新闻正文
1.将ibatis 的jar 包添加到工程中
2.先新建一个xml文件 SqlMap.xml,在这个文件中定义使用了哪些ibatis资源文件
<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE sql-map-config PUBLIC "-//iBATIS.com//DTD SQL Map Config 1.0//EN"
"http://www.ibatis.com/dtd/sql-map-config.dtd">
<sql-map-config>
<sql-map resource="com/montersoft/ibatis/common/monter.xml"/>
</sql-map-config>
3.定义资源文件monter.xml
<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE sql-map
PUBLIC "-//iBATIS.com//DTD SQL Map 1.0//EN"
"http://www.ibatis.com/dtd/sql-map.dtd">
<sql-map name="monter">
<result-map name="monterInfo" class="java.util.HashMap">
<property name="id" column="id" type="VARCHAR"/>
<property name="name" column="name" type="VARCHAR"/>
<property name="age" column="age" type="NUMBERIC"/>
</result-map>
<dynamic-mapped-statement name="monter_getByPk" result-map="monterInfo">
select id,name,age from monter where id = #id#
</dynamic-mapped-statement>
</sql-map>
**注意dynamic-mapped-statement的name 必须唯一
4.定义一个公共类来生成SqlMap
package com.montersoft.ibatis.common;
import java.io.Reader;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.ibatis.common.resources.Resources;
import com.ibatis.db.sqlmap.SqlMap;
import com.ibatis.db.sqlmap.XmlSqlMapBuilder;
public class SqlMapUtil {
private static Log loger = LogFactory.getLog(SqlMapUtil.class);
public static SqlMap sqlMap ;
public static SqlMap loadSqlMap(){
Reader reader = null;
try{
reader = Resources.getResourceAsReader("com/montersoft/ibatis/common/SqlMap.xml");
return XmlSqlMapBuilder.buildSqlMap(reader);
}
catch(Exception e){
loger.error("there is a error=>"+e.getMessage());
}
return null;
}
public static SqlMap getSqlMap(){
if( sqlMap == null )
sqlMap = loadSqlMap();
return sqlMap;
}
}
5.再新建DAO,Vo,
public interface IVO {
}
public class MonterVo implements IVO{
public String id ;
public String name;
public int age;
...省去 get ,set 方法
}
public class MonterDao {
public IVO getBkPK(Connection conn,IVO vo) throws Exception{
try{
Object map = SqlMapUtil.getSqlMap().
getMappedStatement("monter_getByPk").executeQueryForObject(conn,vo);
return copyMap2Vo(map);
}
catch(Exception e){
throw new Exception(e.getMessage());
}
}
private IVO copyMap2Vo(Object map){
MonterVo vo = new MonterVo();
try{
BeanUtils.copyProperties(vo,map);
}
catch(Exception e){
e.printStackTrace();
}
return vo;
}
}
6.至此就建立了一个简单的ibatis示例.
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