Ibatis 中怎样使用 Oracle Ref Cursor

Release 2.2.0 of iBATIS DataMapper natively supports Oracle REF Cursors - without the need to create a custom type handler. This FAQ shows a very small example on how to use it.

We start with the (Oracle) database related stuff. For this example we've created an Oracle user ibatis. In SQL*Plus (or whichever tool you use) log in as this user and run the commands shown below.


CREATE TABLE REFS (


ID NUMBER NOT NULL PRIMARY KEY


, NAME VARCHAR2(50) NOT NULL


);




CREATE OR REPLACE PACKAGE REFS_PCK AS


TYPE REF_CURSOR_T IS REF CURSOR;


FUNCTION GET_REFS RETURN REF_CURSOR_T;


END REFS_PCK;


/




CREATE OR REPLACE PACKAGE BODY REFS_PCK IS


FUNCTION GET_REFS RETURN REF_CURSOR_T


IS


L_CURSOR REF_CURSOR_T;


BEGIN


OPEN L_CURSOR FOR SELECT * FROM REFS;


RETURN L_CURSOR;


END GET_REFS;


END REFS_PCK;


/




insert into refs values(1,'Jan');


insert into refs values(2,'Danielle');


insert into refs values(3,'Tessa');

We create a simple Java bean class to hold REFS' records.


package com.cumquatit.examples.ibatis.refs;






public class Ref ...{


private int id;




private String name;






public int getId() ...{


return id;


}






public void setId(int id) ...{


this.id = id;


}






public String getName() ...{


return name;


}






public void setName(String name) ...{


this.name = name;


}






public String toString() ...{


return ("id=" + id + ", name=" + name);


}


}

Next create a mapping file for the REFS table.


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


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


<sqlMap>




<typeAlias alias="Ref" type="com.cumquatit.examples.ibatis.refs.Ref" />




<resultMap class="Ref" id="ref-mapping">


<result property="id" column="ID" />


<result property="name" column="NAME" />


</resultMap>




<parameterMap id="output" class="map">


<parameter property="o" javaType="java.sql.ResultSet" jdbcType="ORACLECURSOR" mode="OUT" resultMap="ref-mapping" />


</parameterMap>




<procedure id="getRefs" parameterMap="output">{ ? = call refs_pck.get_refs }</procedure>




</sqlMap>

Also we need a sqlMapConfig file. Below an example of this file.


<?xml version="1.0"?>


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


<sqlMapConfig>


<transactionManager type="JDBC" commitRequired="false">


<dataSource type="SIMPLE">


<property name="JDBC.Driver" value="oracle.jdbc.OracleDriver" />


<property name="JDBC.ConnectionURL" value="jdbc:oracle:thin:@//flash.cumquat.office:1524/neon" />


<property name="JDBC.Username" value="ibatis" />


<property name="JDBC.Password" value="ibatis" />


</dataSource>


</transactionManager>


<sqlMap resource="com/cumquatit/examples/ibatis/refs/Ref.xml" />


</sqlMapConfig>

And to finish up, a small tester program.


package com.cumquatit.examples.ibatis.refs;




import java.io.Reader;


import java.util.HashMap;


import java.util.Map;




import com.ibatis.common.resources.Resources;


import com.ibatis.sqlmap.client.SqlMapClient;


import com.ibatis.sqlmap.client.SqlMapClientBuilder;






public class RefTester ...{




public static void main(String[] args) throws Exception ...{


String resource;


Reader reader;


SqlMapClient sqlMap;


resource = "com/cumquatit/examples/ibatis/refs/SqlMapConfig.xml";


reader = Resources.getResourceAsReader(resource);


sqlMap = SqlMapClientBuilder.buildSqlMapClient(reader);


Map map = new HashMap();


sqlMap.queryForObject("getRefs", map);


System.out.println(map.get("o"));


}


}