Mybatis技术（五）Mybatis调用存储过程

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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：

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();            }         }  }

执行Java代码，控制台输出结果如下：

2016-04-24 20:36:32,406 DEBUG [java.sql.PreparedStatement] -==> Executing: {call pro_hello(?,?)}
2016-03-24 20:36:32,406 DEBUG [java.sql.PreparedStatement] -==> Parameters: zhangsan(String)
message=zhangsan

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