Mybatis技术（五）Mybatis调用存储过程

1．在数据库中创建以下的存储过程：

create or replace procedure pro_hello(p_user_name in varchar2,p_result out varchar2) is
begin
p_result := 'hello,' || p_user_name;
end;

2．编写SQL映射文件mapper.xml：

<select id="proHello" statementType="CALLABLE">
<![CDATA[
{call pro_hello (#{p_user_name,mode=IN,jdbcType=VARCHAR},#{result,mode=OUT,jdbcType=VARCHAR})}
]]>
</select>

3．编写JAVA代码调用存储过程

public class ProcedureTest {

public static void main(String[] args) throws IOException {
String resource = "mybatis.cfg.xml";
Reader reader = Resources.getResourceAsReader(resource);
SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(reader);

SqlSession session = ssf.openSession();

try {
Map<String, String> param = new HashMap<String, String>();
param.put("p_user_name", "zhangsan");
String returnValue = (String) session.selectOne("User.proHello", param);
System.out.println("message=" + param.get("p_user_name"));
System.out.println("result=" + param.get("result"));
System.out.println("returnValue=" + returnValue);

} catch (Exception e) {
e.printStackTrace();
} finally {
session.close();
}
}
}

4．执行Java代码，控制台输出结果如下如何使用Mybaits调用数据库中的存储过程，下面以Oracle数据库的为例：

2013-05-11 0:36:32,406 DEBUG [java.sql.PreparedStatement] -==>  Executing: {call pro_hello(?,?)}
2013-05-11 0:36:32,406 DEBUG [java.sql.PreparedStatement] -==> Parameters: zhangsan(String)
message=zhangsan