实用，简单 ibatis dome （包含多对一；一对多）

dome
使用hsql 数据库；
一对多，多对一；


可以直接运行的 dome: http://www.blogjava.net/Files/Good-Game/iba.rar
本例指涉及到查询，为了简单没有事务，和service层

先看测试运行：

    @Test
     public   void  testLevel() {

         try  {

            Level level  =  (Level)DaoConfig.getSqlMap().queryForObject( " level.getLevelId " ,  new  Integer( 2 ) );
            System.out.println( " f_level= " + level.getFlevel().getName());

            System.out.println( "-> level= " + level.getName());
             for (Level ltmp : level.getClevel()){
                System.out.println( " c_root= " + ltmp.getName());
            }
        }  catch  (SQLException e) {
            e.printStackTrace();
        }
    }

运行结果：

hsql 数据库 初始化
create   table   level   (     id  int   not   null ,     name  varchar ( 80 )  null ,     fid  int  ,      constraint  pk_supplier  primary   key  (id),      constraint  fk_item_1  foreign   key  (fid)          references   level  (id) ) 
create   index  levelName  on   level  (name) 
insert   into   level  (id,name,fid)  values ( 1 , ' root ' , null ) 
insert   into   level  (id,name,fid)  values ( 2 , ' level_1 ' , 1 ) 
insert   into   level  (id,name,fid)  values ( 3 , ' root_2 ' , 1 ) 
insert   into   level  (id,name,fid)  values ( 4 , ' root_1_1 ' , 2 ) 
insert   into   level  (id,name,fid)  values ( 5 , ' root_1_2 ' , 2 ) 
insert   into   level  (id,name,fid)  values ( 6 , ' root_1_1_1 ' , 4 )

运行结果
f_level = root
-> level = level_1
    c_level = root_1_1
    c_level = root_1_2

DaoConfig工具类：

package  test.persistence;

import  com.ibatis.common.jdbc.ScriptRunner;
import  com.ibatis.common.resources.Resources;
import  com.ibatis.sqlmap.client.SqlMapClient;
import  com.ibatis.sqlmap.client.SqlMapClientBuilder;

import  java.io.IOException;
import  java.io.PrintWriter;
import  java.io.Reader;
import  java.sql.Connection;
import  java.sql.DriverManager;
import  java.util.Properties;
/**
 * damo api
 *  http://portals.apache.org/bridges/multiproject/jpetstore/apidocs/overview-summary.html
 *  @author  Administrator
 *
  */
public   class  DaoConfig {

   private   static  SqlMapClient sqlMap  =   null  ;
   static  {
     try  {
      Properties props  =  Resources.getResourceAsProperties( " properties/database.properties " );
      String url  =  props.getProperty( " url " );
      String driver  =  props.getProperty( " driver " );
      String username  =  props.getProperty( " username " );
      String password  =  props.getProperty( " password " );
       if  (url.equals( " jdbc:hsqldb:mem:jpetstore " )) {
        Class.forName(driver).newInstance();
        Connection conn  =  DriverManager.getConnection(url, username, password);
         try  {
          ScriptRunner runner  =   new  ScriptRunner(conn,  false ,  false );
          runner.setErrorLogWriter(  new  PrintWriter(  System.out ) );
          runner.setLogWriter( new  PrintWriter(  System.out ));
          runner.runScript(Resources.getResourceAsReader( " hsql/test.sql " ));
        } catch  (Exception e) {
            e.printStackTrace();
        }  finally  {
          conn.close();
        }
      }
      
      
      String resource  =   " test/persistence/sql-map-config.xml " ;
      Reader reader  =  Resources.getResourceAsReader (resource);
      sqlMap  =  SqlMapClientBuilder.buildSqlMapClient(reader);
    }  catch  (Exception e) {
       throw   new  RuntimeException( " Description.  Cause:  "   +  e, e);
    }
  }

   public   static  SqlMapClient getSqlMap(){
       return  sqlMap ;
  }

}

dao:

public   class  LevelDao {
      public   static  List < Level >   getAll(){
         try  {
             return  DaoConfig.getSqlMap().queryForList( " getAllLevel " );
        }  catch  (Exception e) {
            e.printStackTrace();
        }
         return   null  ;
    }
}

持久类说明

package  test.domain;

import  java.util.List;

public   class  Level {
     private  Integer id ;
     private  String name ;
   
    //得到此对象父节点 (多对一)
     private  Level flevel ;
    //得到此对象孩子节点 (一对多)
     private  List < Level >  clevel;


     public  Integer getId() {
         return  id;
    }

     public   void  setId(Integer id) {
         this .id  =  id;
    }

     public  String getName() {
         return  name;
    }

     public   void  setName(String name) {
         this .name  =  name;
    }



     public  Level getFlevel() {
         return  flevel;
    }

     public   void  setFlevel(Level flevel) {
         this .flevel  =  flevel;
    }

     public  List < Level >  getClevel() {
         return  clevel;
    }

     public   void  setClevel(List < Level >  clevel) {
         this .clevel  =  clevel;
    }

}

level.xml

<? xml version="1.0" encoding="UTF-8"  ?>

<! DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-2.dtd" >

< sqlMap  namespace ="level" >

     < typeAlias  alias ="level"  type ="test.domain.Level"   />
    
     < resultMap  class ="level"  id ="getLevelByFa" >
         < result  property ="id"  column ="id"   />   
         < result  property ="name"  column ="name"   />
         < result  property ="flevel"  column ="fid"  select ="level.getLevelId" />
         < result  property ="clevel"  column ="id"  select ="level.getLevelByfId" />
     </ resultMap >


      < select  id ="getLevelId"  resultClass ="level"  parameterClass ="int"  resultMap ="getLevelByFa"    >   
         select 
         id ,
         name ,
         fid 
         from level   
         WHERE id =#id#  
      </ select >
    
    
      < select  id ="getLevelByfId"  resultClass ="level"  parameterClass ="int"  resultMap ="getLevelByFa"    >   
         select 
         id ,
         name ,
         fid 
         from level   
         WHERE fid =#id#  
      </ select >
</ sqlMap >

map confg

<? xml version="1.0" encoding="UTF-8"  ?>

<! DOCTYPE sqlMapConfig PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-config-2.dtd" >

< sqlMapConfig  >  
     < properties  resource ="properties/database.properties" />
     < settings 
         useStatementNamespaces ="true"
     />       
 
 
   < transactionManager  type ="JDBC" >
     < dataSource  type ="SIMPLE" >
       < property  value ="${driver}"  name ="JDBC.Driver" />
       < property  value ="${url}"  name ="JDBC.ConnectionURL" />
       < property  value ="${username}"  name ="JDBC.Username" />
       < property  value ="${password}"  name ="JDBC.Password" />
     </ dataSource >
   </ transactionManager >

   < sqlMap  resource ="test/persistence/level.xml" />


</ sqlMapConfig >