Ibatis返回结果集

object 别名映射->实体类：resultClass < select  id = " selectAll"  resultClass = "AppLog" >     select       ID as id,       TYPE as type,       DESCR as descr     from APP_LOG     where ID = #id# </ select > List  list =  sqlMapper .queryForList( "selectAll" ); for  ( int  i = 0; i < list.size(); i ) {     AppLog log = (AppLog) list.get(i);    //add your code here; } 别名映射->Map类：resultClass < select  id = " selectAll"  resultClass = "java.util.HashMap" >     select       ID as id,       TYPE as type,       DESCR as descr     from APP_LOG     where ID = #id# </ select > List  list =  sqlMapper .queryForList( "selectAll" ); for  ( int  i = 0; i < list.size(); i ) {     Map map = (Map) list.get(i);     String id = (String) map.get( "id" );     String type = (String) map.get( "type" );     String descr = (String) map.get( "descr" );    //add your code here; } 显式映射->实体类：resultMap < resultMap  id = "AppLogResult"  class = "AppLog" >      < result  property = "id"  column = "ID" />      < result  property = "type"  column = "Type" />      < result  property = "descr"  column = "DESCR" />     </ resultMap > < select  id = "selectAll"  resultMap = "AppLogResult" >     select * from APP_LOG </ select > List  list =  sqlMapper .queryForList( "selectAll" ); for  ( int  i = 0; i < list.size(); i ) {     AppLog log = (AppLog) list.get(i);    //add your code here; } 显式映射->Map类：resultMap      < resultMap  id = "map-result"  class = "java.util.HashMap" >         < result  property = "id"  column = "ID" />      < result  property = "type"  column = "Type" />      < result  property = "descr"  column = "DESCR" />      </ resultMap > < select  id = "selectAll2"  resultMap = "map-result" >     select * from APP_LOG </ select > List list = sqlMapper.queryForList("selectAll2");        for (int i = 0; i < list.size(); i ) {            Map map = (Map) list.get(i);            String id = (String) map.get("id");            String type = (String) map.get("type");            String descr = (String) map.get("descr");               } 无映射 < select  id = "selectAll3"  resultClass = "java.util.HashMap" >     select * from APP_LOG </ select > List list = sqlMapper.queryForList("selectAll3"); for (int i = 0; i < list.size(); i ) {     Map map = (Map) list.get(i);     String id = (String) map.get("ID");     String type = (String) map.get("TYPE");     String descr = (String) map.get("DESCR"); } xml xml < select  id = "selectxml"  parameterClass = "java.lang.String"  resultClass = "xml"  xmlResultName = "log" >     select       ID as id,       TYPE as type,       DESCR as descr     from APP_LOG     where ID = #id# </ select > String o=(String)  sqlMapper .queryForObject( "selectxml" , id); System. out .println(o);

 

 

Lambert  2010年10月20日21:48:23

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1 对于返回的对象，如果是普通类如HashMap,java.lang.Integer等的，返回直接

   写 resultClass，如果是返回一个对象（pojo bean）的则要成resultMap

 

2 对于Map类型的返回，返回要写成java.util.HashMap

 

3 对于xml返回的情况不熟悉,估计用的情况也不多吧