Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JPetStore 5.0(iBATIS for java)ÖÐItem.xmlµÄbug

Caused by: java.sql.SQLException: ORA-00918: column ambiguously defined
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:  
--- The error occurred in com/ibatis/jpetstore/persistence/sqlmapdao/sql/Item.xml. 
--- The error occurred while applying a parameter map. 
--- Check the getItem-InlineParameterMap. 
--- Check the statement (query failed). 
--- Cause: java.sql.SQLException: ORA-00918: column ambiguously defined
change  com\ibatis\jpetstore\persistence\sqlmapdao\sql\Item.xml to
ºìɫΪÐ޸ĺóµÄ£º 
<select id="getItem" resultClass="item" parameterClass="string" cacheModel="quantityCache">
      select
      I.ITEMID,
      I.LISTPRICE,
      I.UNITCOST,
      I.SUPPLIER AS supplierId,
      I.PRODUCTID AS "product.productId",
      NAME AS "product.name",
      DESCN AS "product.description",
      CATEGORY AS "product.categoryId",
      STATUS,
      ATTR1 AS attribute1,
      ATTR2 AS attribute2,
      ATTR3 AS attribute3,
      ATTR4 AS attribute4,
      ATTR5 AS attribute5,
      QTY AS quantity
    from ITEM I, INVENTORY V, PRODUCT P
    where P.PRODUCTID = I.PRODUCTID
      and I.ITEMID = V.ITEMID
      and I.ITEMID = #value#
  </select>


Ïà¹ØÎĵµ£º

javaÈëÃÅ

 Javaѧϰ´ÓÈëÃŵ½¾«Í¨ 
Ò»¡¢ JDK (Java Development Kit) 
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......

sql 2005 ´æ´¢¹ý³Ì·ÖÒ³ java ´úÂë

 create PROCEDURE pagelist
@tablename nvarchar(50),
@fieldname nvarchar(50)='*',         
@pagesize int output,--ÿҳÏÔʾ¼Ç¼ÌõÊý
@currentpage int output,--µÚ¼¸Ò³
@orderid nvarchar(50),--Ö÷¼üÅÅÐò
@sort int,--ÅÅÐò·½Ê½£¬1±íʾÉýÐò£¬0±íʾ½µÐòÅÅÁÐ ......

JAVAµÄÄÚÊ¡£¨introspector£©Óë·´É䣨reflection£©

ºÜ¶àÅóÓÑÔÚÉîÈëµÄ½Ó´¥ JAVA ÓïÑÔºó¾Í»á·¢ÏÖÕâÑùÁ½¸ö´Ê£º·´Éä (Reflection) ºÍÄÚÊ¡ (Introspector) £¬¾­³£¸ã²»Çå³þÕâµ½µ×ÊÇÔõô»ØÊ£¬ÔÚʲô³¡ºÏÏÂÓ¦ÓÃÒÔ¼°ÈçºÎʹÓ㿽ñÌì°ÑÕâ¶þÕß·ÅÔÚÒ»Æð½éÉÜ£¬ÒòΪËüÃǶþÕßÊÇÏศÏà³ÉµÄ¡£
·´Éä
<o:p> </o:p>
Ïà¶Ô¶øÑÔ£¬·´Éä±ÈÄÚÊ¡¸üÈÝÒ×Àí½âÒ»µã¡£ÓÃÒ»¾ä±È½Ï°×µÄ»°À´¸ÅÀ ......

javaÎı¾¿òÄÚÈݸıäʼþ

×÷Ϊһ¸ö¿çƽ̨µÄ±à³Ì½â¾ö·½°¸£¬JavaÏÔÈ»²»ÄÜÏñDelphiÄÇÑù£¬ÔÚÓû§½çÃæÉè¼Æ·½ÃæÌṩǿ´ó¡¢Ö±¹ÛºÍ¿ì½ÝµÄÉè¼ÆÖ§³Ö¡£±ÈÈç¶ÔÓÚÎı¾¿òµÄ¿ØÖÆ£¬µ±ÎÒÃÇ ÒªÔÚ³ÌÐòÖиÐÖªÓû§ÊÇ·ñÐÞ¸ÄÁËÎı¾¿òÖеÄÄÚÈÝʱ£¬DelphiÌṩÁËÒ»¸öÖ±½ÓµÄʼþµ÷ÓÃOnValueChanged()£¬¿ÉÒÔÔÚÎı¾¿òÄÚÈݵõ½Êµ¼ÊµÄ¸Ä ¶¯Ê±±»¼¤»î¡£¶øÒªÔÚJavaÖÐʵÏÖÕâÒ»¹¦ÄܾÍËÆºõ ......

JavaÈçºÎ±éÀúMapµÄËùÓеÄÔªËØ

Map map = new HashMap(); 
Iterator it = map.entrySet().iterator(); 
while (it.hasNext()) { 
Map.Entry entry = (Map.Entry) it.next(); 
Object key = entry.getKey(); 
Object value = entry.getValue(); 

......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ