ibatis返回数据集映射举例

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);