓�涓簨鍔＄鐞嗗櫒鍜岃祫婧愮鐞嗗櫒</B></A><BR><IMG height=244 alt=涓�涓簨鍔＄鐞嗗櫒鍜岃祫婧愮鐞嗗櫒 src="http://www-900.ibm.com/developerWorks/cn/java/j-dao/images/transactionmanager.jpg" width=358></P>
<P>JTA 浜嬪姟姣?JDBC 浜嬪姟鍔熻兘鏇村己銆侸DBC 浜嬪姟灞�闄愪負涓�涓暟鎹簱榪炴帴錛岃�?JTA 浜嬪姟鍙互鏈夊涓弬涓庤�呫�傛墍鏈変笅鍒?Java 騫沖彴緇勪歡閮藉彲浠ュ弬涓?JTA 浜嬪姟錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>JDBC 榪炴帴 
<LI>JDO <CODE>PersistenceManager</CODE> 瀵硅薄 
<LI>JMS 闃熷垪 
<LI>JMS 涓婚 
<LI>浼佷笟 JavaBeans 
<LI>絎﹀悎 J2EE 榪炴帴浣撶郴緇撴瀯(J2EE Connector Architecture)瑙勮寖鐨勮祫婧愰�傞厤鍣?</LI></UL>
<P><A name=IDA2HMIB><span id="x71x9rn"    class=atitle2>浣跨敤 JTA 鐨勪簨鍔＄晫瀹?/SPAN></A><BR>瑕佺敤 JTA 榪涜浜嬪姟鐣屽畾錛屽簲鐢ㄧ▼搴忚璋冪敤 <CODE>javax.transaction.UserTransaction</CODE> 鎺ュ彛涓殑鏂規硶銆傛竻鍗?4 鏄劇ず浜嗗 <CODE>UserTransaction</CODE> 瀵硅薄鐨勫吀鍨?JNDI 鏌ヨ錛?/P><A name=IDAQQMIB><B>娓呭崟 4. 涓�涓 UserTransaction 瀵硅薄鐨?/B></A><STRONG> JDNI 鏌ヨ</STRONG><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>

      import javax.transaction.*;
      import javax.naming.*;
      // ...
      InitialContext ctx = new InitialContext();
      Object txObj = ctx.lookup("java:comp/UserTransaction");
      UserTransaction utx = (UserTransaction) txObj;

</CODE></PRE></TD></TR></TBODY></TABLE>
<P>褰撳簲鐢ㄧ▼搴忔壘鍒頒簡 <CODE>UserTransaction </CODE>瀵硅薄鍚庯紝灝卞彲浠ュ紑濮嬩簨鍔′簡錛屽娓呭崟 5 鎵�紺猴細</P><A name=IDAARMIB><B>娓呭崟 5. 鐢?JTA 寮�濮嬩竴涓簨鍔?/B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>

      utx.begin();
      // ...
      DataSource ds = obtainXADataSource();
      Connection conn = ds.getConnection();
      pstmt = conn.prepareStatement("UPDATE MOVIES ...");
      pstmt.setString(1, "Spinal Tap");
      pstmt.executeUpdate();
      // ...
      utx.commit();
      // ...

</CODE></PRE></TD></TR></TBODY></TABLE>
<P>褰撳簲鐢ㄧ▼搴忚皟鐢?CODE> commit()</CODE>鏃訛紝浜嬪姟綆＄悊鍣ㄧ敤涓�涓袱闃舵鐨勬彁浜ゅ崗璁粨鏉熶簨鍔°�?/P>
<P><A name=IDAQRMIB><span id="rlfxznb"    class=atitle3>鎺у埗浜嬪姟鐨?JTA 鏂規硶</SPAN></A><BR><CODE>javax.transaction.UserTransaction</CODE> 鎺ュ彛鎻愪緵浜嗕互涓嬩簨鍔℃帶鍒舵柟娉曪細</P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI><CODE>public void begin()</CODE> 
<LI><CODE>public void commit()</CODE> 
<LI><CODE>public void rollback()</CODE> 
<LI><CODE>public int getStatus()</CODE> 
<LI><CODE>public void setRollbackOnly()</CODE> 
<LI><CODE>public void setTransactionTimeout(int)</CODE></LI></UL>
<P>搴旂敤紼嬪簭璋冪敤<CODE> begin()</CODE> 寮�濮嬩簨鍔°�傚簲鐢ㄧ▼搴忚皟鐢?<CODE>commit()</CODE> 鎴栬�?CODE> rollback()</CODE> 緇撴潫浜嬪姟銆傚弬闃?A  xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鍙傝�冭祫鏂?/A>浠ヤ簡瑙ｆ洿澶氬叧浜庣敤 JTA 榪涜浜嬪姟綆＄悊鐨勫唴瀹廣�?/P>
<P><A name=IDAITMIB><span id="h77917r"    class=atitle2>浣跨敤 JTA 鍜?JDBC</SPAN></A><BR>寮�鍙戜漢鍛橀�氬父鍦?DAO 綾諱腑鐢?JDBC 榪涜搴曞眰鏁版嵁鎿嶄綔銆傚鏋滆鍒掔敤 JTA 鐣屽畾浜嬪姟錛岄偅涔堝氨闇�瑕佹湁涓�涓疄鐜?<CODE>javax.sql.XADataSource</CODE>銆?CODE>javax.sql.XAConnection </CODE>鍜?<CODE>javax.sql.XAResource</CODE> 鎺ュ彛鐨?JDBC 椹卞姩紼嬪簭銆備竴涓疄鐜頒簡榪欎簺鎺ュ彛鐨勯┍鍔ㄧ▼搴忓皢鍙互鍙備笌 JTA 浜嬪姟銆備竴涓?CODE> XADataSource</CODE> 瀵硅薄灝辨槸涓�涓?<CODE>XAConnection</CODE> 瀵硅薄鐨勫伐鍘傘�?CODE>XAConnection</CODE>s 鏄弬涓?JTA 浜嬪姟鐨?JDBC 榪炴帴銆?/P>
<P>鎮ㄥ皢闇�瑕佺敤搴旂敤鏈嶅姟鍣ㄧ殑綆＄悊宸ュ叿璁劇疆<CODE> XADataSource</CODE>銆備粠搴旂敤鏈嶅姟鍣ㄥ拰 JDBC 椹卞姩紼嬪簭鐨勬枃妗ｄ腑鍙互浜嗚В鍒扮浉鍏崇殑鎸囧銆?/P>
<P>J2EE 搴旂敤紼嬪簭鐢?JNDI 鏌ヨ鏁版嵁婧愩�備竴鏃﹀簲鐢ㄧ▼搴忔壘鍒頒簡鏁版嵁婧愬璞★紝瀹冨氨璋冪敤<CODE> javax.sql.DataSource.getConnection()</CODE> 浠ヨ幏寰楀埌鏁版嵁搴撶殑榪炴帴銆?/P>
<P>XA 榪炴帴涓庨潪 XA 榪炴帴涓嶅悓銆備竴瀹氳璁頒綇 XA 榪炴帴鍙備笌浜?JTA 浜嬪姟銆傝繖鎰忓懗鐫� XA 榪炴帴涓嶆敮鎸?JDBC 鐨勮嚜鍔ㄦ彁浜ゅ姛鑳姐�傚悓鏃訛紝搴旂敤紼嬪簭涓�瀹氫笉瑕佸 XA 榪炴帴璋冪敤 <CODE>java.sql.Connection.commit()</CODE> 鎴栬�?CODE> java.sql.Connection.rollback()</CODE>銆傜浉鍙嶏紝搴旂敤紼嬪簭搴旇浣跨敤<CODE> UserTransaction.begin()銆?/CODE><CODE>UserTransaction.commit()</CODE> 鍜?CODE> serTransaction.rollback()</CODE>銆?/P>
<P><A name=IDALVMIB><span id="d9n9b79"    class=atitle2>閫夋嫨鏈�濂界殑鏂瑰紡</SPAN></A><BR>鎴戜滑璁ㄨ浜嗗浣曠敤 JDBC 鍜?JTA 鐣屽畾浜嬪姟銆傛瘡涓�縐嶆柟寮忛兘鏈夊叾浼樼偣錛屾偍闇�瑕佸喅瀹氬摢涓�縐嶆渶閫傚悎浜庢偍鐨勫簲鐢ㄧ▼搴忋�?/P>
<P>鍦ㄦ渶榪戠殑璁稿欏圭洰涓紝鎴戜滑灝忕粍鏄敤 JDBC API 榪涗簨鍔＄晫瀹氭潵鏋勫緩 DAO 綾葷殑銆傝繖浜?DAO 綾誨彲浠ユ�葷粨濡備笅錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>浜嬪姟鐣屽畾浠ｇ爜宓屽叆鍦?DAO 綾諱腑銆?
<LI>DAO 綾諱嬌鐢?JDBC API 榪涜浜嬪姟鐣屽畾銆?
<LI>璋冪敤鑰呬笉鑳界晫瀹氫簨鍔°�?
<LI>浜嬪姟鑼冨洿灞�闄愪簬鍗曚釜 JDBC 榪炴帴銆?</LI></UL>
<P>JDBC 浜嬪姟騫朵笉鎬繪槸閫傚悎澶嶆潅鐨勪紒涓氬簲鐢ㄧ▼搴忋�傚鏋滄偍鐨勪簨鍔¤璺ㄨ秺澶氫釜 DAO 鎴栬�呭涓暟鎹簱錛岄偅涔堜笅鍒楀疄鐜扮瓥鐣ヤ篃璁告洿鍚堥�傦細</P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>浜嬪姟鐢?JTA 鐣屽畾銆?
<LI>浜嬪姟鐣屽畾浠ｇ爜浠?DAO 涓垎紱誨嚭鏉ャ�?
<LI>璋冪敤鑰呰礋璐ｇ晫瀹氫簨鍔°�?
<LI>DAO 鍔犲叆涓�涓叏灞�浜嬪姟銆?</LI></UL>
<P>JDBC 鏂瑰紡鐢變簬鍏剁畝鍗曟�ц�屽叿鏈夊惛寮曞姏錛孞TA銆�鏂瑰紡鎻愪緵浜嗘洿澶х殑鐏墊椿鎬с�傛偍鎵�閫夋嫨鐨勫疄鐜板皢鍙栧喅浜庡簲鐢ㄧ▼搴忕殑鐗瑰畾闇�姹傘�?/P>
<P><A name=IDAAWMIB><span id="z7p9prn"    class=atitle2>鏃ュ織璁板綍鍜?DAO</SPAN></A><BR>涓�涓壇濂藉疄鐜扮殑 DAO 綾誨皢浣跨敤鏃ュ織璁板綍鏉ユ崟鎹夋湁鍏沖叾榪愯鏃惰涓虹殑緇嗚妭銆傛偍鍙互閫夋嫨璁板綍寮傚父銆侀厤緗俊鎭�佽繛鎺ョ姸鎬併�丣DBC 椹卞姩紼嬪簭鍏冩暟鎹�佹垨鑰呮煡璇㈠弬鏁般�傛棩蹇楀浜庡紑鍙戠殑鎵�鏈夐樁孌甸兘寰堟湁鐢ㄣ�傛垜緇忓父鍦ㄥ紑鍙戞椂銆佹祴璇曟椂鍜岀敓浜т腑鍒嗘瀽搴旂敤紼嬪簭鏃ュ織銆?/P>
<P>鍦ㄦ湰鑺傦紝鎴戝皢灞曠ず涓�涓樉紺哄浣曞皢 Jakarta Commons Logging 鍔犲叆鍒?DAO 涓殑浠ｇ爜紺轟緥銆傚湪榪欎箣鍓嶏紝璁╂垜浠洖欏句竴涓嬩竴浜涘熀鏈煡璇嗐�?/P>
<P><A name=IDAJWMIB><span id="lx7hvrj"    class=atitle3>閫夋嫨鏃ュ織搴?/SPAN></A><BR>璁稿寮�鍙戜漢鍛樹嬌鐢ㄤ竴縐嶅師濮嬫牸寮忚繘琛屾棩蹇楄褰曪細<CODE>System.out.println</CODE> 鍜?CODE> System.err.println</CODE>銆?CODE>Println</CODE> 璇彞閫熷害蹇笖浣跨敤鏂逛究錛屼絾鏄畠浠病鏈夋彁渚涘叏鍔熻兘鐨勬棩蹇楄褰曠郴緇熸墍鍏鋒湁鐨勫姛鑳姐�傝〃 2 鍒楀嚭浜?Java 騫沖彴鐨勬棩蹇楀簱錛?/P>
<P><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">琛?2. Java 騫沖彴鐨勬棩蹇楀簱</B> 
<TABLE cellSpacing=0 cellPadding=3 width="100%" border=1>
<TBODY>
<TR>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鏃ュ織搴?/B></TD>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">寮�鏀炬簮浠ｇ爜錛?/B></TD>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">URL</B></TD></TR>
<TR>
<TD>java.util.logging</TD>
<TD>涓嶆槸</TD>
<TD>http://java.sun.com/j2se/</TD></TR>
<TR>
<TD>Jakarta Log4j</TD>
<TD>鏄?/TD>
<TD>http://jakarta.apache.org/log4j/</TD></TR>
<TR>
<TD>Jakarta Commons Logging</TD>
<TD>鏄?/TD>
<TD>http://jakarta.apache.org/commons/logging.html</TD></TR></TBODY></TABLE></P>
<P><CODE>java.util.logging</CODE> 鏄?J2SE 1.4 騫沖彴涓婄殑鏍囧噯 API銆備笉榪囷紝澶у鏁板紑鍙戜漢鍛樺悓鎰?Jakarta Log4j 鎻愪緵浜嗘洿澶氱殑鍔熻兘鍜屾洿澶х殑鐏墊椿鎬с�侺og4j 浼樹簬 java.util.logging 鐨勪竴鐐規槸瀹冨悓鏃舵敮鎸?J2SE 1.3 鍜?J2SE 1.4 騫沖彴銆?/P>
<P>Jakarta Commons Logging 鍙互涓?CODE> java.util.logging</CODE> 鎴栬�?Jakarta Log4j 涓�鍚屼嬌鐢ㄣ�侰ommons Logging 鏄竴涓棩蹇楁娊璞″眰錛屽畠闅旂浜嗗簲鐢ㄧ▼搴忎笌搴曞眰鏃ュ織瀹炵幇銆備嬌鐢?Commons Logging錛屾偍鍙互閫氳繃鏀瑰彉閰嶇疆鏂囦歡鏇存崲搴曞眰鏃ュ織瀹炵幇銆侰ommons Logging 鍦?Jakarta Struts 1.1 鍜?Jakarta HttpClient 2.0 涓嬌鐢ㄣ�?/P>
<P><A name=IDAGYMIB><span id="jtvfhh9"    class=atitle3>涓�涓棩蹇楄褰曠ず渚?/SPAN></A><BR>娓呭崟 7 鏄劇ず浜嗗浣曞湪 DAO 綾諱腑浣跨敤 Jakarta Commons Logging錛?/P><A name=IDAOYMIB><B>娓呭崟 7. DAO 綾諱腑鐨?Jakarta Commons Logging </B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>
import org.apache.commons.logging.*;

class DocumentDAOImpl implements DocumentDAO
{
      static private final Log log = LogFactory.getLog(DocumentDAOImpl.class);

      public void deleteDocument(String id)
      {
          // ...
          log.debug("deleting document: " + id);
          // ...
          try
          {
              // ... data operations ...
          }
          catch (SomeException ex)
          {
              log.error("Unable to delete document", ex);
              // ... handle the exception ...
	}
      }
}
</CODE></PRE></TD></TR></TBODY></TABLE>
<P>鏃ュ織璁板綍鏄墍鏈変換鍔″叧閿瀷搴旂敤紼嬪簭鐨勯噸瑕侀儴鍒嗐�傚鏋滃湪 DAO 涓亣鍒版晠闅滐紝閭ｄ箞鏃ュ織閫氬父鍙互鎻愪緵鍒ゆ柇鍑洪敊浣嶇疆鐨勬渶濂戒俊鎭�傚皢鏃ュ織鍔犲叆鍒?DAO 鍙互淇濊瘉鎮ㄦ湁鏈轟細榪涜璋冭瘯鍜屾晠闅滄帓闄ゃ�?/P>
<P><A name=IDAZYMIB><span id="jjl7xvf"    class=atitle2>DAO 涓殑寮傚父澶勭悊</SPAN></A><BR>鎴戜滑璁ㄨ榪囦簡浜嬪姟鐣屽畾鍜屾棩蹇楋紝鐜板湪瀵逛簬濡備綍鍦ㄦ暟鎹闂璞′笂搴旂敤瀹冧滑鏈変簡鏇存繁鍏ョ殑鐞嗚В銆傛垜浠殑絎笁涓拰鏈�鍚庝竴涓璁鴻棰樻槸寮傚父澶勭悊銆傞伒浠庡嚑涓畝鍗曠殑寮傚父澶勭悊鎸囧鍙互浣挎偍鐨?DAO 鏇村鏄撲嬌鐢ㄣ�佹洿鍋ュ．鍙婃洿鏄撲簬緇存姢銆?/P>
<P>鍦ㄥ疄鐜?DAO 妯″紡鏃訛紝鑰冭檻浠ヤ笅闂錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>DAO 鐨勫叕鍏辨帴鍙ｄ腑鐨勬柟娉曟槸鍚︽姏鍑烘鏌ヨ繃鐨勫紓甯革紵 
<LI>濡傛灉鏄殑璇濓紝鎶涘嚭浣曠媯�鏌ヨ繃鐨勫紓甯革紵 
<LI>鍦?DAO 瀹炵幇綾諱腑濡備綍澶勭悊寮傚父錛?</LI></UL>
<P>鍦ㄤ嬌鐢?DAO 妯″紡鐨勮繃紼嬩腑錛屾垜浠殑灝忕粍寮�鍙戜簡涓�浜涘鐞嗗紓甯哥殑鍘熷垯銆傞伒浠庤繖浜涘師鍒欏彲浠ユ瀬澶у湴鏀硅繘鎮ㄧ殑 DAO錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI>DAO 鏂規硶搴旇鎶涘嚭鏈夋剰涔夌殑寮傚父銆?BR><BR>
<LI>DAO 鏂規硶涓嶅簲璇ユ姏鍑?<CODE>java.lang.Exception</CODE>銆?CODE>java.lang.Exception</CODE> 澶竴鑸寲浜嗐�傚畠涓嶄紶閫掑叧浜庡簳灞傞棶棰樼殑浠諱綍淇℃伅銆?BR><BR>
<LI>DAO 鏂規硶涓嶅簲璇ユ姏鍑?CODE> java.sql.SQLException</CODE>銆係QLException 鏄竴涓綆綰у埆鐨?JDBC 寮傚父銆備竴涓?DAO 搴旇鍔涗簤灝佽 JDBC 鑰屼笉鏄皢 JDBC 鍏紑緇欏簲鐢ㄧ▼搴忕殑鍏朵綑閮ㄥ垎銆?BR><BR>
<LI>鍙湁鍦ㄥ彲浠ュ悎鐞嗗湴棰勬湡璋冪敤鑰呭彲浠ュ鐞嗗紓甯告椂錛孌AO 鎺ュ彛涓殑鏂規硶鎵嶅簲璇ユ姏鍑烘鏌ヨ繃鐨勫紓甯搞�傚鏋滆皟鐢ㄨ�呬笉鑳戒互鏈夋剰涔夌殑鏂瑰紡澶勭悊榪欎釜寮傚父錛岄偅涔堣�冭檻鎶涘嚭涓�涓湭媯�鏌ョ殑(榪愯鏃?寮傚父銆?BR><BR>
<LI>濡傛灉鏁版嵁璁塊棶浠ｇ爜鎹曡幏浜嗕竴涓紓甯革紝涓嶈蹇界暐瀹冦�傚拷鐣ユ崟鑾風殑寮傚父鐨?DAO 鏄緢闅捐繘琛屾晠闅滆瘖鏂殑銆?BR><BR>
<LI>浣跨敤閾炬帴鐨勫紓甯稿皢浣庣駭鍒殑寮傚父杞寲涓洪珮綰у埆鐨勫紓甯搞�?BR><BR>
<LI>鑰冭檻瀹氫箟鏍囧噯 DAO 寮傚父綾匯�係pring Framework (鍙傞槄<A >鍙傝�冭祫鏂?/A>)鎻愪緵浜嗗緢濂界殑涓�濂楅瀹氫箟鐨?DAO 寮傚父綾匯�?</LI></UL>
<P>鏈夊叧寮傚父鍜屽紓甯稿鐞嗘妧鏈殑鏇村淇℃伅鍙傞槄<A  xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鍙傝�冭祫鏂?/A>銆?/P>
<P><A name=IDAY0MIB><span id="7fhxp97"    class=atitle2>瀹炵幇瀹炰緥錛?MovieDAO</SPAN></A><BR><CODE>MovieDAO</CODE> 鏄竴涓睍紺烘湰鏂囦腑璁ㄨ鐨勬墍鏈夋妧鏈殑 DAO錛氫簨鍔＄晫瀹氥�佹棩蹇楀拰寮傚父澶勭悊銆傛偍鍙互鍦?A  xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鍙傝�冭祫鏂?/A>涓�鑺備腑鎵懼埌<CODE> MovieDAO</CODE> 婧愪唬鐮併�備唬鐮佸垎涓轟笁涓寘錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI><CODE>daoexamples.exception</CODE> 
<LI><CODE>daoexamples.movie</CODE> 
<LI><CODE>daoexamples.moviedemo</CODE></LI></UL>
<P>DAO 妯″紡鐨勮繖涓疄鐜板寘鍚笅闈㈠垪鍑虹殑綾誨拰鎺ュ彛錛?/P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI><CODE>daoexamples.movie.MovieDAOFactory</CODE> 
<LI><CODE>daoexamples.movie.MovieDAO</CODE> 
<LI><CODE>daoexamples.movie.MovieDAOImpl</CODE> 
<LI><CODE>daoexamples.movie.MovieDAOImplJTA</CODE> 
<LI><CODE>daoexamples.movie.Movie</CODE> 
<LI><CODE>daoexamples.movie.MovieImpl</CODE> 
<LI><CODE>daoexamples.movie.MovieNotFoundException</CODE> 
<LI><CODE>daoexamples.movie.MovieUtil</CODE></LI></UL>
<P><CODE>MovieDAO</CODE> 鎺ュ彛瀹氫箟浜?DAO 鐨勬暟鎹搷浣溿�傝繖涓帴鍙ｆ湁浜斾釜鏂規硶錛屽涓嬫墍紺猴細</P>
<UL xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LI><CODE>public Movie findMovieById(String id)</CODE> 
<LI><CODE>public java.util.Collection findMoviesByYear(String year)</CODE> 
<LI><CODE>public void deleteMovie(String id)</CODE> 
<LI><CODE>public Movie createMovie(String rating, String year, String, title)</CODE> 
<LI><CODE>public void updateMovie(String id, String rating, String year, String title)</CODE></LI></UL>
<P><CODE>daoexamples.movie</CODE> 鍖呭寘鍚?<CODE>MovieDAO</CODE> 鎺ュ彛鐨勪袱涓疄鐜般�傛瘡涓�涓疄鐜頒嬌鐢ㄤ竴縐嶄笉鍚岀殑鏂瑰紡榪涜浜嬪姟鐣屽畾錛屽琛?3 鎵�紺猴細</P>
<P><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">琛?3. MovieDAO 瀹炵幇</B> 
<TABLE cellSpacing=0 cellPadding=3 width="100%" border=1>
<TBODY>
<TR>
<TD></TD>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">MovieDAOImpl</B></TD>
<TD><B xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">MovieDAOImplJTA</B></TD></TR>
<TR>
<TD>瀹炵幇 MovieDAO 鎺ュ彛?</TD>
<TD>鏄?/TD>
<TD>鏄?/TD></TR>
<TR>
<TD>閫氳繃 JNDI 鑾峰緱 DataSource錛?/TD>
<TD>鏄?/TD>
<TD>鏄?/TD></TR>
<TR>
<TD>浠?DataSource 鑾峰緱 java.sql.Connection 瀵硅薄錛?/TD>
<TD>鏄?/TD>
<TD>鏄?/TD></TR>
<TR>
<TD>DAO 鍦ㄥ唴閮ㄧ晫瀹氫簨鍔★紵</TD>
<TD>鏄?/TD>
<TD>鍚?/TD></TR>
<TR>
<TD>浣跨敤 JDBC 浜嬪姟錛?/TD>
<TD>鏄?/TD>
<TD>鍚?/TD></TR>
<TR>
<TD>浣跨敤涓�涓?XA DataSource錛?/TD>
<TD>鍚?/TD>
<TD>鏄?/TD></TR>
<TR>
<TD>鍙備笌 JTA 浜嬪姟錛?/TD>
<TD>鍚?/TD>
<TD>鏄?/TD></TR></TBODY></TABLE></P>
<P><A name=IDAJ5MIB><span id="9zpv9xv"    class=atitle3>MovieDAO 婕旂ず搴旂敤紼嬪簭</SPAN></A><BR>榪欎釜婕旂ず搴旂敤紼嬪簭鏄竴涓悕涓?<CODE>daoexamples.moviedemo.DemoServlet</CODE> 鐨?servlet 綾匯�?CODE>DemoServlet</CODE> 浣跨敤榪欎袱涓?Movie DAO 鏌ヨ鍜屾洿鏂拌〃涓殑鐢靛獎鏁版嵁銆?/P>
<P>榪欎釜 servlet 灞曠ず浜嗗浣曞皢鏀寔 JTA 鐨?<CODE>MovieDAO</CODE> 鍜?Java 娑堟伅鏈嶅姟(Java Message Service)緇撳悎鍒頒竴涓簨鍔′腑錛屽娓呭崟 8 鎵�紺恒�?/P><A name=IDADANIB><B>娓呭崟 8. 灝?MovieDAO 鍜?JMS 浠ｇ爜緇撳悎鍒頒竴涓簨鍔′腑</B></A><BR>
<TABLE cellSpacing=0 cellPadding=5 width="100%" bgColor=#cccccc border=1>
<TBODY>
<TR>
<TD><PRE><CODE>
	UserTransaction utx = MovieUtil.getUserTransaction();
	utx.begin();
	batman = dao.createMovie("R",
			"2008",
			"Batman Reloaded");
	publisher = new MessagePublisher();
	publisher.publishTextMessage("I'll be back");
	dao.updateMovie(topgun.getId(),
			"PG-13",
			topgun.getReleaseYear(),
			topgun.getTitle());
	dao.deleteMovie(legallyblonde.getId());
	utx.commit();
</CODE></PRE></TD></TR></TBODY></TABLE>
<P>瑕佽繍琛岃繖涓紨紺哄簲鐢ㄧ▼搴忥紝闇�瑕佸湪搴旂敤鏈嶅姟鍣ㄤ笂閰嶇疆涓�涓?XA 鏁版嵁婧愬拰涓�涓潪 XA 鏁版嵁婧愩�傜劧鍚庯紝閮ㄧ講 daoexamples.ear 鏂囦歡銆傝繖涓簲鐢ㄧ▼搴忓彲浠ュ湪浠諱綍鍏煎 J2EE 1.3 鐨勫簲鐢ㄦ湇鍔″櫒涓婅繍琛屻�傚弬闃?A  xmlns:dw="http://www.ibm.com/developerWorks/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">鍙傝�冭祫鏂?/A>浠ヨ幏寰?EAR 鏂囦歡鍜屾簮浠ｇ爜銆?/P>
<P><A name=IDATANIB><span id="bb7n99j"    class=atitle2>緇撴潫璇?/SPAN></A><BR>姝ｅ鏈枃鎵�灞曠ず鐨勶紝瀹炵幇 DAO 妯″紡闇�瑕佸仛姣旂紪鍐欎綆綰у埆鐨勬暟鎹闂唬鐮佹洿澶氱殑宸ヤ綔銆傜幇鍦紝閫氳繃閫夋嫨涓�涓�傚悎鎮ㄧ殑搴旂敤紼嬪簭鐨勪簨鍔＄晫瀹氱瓥鐣ャ�侀�氳繃鍦?DAO 綾諱腑鍔犲叆鏃ュ織璁板綍錛屼互鍙婇�氳繃閬典粠鍑犻」綆�鍗曠殑寮傚父澶勭悊鍘熷垯錛屾偍鍙互鏋勫緩鏇村ソ鐨?DAO銆?/P><img src ="http://www.tkk7.com/Victor/aggbug/1674.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/Victor/" target="_blank">Victor</a> 2005-03-04 09:21 <a href="http://www.tkk7.com/Victor/articles/1674.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                                                                                                                                                                                                                                   <footer>
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